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SCOPE OF WORK (ELECTRICAL) - CIDCO Maharashtra Ltd.

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<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

GENERAL<br />

<strong>SCOPE</strong> <strong>OF</strong> <strong>WORK</strong> (<strong>ELECTRICAL</strong>)<br />

The Scope of work consists of :-<br />

1.0 Planning, designing & execution of HT/LT Cable network as per direction<br />

of Engineer-in-Charge and as per Schedule ‘A’.<br />

2.0 The work includes:-<br />

a) Establishment of Distribution HT/LT network in various sectors.<br />

3.0 Providing & commissioning of :<br />

a) 11KV XLPE cable.<br />

b) L.T. Distribution network consisting of feeder pillars/minipillars<br />

(outdoor type) complete with L.T. underground XLPE armoured<br />

cable network upto consumer’s Electric meter room.<br />

c) All related allied works like trenching, earthing, safety equipments<br />

& obtaining statutory approvals.<br />

NOTE:All the equipments used shall be compatible with SCADA & the<br />

agency has to submit protocol & mapping drawings of equipments<br />

wherever applicable. All protocol shall be as per IEC Standard (e.g.<br />

for relay IEC 870-5-103)<br />

4.0 The entire electrical works should be carried out in accordance with the<br />

specifications without any extra cost. The work shall conform to latest<br />

edition of Indian Standard Specifications & Indian Electricity Rules.<br />

5.0 The works shall be completed as per the requirement of ISO:9002 & all<br />

required documents for the same shall be made available.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

6.0 The Technical specification of all the equipment and the quantities<br />

required of various accessories & auxiliaries. The contractor shall also<br />

ascertain the quantities of items such as HT/LT cables, earthing material,<br />

supporting steel pipes etc. and procure the material as per requirement.<br />

Excess material brought to site & not installed shall not be accepted by<br />

<strong>CIDCO</strong> nor it will be paid for.<br />

7.0 Inspection:<br />

7.1 All equipment shall be offered for inspection.<br />

7.2 The inspection shall be carried out by <strong>CIDCO</strong> representative at any stage<br />

of manufacturing. The contractor shall give free access to the inspector at<br />

a reasonable notice.<br />

7.3 The equipment shall be offered for final inspection at least fifteen days in<br />

advance to enable <strong>CIDCO</strong> to witness the acceptance tests.<br />

7.4 No equipment shall be dispatched to site from the manufacturers work<br />

unless dispatch clearance certificate is issued by the inspecting authority<br />

of <strong>CIDCO</strong>.<br />

7.5 The contractor shall arrange for the inspection of the equipment by<br />

<strong>CIDCO</strong> representative & co-ordinate with them for timely dispatches at no<br />

extra cost to <strong>CIDCO</strong>, including traveling & boarding expenses.<br />

8.0 Documentation :<br />

8.1 The contractor on receipt of LOI shall submit five sets of relevant<br />

descriptive & illustrative literature and general arrangement, schematic<br />

drawings, foundation plans, and any other drawings and the general<br />

technical particulars of all the equipment to be supplied.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

8.2 On completion of the above works, and commissioning, the contractor<br />

shall prepare a set of “as built drawings”, compile all the vendor drawings,<br />

shop test reports, inspection reports, site test reports, operation and<br />

maintenance literature of major equipments for handing over to <strong>CIDCO</strong>.<br />

This shall be compiled in four sets duly bound in a neat handy book.<br />

Separate comprehensive operation & maintenance manual should also be<br />

submitted in four sets.<br />

9.0 Supervision of Erection :<br />

The contractor shall arrange for a trained supervisor of respective<br />

equipment manufacturer during installation, testing & commissioning who<br />

will direct the sequence of erection, make necessary adjustments/<br />

settings, make the equipment ready for testing, certify the pre-<br />

commissioning checks and give permission for commissioning. This shall<br />

be arranged by the contractor at no extra cost to <strong>CIDCO</strong>.<br />

10.0 The drawings given in the tender are indicative. The successful agency<br />

will have to make his own assessment before execution of work.<br />

GENERAL TECHNICAL SPECIFICATIONS<br />

1.0 INTRODUCTION :<br />

<strong>CIDCO</strong> is planning to provide power supply distribution infrastructure in<br />

Kharghar node with Hi-tech equipments for reliable power supply to the<br />

inhabitants of Kharghar node in Sector-25 to 45.<br />

2.0 This specifications given in brief the technical requirements for the<br />

installation, testing & commissioning of power supply distribution<br />

infrastructure at Kharghar node in Sector-25 to 45.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

3.0 It is not the intent to specify herein all the details of design and<br />

construction of the equipment. However the equipment offered shall<br />

confirm in all respects to high standard of engineering design and<br />

workmanship. The installation of the infrastructure shall be executed in a<br />

neat manner and as per good engineering practices. The shop tests as<br />

well as pre-commissioning tests at site shall be conducted as per relevant<br />

IS and as per requirements of individual equipment as well as the set<br />

norms.<br />

4.0 The ratings, performance, testing at works, installation, testing at site,<br />

pre-commissioning checking and commissioning of all the equipment<br />

required shall conform to the latest revisions of all the relevant IS<br />

specifications.<br />

5.0 Site Conditions:<br />

All the equipments offered shall be suitable for following site conditions:-<br />

a) Maximum Temperature : 45 Deg. C<br />

b) Minimum Temperature : 6 Deg. C<br />

c) Design Ambient Temperature : 40 Deg. C<br />

d) Maximum Humidity : 96%<br />

e) Seismic Condition : As per IS 1893<br />

f) Atmosphere : Corrosive as found near as sea<br />

shore.<br />

5.1 The equipment to be supplied by the contractor shall be designed/<br />

suitable for following supply system.<br />

5.1.1 Voltage stepped down to 11KV<br />

Voltage : 11 KV<br />

Frequency : 50 Hz<br />

Fault level : 350 MVA


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

5.1.2 415V / 240V AC supply shall have following voltage & frequency<br />

variation<br />

Voltage : + 6%<br />

Frequency : + 3%<br />

Fault level : 16 KA<br />

5.2 Construction power supply is not available at the site. The contractor<br />

shall make his own arrangement of power supply during construction<br />

works & for equipment testing, transformer filtration etc.<br />

5.2 Water connection is not available. The contractor shall arrange for water<br />

at his cost.<br />

_______________________ ______________________<br />

Stamp and signature of<br />

Contractor<br />

Addl. Chief Engineer (II)<br />

Date :<br />

Date :


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

I) TECHNICAL SPECIFICATIONS FOR 11KV XLPE CABLE<br />

1.0 <strong>SCOPE</strong><br />

1.1 This technical specification covers design, manufacture, testing at<br />

manufacturer’s works, packing & delivery of High Voltage Cross linked<br />

polyethylene insulated PVC Sheathed cables suitable for 11 KV.<br />

1.2 It is not the intent to specify completely herein all the details of design &<br />

construction of the cables. However the cables shall conform to high<br />

standards of engineering, design & workman ship. The equipment offered<br />

shall be complete with all components necessary for its effective and<br />

trouble free operation.<br />

2.0 STANDARDS<br />

2.1 unless otherwise specified elsewhere in its specification, the rating,<br />

performance and testing of cables & accessories shall conform to the<br />

latest revision of all relevant standards.<br />

2.2 A list of such standards is enclosed at ANNEXURE – I.<br />

3.0 PRINCIPAL PARAMETERS<br />

The high Voltage Cables and accessories covered in this specification shall<br />

meet the technical requirements listed at ANNEXURE – II and the<br />

following general technical requirement.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

