SCOPE OF WORK (ELECTRICAL) - CIDCO Maharashtra Ltd.
SCOPE OF WORK (ELECTRICAL) - CIDCO Maharashtra Ltd.
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.
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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.
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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
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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 />
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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.
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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.
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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.
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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.
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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.
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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 />
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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.
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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 />
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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.
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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
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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 />
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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.
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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 :