4.0 GENERAL TECHNICAL REQUIREMENT<br />

4.1 Conductor<br />

4.1.1 The conductor shall be made from electrically pure Aluminium wires. The<br />

wires shall be stranded together and compacted.<br />

4.1.2 The conductor shall be circular in shape.<br />

4.2 Conductor Shielding<br />

An extruded semi conducting compound shall be provided on the<br />

conductor to provide a smooth surface & eliminate electrical stress<br />

concentration.<br />

4.3 Insulation<br />

The core insulation shall be with Cross linked polyethylene unfilled<br />

insulation compound. It shall be free from voids and shall withstand all<br />

mechanical and thermal stresses under steady state & transient operating<br />

conditions. The insulation shall be applied by triple extrusion process.<br />

4.4 Insulation Shielding<br />

The insulation shielding shall consist of non-metallic semi-conducting<br />

compound in combination with non-metallic screening of copper. It shall<br />

be possible to strip the insulation screening without applying heat. The<br />

screen shall be capable to carry single line to ground fault current for a<br />

duration of one second.<br />

4.5 The conductor screen and XLPE insulation screen shall all be extruded in<br />

one operation by extrusion to ensure perfect bonding.<br />

4.6 Armouring<br />

G.I. Flat street wire armouring shall be provided over the inner sheath.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

4.7 Outer Sheath<br />

An outer sheath shall be applied on the cable by extrusion over<br />

armouring. The outer sheath shall be of PVC compound confirming to<br />

Type ST2. The PVC compound shall be suitable for protection against<br />

rodent and termite attack.<br />

4.8 In addition to the above, binder tape, filler, core identification tape shall<br />

be provided.<br />

ANNEXURE-I<br />

11KV XLPE CABLE<br />

APPLICABLE STANDARDS<br />

The cables shall comply with the latest edition of the following standards:<br />

Sr. Indian Standard<br />

Title<br />

No. Spec. No.<br />

1. IS 7098 (Part-II) Cross-linked Polyethylene insulated PVC<br />

sheathed cables : Part II for working<br />

voltages form 3.3KV upto and including<br />

33KV.<br />

2. IS:8130 Conductors for insulated electric cables<br />

and flexible cords.<br />

3. IS:5831 PVC insulation and sheath of electrical<br />

cables.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

Sr. Indian Standard<br />

Title<br />

No. Spec. No.<br />

4. IS:3975 Mild steel wires, strips and tapes for<br />

armouring of cables.<br />

5. IS:2633 Methods of testing weight, thickness and<br />

uniformity of coating on hot dipped<br />

galvanized articles.<br />

6. IS:209 Specification for Zinc<br />

7. IS:1753 Aluminium conductors for insulated cables.<br />

8. IEC:502 Extruded solid dielectric insulated power<br />

cables for rated voltages form 1KV upto 30<br />

KV.<br />

9. IEC:540 & 540A Test methods for insulation and sheaths of<br />

electric cables and cords.<br />

ANNEXURE-II<br />

11KV XLPE CABLES<br />

DESIRED TECHNICAL PARTICULARS<br />

Sr. Description Unit 11kV<br />

No.<br />

Particulars<br />

1. Cable Size Core x Sq.mm. 3C x 300 sq.mm.<br />

2. System Voltage kV 11 KV<br />

3. Type of cable XLPE Insulated<br />

4. Conductor material Aluminium<br />

5. Minimum No. of<br />

strands<br />

No. 30<br />

6. Nominal thickness of<br />

XLPE insulation<br />

mm 3.6<br />

7. Minimum thickness of<br />

common covering<br />

mm 0.7<br />

8. Armouring 4mm x 8 mm


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

Sr.<br />

No.<br />

Description Unit 11kV Particulars<br />

9. Minimum thickness of<br />

outer sheath<br />

mm 2.68<br />

10. Approximate overall<br />

diameter<br />

mm 81<br />

11. Approximate net<br />

weight<br />

kg/km 7260<br />

12. Normal Delivery Length m 250<br />

13. Max. DC Resistance at<br />

20 deg C<br />

Ohms/km 0.1<br />

14. Approximate AC<br />

Resistance<br />

Ohms/km 0.13<br />

15. Approximate reactance<br />

at 50 Hz.<br />

Ohms/km 0.095<br />

16. Approximate<br />

Capacitance per phase<br />

Mfd/km 0.475<br />

17. Current rating Amps 355 (in ground)<br />

440 (in air<br />

18. Short time current<br />

rating<br />

kA 28.2<br />

19. Permissible short<br />

circuit temperature<br />

Deg.C 250<br />

1.1 Earthing :<br />

1.1.1 Each Board, shall be provided with an earth busbar running along the<br />

entire length of the board. Material and size of the earth busbar shall be<br />

as specified. At either end of the earth bus, one (1) clamp type terminal<br />

with nuts, bolts and earthing conductor shall be provided for bolting<br />

Purchaser’s earthing conductor. In case the earth bus is provided near<br />

top of the Board, one down comer at either end shall be provided for<br />

connection to the Owner’s earthing conductor.<br />

1.1.2 Earth busbars shall be supported at suitable intervals.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

1.1.3 Positive connection between all the frames of equipment mounted in the<br />

switchboard and earth busbar shall be provided by using insulated<br />

copper wires/bare busbars of cross section equal to that of the busbar.<br />

1.1.4 All instrument and relay cases shall be connected to the earth busbar<br />

using 1100/650V grade, 2.5 sq.mm. stranded copper earthing<br />

conductor.<br />

II) SPECIFICATIONS FOR EARTHING INSTALLATION<br />

1.0 <strong>SCOPE</strong><br />

The intent of this specification is to define the requirements for the<br />

supply, installation, testing and commissioning of the Earthing System.<br />

Note : The bidder shall have to design the earthing system required for<br />

the installation after measuring the soil resistivity & approvals.<br />

2.0 EARTHING CONDUCTOR/ELECTRODE :<br />

The main grid conductor shall be hot dip galvanized G.I. flat or PVC<br />

insulated aluminium conductor/copper conductor. Sizes for main<br />

conductors shall be marked on the drawings. Earth electrodes shall be as<br />

per IS standard. Thickness of hot dip galvanizing shall not be less than 75<br />

microns.<br />

3.0 EARTHING NET<strong>WORK</strong>:<br />

3.1 The entire earthing installation shall be done in accordance with the<br />

earthing drawings, specifications and the standard drawings of reference


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

attached with this document. The entire earthing system shall fully<br />

comply with the Indian Electricity Act and rules framed thereunder. The<br />

contractor shall carry out any changes desired by the Electrical Inspector<br />

or the owner, in order to make the installation confirm to the Indian<br />

Electricity Rules at no extra cost. The exact location of earth conductors,<br />

earth electrodes and earthing points on the equipment shall be<br />

determined in field, in consultation with the Engineer-in-charge or his<br />

authorized representative. Any changes in the methods, routing, size of<br />

conductors etc. shall be subject to approval of the Owner/ Engineer-in-<br />

charge before execution.<br />

3.2 Excavation and refilling of earth, necessary for laying underground earth<br />

bus loops shall be the responsibility of the contractor.<br />

3.3 The resistance between the earthing system and the general mass of<br />

earth shall be as per IS code of practice. The earth loop impendence to<br />

any point in the electrical system shall not be in excess of 5.0 ohm, in<br />

order to ensure satisfactory operation of protective devices.<br />

3.4 The main earth loop shall be laid at a depth of 300 mm below grade level.<br />

Wherever cable trenches are available, the earth lead shall be laid in the<br />

trenches and shall be firmly cleated to the walls or run of trays when run<br />

in concrete lines trenches. The earthing strip shall be protected against<br />

mechanical damage.<br />

3.5 In process unit areas, the earthing cable shall be run along cable trays<br />

wherever specified in the layout drawings. The earthing cable shall be<br />

suitably cleated and electrically bonded to the cable tray at regular<br />

intervals.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

3.6 Joints and tappings in the main earth loop shall be made in such a way<br />

that reliable and good electrical connections are permanently ensured. All<br />

joints below grade shall be welded and suitably protected by giving two<br />

coats of bitumen and covering with hessian tape. All joints above ground<br />

shall be by means of connectors/lugs as far as practicable. Tee<br />

connectors shall be used for tapping, earth leads from the main earth loop<br />

wherever it is installed above ground. Where aluminium cable risers are<br />

to be connected to the underground GI earth bus, the aluminium cable<br />

riser shall be taken to the nearest earth pit and terminated through a<br />

bolted joint. If this is not practicable then a G.I. risers shall be brought<br />

above grade and a bolted joint shall be made between this GI riser shall<br />

be protected applying two coats of bituminous paint/bitumen on the<br />

exposed portion.<br />

3.7 Conduits in which cables have been installed shall be effectively bonded<br />

and earthed. Cable armoured shall be earthed at both ends.<br />

4.0 EARTHING ELECTRODES:<br />

4.1 Earth pipe electrodes shall be installed as shown in the earthing layout<br />

drawings and in accordance with the standard drawings of reference and<br />

IS:3043. Their location shall be marked to enable accurate location by<br />

permanent markers.<br />

4.2 All earth electrodes shall preferably be driven to a sufficient depth to<br />

reach permanently moist soil. Electrodes shall preferably be situated in a<br />

soil which has a fine texture and which is packed by watering and<br />

ramming as lightly as possible. Wherever practicable, the soil shall be dug<br />

up, all lumps broken and stones removed from the immediate vicinity of<br />

the electrode.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

4.3 All earth electrodes shall be tested for earth resistance by means of<br />

standard earth test meter. The tests shall take place in dry months,<br />

preferably after a protracted dry spell. If necessary, a number of<br />

electrodes shall be connected in parallel to reduce the earth resistance.<br />

In such a case the distance between two electrodes shall not be less than<br />

twice the length of electrode.<br />

4.4 The electrodes shall have a clean surface, not covered by paint, enamel,<br />

grease or other materials of poor conductivity.<br />

4.5 The exact location and number of earth electrodes required at each<br />

location shall be determined in the field in consultation with the<br />

owner/Engineer-in-charge, depending on the soil strata and resistivity, to<br />

meet the ohmic values prescribed in clause 4.3.<br />

4.6 The disconnect facility shall be provided for the individual earth pits to<br />

check their earth resistance periodically.<br />

5.0 CONNECTION :<br />

5.1 All electrical equipment is to be doubly earthed by connecting two points<br />

on equipment to main earthing ring. The earthing ring will be connected<br />

via links to several earth electrodes. The cable armour will be earthed<br />

through the cable glands.<br />

5.2 The following shall be earthed.<br />

1. Transformer neutrals (Double Earthing).<br />

2. Transformer Housing.<br />

3. All switchgear and their earth buses.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

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4. Motor Frames.<br />

5. Non-current carrying metallic parts of electrical equipment such as<br />

switchgear, switch rocks, panel boards, motor control centers,<br />

lighting, power and instrument panels, push button stations, cable<br />

trays, pipes conduits, terminal boxes etc.<br />

6. All fences/enclosures housing electrical equipment.<br />

7. All still structures, rails etc. including bonding between sections.<br />

8. Shield Wire.<br />

9. Structural steel Columns of building etc.<br />

10. Loading racks.<br />

5.3 System shall be earthed by two distint conductors directly connected to<br />

independent earth electrodes which in turn, shall be connected to the<br />

earth loop. The earth connection shall be properly made. A small flexible<br />

aluminium cable loops to bridge the top cover of the transformer and the<br />

tank shall be provided to avoid earth fault current passing through<br />

fastening bolts when there is lightning surge, high voltage surge or failure<br />

of the bushings.<br />

5.4 Each Lightening Arrestor shall be connected to a separate electrode<br />

located as close as possible to it and within he fenced area for each set of<br />

arrestors shall be spaced such that they are all within the enclosing fence.<br />

Each of these electrodes shall be connected to the main earth grid.<br />

5.5 The shield wire shall be connected with the main grid solidly and net<br />

through supporting steel structures.<br />

5.6 All paint, scale and enamel shall be removed from the contact surface<br />

before the earthing connections are made.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

5.7 All hardware used for earthing installation shall be hot dip galvanized for<br />

zinc passivated. Spring washers shall be used for all earthing connections<br />

of equipment having moving parts and for all the connections subject to<br />

vibrations etc.<br />

5.8 Lighting fixtures shall be earthes through the extra core provided in the<br />

lighting cable this purpose.<br />

6.0 TESTING<br />

Earthing system/connections shall be tested as follows:<br />

6.1 Resistance of individual electrodes shall be measured after disconnecting<br />

it from the grid.<br />

6.2 Earthing resistance of the grid shall be measured after connecting all the<br />

electrodes to the grid and generally the test value shall conform to<br />

IS:3043 code of practice unless otherwise specified.<br />

6.3 The resistance to earth shall be measured at the following:<br />

a) At each electrical system earth or system at the following.<br />

b) At each earth provided for structure lightning protections.<br />

c) At one point on each earthing system used to earth electrical<br />

equipment enclosures.<br />

d) At one point on each earthing system used to earth wiring system<br />

enclosures such as metal conduits and cable sheaths or armour.<br />

e) At one point on each fence enclosing electrical equipment.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

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Measurement shall be made before connection is made between<br />

the ground and the object to be grounded.<br />

IV) TECHNICAL SPECIFICATIONS FOR L.T. XLPE POWER<br />

CABLE<br />

1.0 GENERAL<br />

The cables shall be suitable for laying in racks, ducts, trenched, conduits<br />

and underground buried installation with uncontrolled back fill and<br />

chances of flooding by water.<br />

They shall be designed to withstand all mechanical electrical and thermal<br />

stresses under steady state and transient operating conditions. The XLPE<br />

cables shall withstand without damage a three-phase fault current of at<br />

least 26.2 kA for at least 0.5 second. The armour for these power cables<br />

shall be capable of carrying 26.2 kA for at least 0.5 second without<br />

exceeding the maximum allowable temperature of outer sheath.<br />

The XLPE insulated cables shall be capable of withstanding a conductor<br />

temperature of 250 degree C during a short circuit without any damage.<br />

The aluminium wires unsed for manufacturing the cables shall be true<br />

circular in shape before stranding and shall be uniformly good quality, free<br />

from defects. All aluminium used in the cables shall be of H2 grade.<br />

The fillers and inner sheath shall be of non- hygroscopic, fire retardant<br />

material, shall be softer then insulation and outer sheath shall be suitable<br />

for the operating temperatures of the cable.<br />

Progressive sequential marking of the length of cable in meters at every<br />

one meter shall be provided on the outer sheath of all cables.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

The cable shall have outer sheath of a material with an oxygen index of<br />

not less than 29 and a temperature index of not less than 250 degree C.<br />

All the cables shall pass fire resistance test as per IS:1554 (part-1)<br />

Repaired cables shall not be accepted.<br />

Allowable tolerance on the overall diameter of the cables shall be plus or<br />

minus 2 mm.<br />

2.0 XLPE POWER CABLES<br />

The XLPE insulated cables shall be of FR type, C1 category conforming to<br />

IS:7098 (part-1) and its amendments read along with this specification.<br />

The conductor shall be stranded aluminium circular/sector shaped and<br />

compacted. In multicore cables, the core shall be identified by red,<br />

yellow, blue and black coloured strips or colouring of insulation. A distinct<br />

inner sheath shall be provided in all multicore cables. For XLPE cables,<br />

the inner sheath shall be of extruded PVC to type ST-2 of IS:5831. When<br />

armouring is specified for single core cables, the same shall consist of<br />

aluminium wires/strips. The outer sheath shall be extruded PVC to Type<br />

ST-2 of IS:5831 for all XLPE cables.<br />

3.0 CABLE DRUMS :<br />

Cable shall be supplied non-returnable wooden or steel drums of heavy<br />

construction. Wooden drum shall be properly seasoned, sound and free<br />

from defects. Wood preservative shall be applied to the entire drum.<br />

Standard lengths for each size of power and control cables shall be<br />

500/1000 metres (LT cables). The cable length per drum shall be subject<br />

to a tolerance of plus or minus 5% of the standard drum length. The<br />

owner shall have the option of rejecting cable drums with shorter lengths.<br />

However, the total quantity of cables after taking into consideration of all


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cable drums for each size shall be within the tolerance of plus or minus<br />

2%.<br />

A layer of water proof paper shall be applied to the surface of the drums<br />

and over the outermost cable layer.<br />

A clear space of at least 40 mm shall be left between the cables and the<br />

lagging.<br />

Each drum shall carry the manufacturer’s name, the purchaser’s name,<br />

address and contact number and type, size and length of the cable, net<br />

and gross weight stenciled on the both sides of drum. A tag containing<br />

the same information shall be attached to the leading end of the cable.<br />

An arrow and suitable accompanying wording shall be marked on one end<br />

of the reel indicating the direction in which is should be rolled.<br />

Packing shall be sturdy and adequate to protect the cables, from any<br />

injury due to mishandling or other conditions encountered during<br />

transportation, handling and storage. Both cable ends shall be sealed<br />

with PVC/Rubber caps so as to eliminate ingress of water during<br />

transportation and erection.<br />

4.0 TESTS<br />

All cables shall conform to all type, routine and acceptance tests listed in<br />

the relevant IS.<br />

All power cables shall meet the requirements of the following additional<br />

test and type test may be conducted to prove their capabilities.<br />

1. Short time current test of conductors.<br />

2. Short time current test on armours.


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V SPECIFICATIONS FOR CABLE LAYING<br />

1.0 <strong>SCOPE</strong><br />

This is to define the requirements for the installation, testing and<br />

commissioning of the cabling system.<br />

2.0 CABLE SPECIFICATIONS<br />

2.1 Power Cables<br />

Power cables for use on 415V system shall be of 1100 Volts grade,<br />

aluminium conductor, XLPE insulated, PVC sheathed single wire armoured<br />

and overall PVC sheathed. Power cables for HV system shall be<br />

aluminium conductor, XLPE insulted screened, PVC bedded galvanized<br />

steel flat armoured and PVC sheathed cable.<br />

All L.T. cables conform to the relevant sections of IS:1554 Part-I and H.T.<br />

cables shall conform to IS:7098 (Part-II).<br />

Unarmoured cables will be used wherever specified on the cable schedule.<br />

3.0 MISCELLANEOUS MATERIALS<br />

3.1 Connectors<br />

Cable terminations shall be made with aluminium crimped type solderless<br />

lugs of M/s Dowells make or approved equivalent for all aluminium<br />

conductors and stud type terminals.<br />

3.2 Cable Identification<br />

Cable tags shall be of 2 mm thick aluminium strap of suitable size to<br />

contain cable number, equipment number etc.<br />

3.3 Ferrules


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Ferrules shall be of self sticking type and shall be employher to designate<br />

the various cores of control cable by the terminal numbers to which the<br />

cores are connected for ease in identification and maintenance.<br />

3.4 Cable Glands<br />

Cable glands to be supplied shall be brass single/double compression type<br />

as per the directions of Engineer-in-charge. Generally single compression<br />

type cable glands shall be used for indoor protected locations and double<br />

compression type shall be used for outdoor locations.<br />

3.5 Cable Trays<br />

Prefabricated hot dip galvanized sheet steel cable trays shall be used for<br />

maximum support span of 2000 mm unless design is approved for larger<br />

span. For requirements of larger than 750 mm width two trays shall be<br />

run side by side. Cable trays shall be suitable for a cable weight of 50<br />

kg/m running length of tray. Minimum thickness of sheet steel/galvanized<br />

shall be 3 mm/86 micorns. Cable trays fabricated from standard rolled<br />

sections shall used 50 x 50 x 6 /ISMC 100 sections for runners for<br />

supporting spans limited to 2000 mm/more than 2000 mm respectively.<br />

Cross support shall be 32 x 6 mm flat 25 x 25 x 6 mm angle for widths<br />

upt o500 mm/ more than 500 mm respectively. If unit rate not included<br />

in schedule of rates then cable trays if required shall be<br />

fabricated/installed at site as per the per tonne rate for electrical<br />

structural supports etc.<br />

4.0 CABLE LAYING<br />

4.1 Cable network shall include power, control lighting cables, which shall be<br />

laid in trenches, cable trays or conduits as detailed in the relevant<br />

drawings and cable schedules. Erection of cable trays as required shall be<br />

the responsibility of the contractor. Cable routing shall be checked in the


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filed to avoid interference with structures, piping or air-conditioning duct<br />

and minor adjustments shall be done to suit the filed conditions wherever<br />

deemed necessary without any extra cost.<br />

4.2 High voltage, medium voltage and other control and communication<br />

cables shall be separated from each other by adequate spacing or running<br />

through independent pipes, trenches or cable trays, as applicable.<br />

4.3 All cable routes shall be carefully measured and cables cut to the required<br />

lengths, leaving sufficient lengths for the final connection of the cable to<br />

the terminal of the equipment. The various cable lengths cut form the<br />

cable reels shall be carefully selected to prevent undue wastage of cables.<br />

The quantity indicated in the cable schedule is only approximate. The<br />

contractor shall ascertain the exact requirement of cable for a particular<br />

feeder by measuring at site and avoiding interference with structure,<br />

foundation, pipelines or any other works.<br />

4.4 Cables as far as possible shall be laid in complete, uncut lengths from one<br />

termination to the other.<br />

4.5 Cables shall be neatly arranged in the trenches/trays in such manner so<br />

that criss-crossing is avoided and final take off to the motor/switchgear is<br />

facilitated. Arrangement of cables within the trench/trays shall be the<br />

responsibility of the contractor.<br />

4.6 All cables will be identified close to their termination point by cable<br />

numbers as per cable schedule. Cable numbers will be punched on<br />

aluminium straps (2 mm thick) securely fastened to the cable and srapped<br />

around it. Alternatively cable tags shall be circular in construction to<br />

which cable numbers can be conveniently punched. Each underground<br />

cable shall be provided with identify tags of lead securely fastened every


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30 m of its underground length with atleast one tag at each end before<br />

the cable enters the ground. In unpaved areas, cable trenches shall be<br />

identified by means of markers as per standard drawing. These posts<br />

shall be placed at location of changers in the direction of cables and at<br />

intervals of not more than 30 m and at cable joint locations.<br />

4.7 All temporary ends of cables must be protected against dirt and moisture<br />

to prevent damage to the insulation. For this purpose, ends of all PVC<br />

insulated cables shall be taped with an approved PVC or rubber insulating<br />

tape. Use of friction type or other fabric type tape is not permitted. Lead<br />

sheathed cables shall be plumbed with lead olloy.<br />

4.8 RCC cable trenches with insert plates shall be provided by the contractor.<br />

Cable shall be laid in 3 to 4 tiers in these trenches.<br />

4.9 Directly buried cables shall be laid underground in excavated cable<br />

trenches where specified and layout drawings. Trenches shall be of<br />

minimum 0.9 mtr. depth and suitable width for accommodation of all<br />

cables correctly spaced and arranged with a view of heat dissipation and<br />

economy of design. Depth of burying shall allow minimum 900 mm soil<br />

cover for low voltage and 1000 mm for 11KV cables.<br />

L.T. cables shall be laid in trenches as above stated depth. Before cables<br />

are placed, the trenches bottom shall be filled with layer of sand. This<br />

sand shall be leveled and the cables laid over it. The cables shall be<br />

covered with 150 mm of sand on top of the largest diameter cable and<br />

sand shall be lightly pressed. A protective covering of 75 mm thick<br />

second class red bricks shall then be laid flat. The remainder of the<br />

trench shall then be back-filled with soil, rammed and leveled.


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As each row of cables is laid in place and before covering with sand every<br />

cables shall be given an insulation test in the presence of Engineer-in-<br />

charge/Owner. Any cable which proves defective shall be replaced before<br />

the next group of cables are laid.<br />

All wall openings shall be effectively sealed after installation of cables to<br />

avoid leakage of water.<br />

4.10 Where cables rise from trenches to motor, control, station, lighting panels<br />

etc., they shall be taken in G.I. pipes for mechanical protection upto a<br />

minimum of 300 mm acboe grade or as shown in the standard drawings.<br />

Cable ends shall be carefully pulled through the conduits to prevent<br />

damge to the cable. Where required, approved cable lubricant shall be<br />

used for this purpose. Where cable enters conduit the cable should be<br />

bent in large radius. Radius shall not be less than the recommended<br />

bending radius of the cables specified by the manufacturer.<br />

Following guide of the pipe fill shall be used for sizing the pipe size:-<br />

a) 1 Cable in pipe : 53% full<br />

b) 2 Cables in pipe : 31% full<br />

c) 3 or more cables : 43% full<br />

d) Multiple cables : 40 % full.<br />

After the cables are installed and all testing is complete, conduit ends<br />

above grade shall be plugged with a suitable weatherproof plastic<br />

compound/PUTTI for sealing purpose. Alternatively G.I. Lids or PVC<br />

bushes shall be employed for sealing purposes. The cost for the same<br />

shall be deemed to have been included in the installation of G.I. pipe and<br />

no separate payment shall be done.


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4.11 Where cables pass through foundation wall or other underground<br />

structures, the necessary ducts or openings will be provided in advance<br />

for the same. However, should it become necessary to cut holes in<br />

existing foundations or structures the electrical contractor shall etermine<br />

their location and obtain approval of the Engineer-in-charge before cutting<br />

is done.<br />

4.12 At road crossing and other places where cable enter pipe sleeves<br />

adequate bed of sand shall be given so that the cables do not slack and<br />

get damaged by pipe ends after back filling.<br />

4.13 Drum number of each cable from which it is taken shall be recorded<br />

alongwith the cable number in the cable schedule.<br />

4.14 Cables installed above grade shall be run in trays, exposed on walls,<br />

ceilings or structures and shall be run parallel or at right angles to beams,<br />

walls or columns.<br />

Cables shall be so routed that they will not be subjected to heat from<br />

adjacent hot piping or vessels.<br />

4.15 Individual cables or small groups which run along structures/walls etc. will<br />

be clamped by meas of 16 SWG GI saddles on 25 x 6 mm saddle bars.<br />

The cost of saddle and saddle bars shall be deemed to have been included<br />

in the installation of cables and no separate payment shall be made on<br />

this account.<br />

They shall be rightly supported on structural steel masonry, individual or<br />

in groups as required, if drilling of steel must be resorted to, approval<br />

must be secured and steel must be drilled where the minimum weakening<br />

of the structure will result.


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Cables shall be supported so as to prevent unsightly sagging, in general<br />

distance between supports shall be approximately 300 mm for cables upto<br />

25 mm diameter and maximum 450 mm for cables larger than 25 mm dia.<br />

4.16 All G.I. pipes shall be laid as per site requirements. Before fabrication of<br />

various profiles of pipe by hydraulically operated, bending machine (which<br />

is to be arranged by the contractor), all the bars from the pipes shall be<br />

removed. G.I. pipes buries in soil, bitumen coating shall be applied on the<br />

buried lengths. Installation of G.I. pipes shall be undertaken well before<br />

paving is completed and necessary co-ordination will paving agency shall<br />

be the responsibility of Electrical contractor. The open ends of pipes shall<br />

be suitably plugged with G.I. plugs after they are laid in final position G.I.<br />

plugs shall be supplied by the contractor at no extra cost.<br />

4.17 Cable laid on supporting angle in cable trenches, structures, columns and<br />

vertical run of cable trays shall be suitably clamped by means of G.I.<br />

saddles/clamps, whereas cable in horizontal run of cable trays shall be<br />

tied by means of nylon cords.<br />

4.18 Supporting steel shall be painted before laying of cables. The painting<br />

shall be done with one coat of red lead paint and two coats of approved<br />

bituminous alluminium paint.<br />

5.0 TERMINATION:<br />

5.1 All PVC cables upto 1.1KV grade shall be terminated at the equipments by<br />

means of compression type cable lugs of aluminium. They shall have a<br />

gland of screwed nipple with conduit electrical threads and check nut.


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5.2 Power cables shall be identified with red, yellow and blus PVC tapes.<br />

Where copper to aluminium connections are made, necessary bimetallic<br />

washers shall be used. For trip circuit identification additional red ferrules<br />

shall be used only in the particular cores of control cables at the<br />

termination points in the switchgear/control panels and control switches.<br />

5.3 In case of control cables all cores shall be identified at both ends by their<br />

terminal numbers by means of PVC ferrules, or self sticking cable<br />

markers. Wire numbers shall be as per schematic/wiring/inter-connection<br />

diagram. Bidders shall have the samples of PVC ferrules/cable markers<br />

approved before starting the work.<br />

5.4 Where threaded cable gland is screwed into threaded opening of different<br />

size, suitable galvanized threaded reducing bushing shall be used of<br />

approved type, at no extra cost.<br />

5.5 The cable shall be through glands inside the panels or any other electrical<br />

equipment such as motors. The individual cores shall then be dressed<br />

and taken along the cable ways (if provided) or shall be fixed to the<br />

panels with polyethylene straps. Only control cables of single strand and<br />

lighting cables may be directly terminated on the terminals.<br />

In case of termination of cables at the bottom of a panel over a cable<br />

trench having no access from the bottom close fit hole should be drilled in<br />

the bottom plate for all the cables in one line, then bottom plate should<br />

be split in two parts along the center line of holes. After installation of<br />

bottom plate and cables it should be sealed with cold setting compound.<br />

Cables shall be clamped over the open armouring to connect it to earth<br />

bus.


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5.6 Cable leads shall be terminated at the equipment terminals, by means of<br />

crimped type solderless connectors as manufactured by M/s. Dowell<br />

Electro Works or approved equivalent.<br />

Crimping shall be done by hand crimping/hydraulically operated tool and<br />

conducting jelly shall be applied on the conductor. Insulation of the leads<br />

should be removed immediately before the crimping. Conductor surface<br />

shall be cleaned and shall not be left open.<br />

5.7 11, 6.6 and 3.3 KV cables terminations/joints shall be done byu skilled and<br />

experienced jointers duly approved by the owner, if included in the<br />

contract.<br />

6.0 TESTING<br />

6.1 Before energizing, the insulation resistance of every circuit shall be<br />

measured from phase to phase and from phase to ground, This requires<br />

3 measurements if one side is grounded and 6 measurements for 3 phase<br />

circuits.<br />

Where splices or terminations are required in circuits rated above 600<br />

Volts, measure insulation resistance of each length of cable before splicing<br />

and or/terminating. Repeat measurement after splices and/ or<br />

terminations are completed.


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6.2 Measure the insulation resistance of directly buried cable circuits before<br />

cable trenches are back-filled. Repeat measurement after back filling.<br />

6.3 D.C. High voltage test shall be made after installation on the<br />

following:-<br />

1) All 1000 Volts grade cables in which straight through joints have<br />

been made.<br />

2) All cables above 1100 V grade. For record purposes test data shall<br />

include the measure values of leakage current verses time.<br />

The D.C. High voltage test shall be performed as detailed below in<br />

the presence of the Engineer-in-charge or his authorized<br />

representative only.<br />

Cables shall be installed in final position with all the straight<br />

through joints complete. Terminations shall be kept unfinished so<br />

that motors, switchgears, transformers etc. are not subjected to<br />

test voltage.<br />

The test voltage and duration shall be as per relevant codes and<br />

practices of Indian Standard Institution.<br />

7.0 H.T. CABLE LAYING<br />

7.1 CABLES LAID IN BUILT UP TRENCHES :<br />

7.1.1 Cables laid in the built-up trenches within the building shall be raised so<br />

as not to lay at the trench bottom. Cables shall be either secured to the<br />

wall by saddles or laid on angle iron brackets or cable trays, ladders,<br />

rack, trough etc. as approved by <strong>CIDCO</strong>. Where cables are laid on cable


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brackets, the brackets shall not be fixed more than 500 mm. apart to<br />

avoid sag in the cables. Where cables shall be fixed with cable tie or<br />

saddles and shall be at minimum 25 mm. away from side walls and<br />

minimum 150 mm distance shall be observed between two adjacent<br />

cables.<br />

7.1.2 The dimensions of the trenches shall be determined depending upon the<br />

maximum number of cables that is expected to be accommodated.<br />

Wherever specified, trenches shall be filled with fine sand and covered<br />

with RCC or steel chequered trench covers.<br />

7.2 DUCT SYSTEM :<br />

Wherever specified cables shall be laid in underground ducts. The duct<br />

system shall consist of required number of reinforced hume pipes with<br />

simplex joints. The ducts shall be properly anchored to prevent any<br />

movement. The top surface of the cable ducts shall not be less than<br />

100 mm below the ground level. The ducts shall be provided with<br />

inspection manholes at all direction changes and at required regular<br />

intervals of 50 mtr. for drawing the cables. The manholes shall be at<br />

reinforced concrete either cast-in-situ or precast. The manhole covers<br />

shall be RCC cover of suitable weight to withstand the load of the road<br />

vehicle. The ducts shall be properly plugged at the ends to prevent<br />

entry of water, rodents etc. Suitable duct markers shall be placed along<br />

the run of the cable ducts. The duct markers shall be at least be 15<br />

cms. square embedded in concrete, indicating the voltage, number of<br />

ducts and direction of run of the cable be provided in the manholes for<br />

supporting the cables. Proper identification tags shall be provided for<br />

each cable in the manholes.


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7.3 CABLE TRENCHES (EXCAVATED):<br />

7.3.1 The cable trenches shall be excavated 1000 mm below the finished<br />

ground level and shall have a minimum width of 300 mm. for laying of<br />

single cable. When more than one cables are laid in the same trench,<br />

the width of the trench shall be increased such that the spacing<br />

between the cables is 25 cms. and the end cables are at minimum 15<br />

cms. from the side of the trenches. At the turning of the cable route<br />

the trench shall be dug with radius equal to 15 times the cable<br />

diameter.<br />

7.3.2 The trenches shall be cut square with vertical side walls and with<br />

uniform depth. Suitable shoring and propping may be done to avoid<br />

caving in of trench walls. The floor of the trench shall be rammed and<br />

leveled. The bottom of the cable trench shall be prepared with 100mm.<br />

sand bed for laying the cables.<br />

7.3.3 The cables shall be laid in trenches over the rollers. After the cable is<br />

laid and straightened it shall be covered with sand, and RCC half<br />

round/semi circular pipe of appropriate strength & size.<br />

7.3.4 The cable trench then shall be refilled with excavated materials after<br />

removing the stones and other sharp materials and the refilled materials<br />

shall be compacted with light ramming.<br />

7.3.5 Approved cable markers made of G.I. with 15 cms crown shall be<br />

provided along the route of cables at a spacing of 40 – 50 meters and<br />

also at both ends of road crossings or at the cable turning points. The<br />

class, type and No. of cables shall be indicated on the markers.


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7.3.6 Cable shall be laid in hume pipes at all road crossings and in GI pipes at<br />

the wall entries.<br />

7.4 CABLE JOINTING :<br />

7.4.1 Cable jointing shall be done as per the recommendations of the cable<br />

manufacturer. Jointing shall be done by qualified cable jointer. The<br />

location of the cable joint shall not be where the cable takes a bend also<br />

where the soil is loose and shows signs of subsidence.<br />

7.5 CABLE TERMINATION :<br />

7.5.1 All cable termination shall be done in cable end box provided in RMU,<br />

Transformer or any other H.T. equipment.<br />

7.5.2 Cable terminations are to be made with cable heat shrinkable<br />

termination kits of specified approved make only.<br />

7.5.3 Every connection at a cable termination shall be mechanically and<br />

electrically sound and protected against mechanical damage and any<br />

vibration liable to occur shall not impose any harmful mechanical<br />

damage to the cable conductor.<br />

7.6 TESTING <strong>OF</strong> CABLE BEFORE LAYING AND COMMISSIONING :<br />

7.6.1 All tests shall be carried out in accordance with relevant IS codes of<br />

practice, IE rules.


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7.6.2 100% cable drums shall be checked for continuity and cross continuity<br />

tests to ensure that there is no internal damage to the cable during<br />

transportation.<br />

7.6.3 Installation resistance shall be measured with 1000 V megger between<br />

the cores and all the cores to earth (armour) and results shall be<br />

recorded.<br />

7.6.4 Before cable jointing is done, cable shall be tested for presence of<br />

moisture by dipping a piece of insulation of cable in hot compound of<br />

paraffin was at temperature between 120 –140 degree centigrade. The<br />

presence of moisture is indicated by the formation of bubbles. Only a<br />

single strip of insulation gripped by a pair of tweezers should be used.<br />

7.6.5 After the cables are installed before commissioning it shall be tested for<br />

high DC voltage test. The recommended volts and duration of the test<br />

shall be as per I.E. rules & regulations. However the test voltage and<br />

duration shall be in conformity with standards of local supply<br />

authorities. During high voltage tests all electrical equipments related<br />

to the cable installation must be earthed and adequate clearance shall<br />

be maintained from the other equipments and from work to prevent<br />

flash over.<br />

_______________________ _______________________<br />

Stamp and signature of<br />

Contractor<br />

Addl. Chief Engineer (II)<br />

Date :<br />

Date :


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CODES AND STANDARDS<br />

The following codes and standards shall be applicable for continuous<br />

performance of all electrical equipments to be supplied, delivered at site,<br />

erected, tested and commissioning. The electrical equipments offered<br />

shall comply to the relevant Indian Standards Specifications. Fire<br />

Insurance Regulations, Tariff Advisory Committee Regulations, and<br />

particular to Indian Electricity Rules in all respect with all its latest<br />

amendments upto date.<br />

For guidelines to the tenderers, few of the Indian Standards are indicated<br />

below :-<br />

1. IS:116 - Circuit breakers for AC System.<br />

2. IS:159 - Bubars and Busbars connections.<br />

3. IS:3043 - Code of practice of earthing.<br />

4. IS:10116 - Code of practice for installation of<br />

switchgear.<br />

5. IS:10116 - Code of practice for selection,<br />

installation and maintenance of<br />

fuse (upto 650 Volts.)<br />

6. IS:3165 - Potential Transformers.<br />

7. IS:3203 - Climate proofing of electrical<br />

equipments.<br />

8. IS:3427 - Metal enclosed switchgear and<br />

central gear.<br />

9. IS:3419 - Specification for fittings for rigid PVC<br />

non-metallic conduit.<br />

10. IS:3537 - Gas separated relays.<br />

11. IS:3639 - Fittings and accessories for power<br />

Transformer.


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12. IS:3837 - Accessories for rigid steel conduits.<br />

13. IS:4064 - Heavy duty Air Break switches and<br />

composite. Switch fuse units for<br />

voltage and exceeding 100V.<br />

14. IS:4064 - Switch fuse units for Industries etc.<br />

15. IS:4237 - General requirements for switchgears<br />

not exceeding 1000 Volts.<br />

16. IS:4615 - Switch socket outlet.<br />

17. IS:5133 (Part-I) - Sheet steel boxed.<br />

18. IS:3070 (Part-I) - Lighting Are stores.<br />

19. IS:2034 - L.T. capacitors.<br />

20. IS:192 - Electric power switchgear for indoor<br />

and outdoor installation.<br />

21. IS:PUB 26 - Circuit Breakers.<br />

22. IS:9535 - Specification for conduits for electrical<br />

installation.<br />

23. IS:240 (Part-I & II) - for H.T. insulator of 33KV grade and<br />

above.<br />

24. IS:335 - Insulating Transformer Oil.<br />

25. IS:374 - Ceiling fans.<br />

26. IS:375 - Marking and arrangement for switchgear<br />

boards main connections auxiliary wiring<br />

27. IS:415 - Tungsten filament lamps.<br />

28. IS:692 - Paper insulated cables.<br />

29. IS:694 - PVC insulated cables and cords for<br />

power lighting.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

30. IS:722 - Three phase watt hour meters with MDI<br />

31. IS:732 - Electrical wiring installation (upto 650V)<br />

32. IS:1087 - Single pole tumbler switch 5 Amps.<br />

33. IS:1248 - Direct reading electrical indicating<br />

instruments.<br />

34. IS:1255 - installation and maintenance of paper<br />

insulated power cables upto 33 KV)<br />

35. IS:1293 - 3 Pin lugs and sockets outlets.<br />

36. IS:1554 - PVC insulated cables – heavy duty.<br />

37. IS:1567 - Metal clad switches upto 100 Amps.<br />

38. IS:1651 - Lead acid cell batteries.<br />

39. IS:1653 - Rigid steel conduits for electric wiring.<br />

40. IS:1771 - Industrial light fittings with accessories.<br />

41. IS:6600 - Loading of oil immersed transformer.<br />

42. IS:6946 - Reliable (flexible) non-metallic conduits<br />

for electrical.<br />

43. IS:7098 (Part-II) - For XLPE type cables.<br />

44. IS:5216 - Guide for safely procedure and practices<br />

in electric work.<br />

45. IS:5578 - Guide for marking of insulated<br />

conductors.<br />

46. IS: 5792 - 11 kv drop out fuses.<br />

47. IS:5820 - Pre-cast concrete cables covers.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

48. IS:5908 - Method of measurement of electrical<br />

installation in building.<br />

49. IS:6381 - Specifications for construction and<br />

testing of electrical apparatus.<br />

50. IS:1818 - Isolation and earthing switches.<br />

51. IS:1886 - Code practice for installation of<br />

transformers.<br />

52. IS:1947 - Flood lights.<br />

53. IS:2026 - Transformers.<br />

54. IS:9242 - Degree of protection provided for<br />

enclosure for switchgear.<br />

55. IS:9242 - HRS cartridge fuse units upto 650 Volts.<br />

56. IS:2251 - Code of practice for Danger Notice<br />

Plates.<br />

57. IS:2268 - Code bell/buzzers.<br />

58. IS:2274 - Code of practice for wiring installation<br />

(exceeding 650 Volts)<br />

59. IS:3854 - Switches for domestic and similar<br />

purpose.<br />

60. IS:2312 - Exhaust fans.<br />

61. IS:2309 - Code of practice for lighting protection.<br />

62. IS:2418 - Tubular fluorescent lamps for general<br />

lighting service.<br />

63. IS:2544 - Porcelain post top insulators for BBW<br />

Class.<br />

64. IS:2509 - PVC electrical conduits.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

65. IS:2516 - A.C. Circuit breakers.<br />

66. IS:2667 - Fittings for rigid steel conduits for<br />

electrical wiring.<br />

67. IS:2692 - 11 KV drop out fuses.<br />

68. IS:2575 - Enclosed distribution fuse boards and<br />

cutouts for voltage upto 1000 V.<br />

69. IS:2705 - Current transformer.<br />

70. IS 14930 II - Double Walled Corrugated pipes of High<br />

Density Polyethylene (HDPE) with<br />

couplings, tees, sockets for cable<br />

protection.<br />

The entire electrical installation work shall be strictly complied with the codes,<br />

standards, rules and regulations framed under the Indian Electricity Act. Further<br />

it shall be strictly carried out as per the regulations and rules set out by “Tariff<br />

Advisory Committee and/or Fire Insurance Regulations”.<br />

Some of the rules framed under the Indian Electricity Rules, 1956 and all<br />

amendments thereof more particularly complied to :<br />

35, 43, 44, 44-A, 45 (Part), 50, 51, 59, 61 (a), 61 (c), 62, 63 (2), 65, 66, 67, 68,<br />

69 and 92(2).<br />

_______________________ _______________________<br />

Stamp and signature of<br />

Contractor<br />

Addl. Chief Engineer (II)<br />

Date :<br />

Date :


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

LIST <strong>OF</strong> APPPROVED MAKES <strong>OF</strong> ACCESSORIES FOR<br />

<strong>ELECTRICAL</strong> <strong>WORK</strong>S<br />

Sr.<br />

No.<br />

Particulars<br />

Makes<br />

1. Submersible Pump /Monoblock Crompton Greaves, Aqua, Kirloskar,<br />

pumps<br />

Mather & Platt, Modi, KSB, Kishor,<br />

Flowmore, ABS, Grundfos, Flygt<br />

Universal Engineers.<br />

2. Ring Main Unit/HT switches & Fuse MEI, Southern, Andrew Yule.<br />

unit<br />

3. C.T./P.T. MSEB approved/Hupken<br />

4. Auto Transformer starter MEI, Kilburn, JMP, Siemens, Andrew<br />

Yule, GEC, KEC<br />

5. Trivector Meter MSEB approved<br />

6. Measuring Instruments IMP, AE, UE, MECO, FE, Rishline<br />

(L&T), Ashida<br />

7. Current transformer AE, Gilbert & Maxwell, IMP, Siemens<br />

8. PVC Conduits, PVC Pipes, DWC<br />

DHPE pipes<br />

SEGC (C.S), Pragati<br />

Garware, Pricision, Circlearc, Popular,<br />

Prince, Shaktiman, REX Polyextrusion<br />

<strong>Ltd</strong>. Premium Pipes and fittings,<br />

Madhu Plast.<br />

Usha, Crompton, Bajaj, Cinni, Rallies,<br />

9. Ceiling/Table Fans/ Air<br />

Circulators<br />

Orient, Polar, Almonard, Alfa.<br />

10. G.O.D. Switches & Dropout fuse Kiran, Pactil, Atlas, Cona Industries,<br />

Outfit<br />

Leader Electricals, Elle Electricals<br />

11. Chain Pulley Block Elephanta, Herculas, WMI<br />

12. Sluice Valve Kirloskar, IVC<br />

13. Butterfly Valve Forbes, IVC<br />

14. Lugs Dowels, Lotus, A.G. Electricals<br />

15. C.I. Pipes Tisco, Sail, Damodar, Shivdurg.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

Sr.<br />

No.<br />

Particulars Makes<br />

16. Chlorinator Penwalt, Shree Mitra Purification<br />

17. Motor Protection Relays Universal, Thresold, E.E., Minilac,<br />

Siemens, C.S. Telemechanique, Indo-<br />

Asian, L&T, Ashidha Electronics Pvt.<br />

<strong>Ltd</strong>.<br />

18. 11KV cable/ 22KV cable CCI, Tropodur, Asian, Nicco, ICL,<br />

Gloster, Torrent, Polycab, HVP, Plaza<br />

19. Feeder Pillar/ Mini pillar Popular Brass Metal works, Anil Elect.<br />

Ind. Manish, Super or any other<br />

manufacturer approved by Dept.<br />

20. Transformer Indo Tech Transformers, Kirloskar,<br />

Emco, Bharat Bijlee, Crompton,<br />

BSES, Andrew Yule, Pactil, NGEF<br />

Delta, KEL, Sharun, Tesla, Argus.,<br />

Tesla<br />

21. PVC Insulated 1.1kV cable Plaza Cables, Havells’ India <strong>Ltd</strong>.,<br />

Vardhaman Cables (Bharat Cab), R.K.<br />

Kables <strong>Ltd</strong>., Revin cable <strong>Ltd</strong>., Fixolite<br />

Wires and Cables, Macro Cables Pvt.<br />

<strong>Ltd</strong>., Dasmesh Cables, Leader<br />

Electricals (Leader Leacab), Gemscab<br />

Industries <strong>Ltd</strong>., Polycab, RPG<br />

22. XLPE – LT cables Plaza Cables, Vardhaman Cables<br />

(Bharat Cab), Ravin cable <strong>Ltd</strong>.,<br />

Macro Cables, Fixolite Wires and<br />

Cables, Dasmesh Cables, Central<br />

cable <strong>Ltd</strong>., Gemscab Industries <strong>Ltd</strong>.,<br />

Polycab, RPG<br />

23. XLPE – HT Cables Torrent Cables, Plaza Cables, Revin<br />

cable <strong>Ltd</strong>., Central Cable <strong>Ltd</strong>.,<br />

Polycab, RPG<br />

24. PVC insulated 1.1kV (HD) cable. Plaza Caes, Vardhaman Cables<br />

(Bharat Cab), Havell’s India <strong>Ltd</strong>.,<br />

R.K. Kables <strong>Ltd</strong>., Macro Cables,<br />

Dasmesh Cables, Central Cable <strong>Ltd</strong>.,<br />

Gemscab Industries <strong>Ltd</strong>., Polycab


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

Sr.<br />

No.<br />

Particulars Makes<br />

25. PVC insulated 11kV (HD) cable. Havell’s India <strong>Ltd</strong>., Central Cable <strong>Ltd</strong>.,<br />

26. MCB, ELCB, RCCB Indo Asian Fuse Gear,Standard<br />

Electrical, Leader Electricals (Leader<br />

Aplha Brand), Esprit Switchgear <strong>Ltd</strong>,<br />

Indiana Current Co troll (Versatrip<br />

brand), Datar, L&T<br />

27. MCCB Standard Electrical, Spaceage<br />

28. Isolators/ Disconn-ectors, LV<br />

Switchgears, Esprit Switchgear <strong>Ltd</strong>.,<br />

Datar, L&T, Indo Asian<br />

Standard Electrical, Kilburn<br />

Switch gear/ Switch fuses<br />

29. Distribution Board Indo Asian Switchgear, Standard<br />

Electrical, Esprit Switchgear <strong>Ltd</strong>.,<br />

Indiana Current Control (Versatrip),<br />

Super<br />

30. HRC Fuses & bases Indo Asian Switchgear, Havell’s India<br />

<strong>Ltd</strong>., R.B. Commercial Corporation<br />

31. Compact Floures- cent Lamps Indo Asian Fuse gear<br />

32. Alternate Circuit Breaker (acb) Spaceage Switchgears.<br />

33.<br />

PVC Wires, Copper Aluminium<br />

Conductor, flexible cables<br />

Philco, Plyroflux, Paragon, Phenolex,<br />

Delta., Polyplast, Sundeep, V-Plast,<br />

Apex, Silvex, Pagoda, Sapcecab,<br />

HMT, Ralicab, Finolex.<br />

34. Fuse switches/ SW fuse L&T, Siemens, Crompton,<br />

Telemechanique. Indo-Asian, Havells,<br />

EE, HH-ELCON, Standard, KEW, Kalki,<br />

Sentinel, Stenly., Samrat<br />

35. Switches/Sockets Kalki, CPL, Anchor, Precission, MK,<br />

HME, EEW.<br />

36. Cable Glands HME, EEW,<br />

37. HC Fuse Distribution Board CPL, EE, Stenly, KEW, Kalki, EE,<br />

Standard.<br />

38. Air/Oil Circuit Breakers (HT/LT) Kilburn, Easun, MEI, Jyoti, Andrew<br />

Yule, Siemens, L&T, GEC, Southern,<br />

BHEL, Telemechanique, Crompton.<br />

39. Energy Meters Jaipur.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

Sr.<br />

No.<br />

Particulars Makes<br />

40. Capacitor GEC, Khatau-Junkar, Crompton, L&T,<br />

Madhav, Atlanta, Prabhodhan,<br />

41. Steel tubular Poles<br />

Maladay, Aison (S+M), Samrat.<br />

Indian Electric Poles, Bombay Tubes,<br />

Nityanand, Rajan Tubes.<br />

42. GI Octagonal Poles Zenith, Tata, Bharat, Bajaj, Saino/<br />

Senzo Engg. Pvt. <strong>Ltd</strong>., Jenco<br />

43.<br />

Industrial Corpn, Shah Pylon, Philips.<br />

Terminal Box, Bracket, Junction ELM, United, DVK, Locally fabricated<br />

Box, control pillar.<br />

as per <strong>CIDCO</strong>’s approved drawing/<br />

specifications.<br />

Abak Electricals.<br />

44. Street light Luminaries Bajaj, Crompton, Philips, Genlec,<br />

45. Chokes/Ignitors/ Electronic<br />

Keselec, ELM, Mysore, Wipro, GE-<br />

Apar, Canara, Glolite, ECE, Indo-<br />

Asian.<br />

Vallient Electricals Pvt. <strong>Ltd</strong>., Fixolite<br />

Industrires.<br />

Bajaj, Crompton, Philips, Genelec,<br />

Ballast<br />

Keselac, GE-Apar, Glolite, ECE, Indo-<br />

Asian.<br />

Fixolite Industries, Madhu Gupta &<br />

Associates Pvt. <strong>Ltd</strong>.<br />

46. Power contactors L&T, Siemens, Bharticulter, Hammer,<br />

Telemechanique, HH-ELCON,<br />

47. Lamps<br />

Standard, Kirloskar, Crompton, CS.<br />

Bajaj, Crompton, Philips, Cema, HMT,<br />

Electron, Surya, Mysore, Sylvania-<br />

Laxman, Solarson, ECE, Indo-Asian.<br />

Solarson, ECE, Indo-Asian<br />

48. Rotary/Select or Switches L&T, Siemens, Kaycee, EE, Bisons<br />

(ELM)<br />

49. Post top Lantern Philips, Crompton, Glolite, Bajaj,<br />

Parimal, Tulip, Kesselec, ECE,<br />

Genelec, ELM, Wipro, Indo-Asian.<br />

50. Street Light controller/ Timer L&T (TSQ 100) 24 Hrs. Dial, ELM.


<strong>CIDCO</strong> <strong>OF</strong> MAHARASHTRA LTD<br />

C.A.No.03/<strong>CIDCO</strong>/EE(Elect)/2011-12 Sr. Page No.<br />

Sr.<br />

No.<br />

Particulars Makes<br />

51. ACSR Conductors V.K. Industries, Smita Conductors,<br />

Bombay Conductors Straight, Galada,<br />

Sterlite.<br />

52. Alternators Kirloskar, Jyoti, NGEF, AVK-SEGC,<br />

KEL, Cater Pillar, Stmford, C.G.,<br />

53. Diesel Engines<br />

Newage Elect. <strong>Ltd</strong>.<br />

Kirloskar, Greaves Cotton, Cummins,<br />

Ashok Leyland, Cater piller.<br />

54. Flow meters Signet, Monetek, Voryex.<br />

55. Cable Jointing kit UNCIL SYNCHEM, Raychem, Xicon,<br />

Benson, Mahindra (Push on) M-Seal.<br />

56. Pole paint Jehnson & Nicholson, Asian (s+M),<br />

Nerolac.<br />

57. Flourescent Fixtures Bajaj, Crompton, Philips, GEC,<br />

Genelec, Mysore, Wipro, Glolite,<br />

Litwell, ECE, Prestolite, Indo-Asian.<br />

58. Elevators Shindler India <strong>Ltd</strong>, Escon Elevators<br />

<strong>Ltd</strong>.<br />

59. Energy Saver Device Prithvi Technology Pvt. <strong>Ltd</strong>.<br />

_______________________ ________________________<br />

Stamp and signature of<br />

Contractor<br />

Addl. Chief Engineer (II)<br />

Date :<br />

Date :

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