SCOPE OF WORK (ELECTRICAL) - CIDCO Maharashtra Ltd.

More documents

Recommendations

Info

CIDCO OF MAHARASHTRA LTD C.A.No.03/CIDCO/EE(Elect)/2011-12 Sr. Page No. brackets, the brackets shall not be fixed more than 500 mm. apart to avoid sag in the cables. Where cables shall be fixed with cable tie or saddles and shall be at minimum 25 mm. away from side walls and minimum 150 mm distance shall be observed between two adjacent cables. 7.1.2 The dimensions of the trenches shall be determined depending upon the maximum number of cables that is expected to be accommodated. Wherever specified, trenches shall be filled with fine sand and covered with RCC or steel chequered trench covers. 7.2 DUCT SYSTEM : Wherever specified cables shall be laid in underground ducts. The duct system shall consist of required number of reinforced hume pipes with simplex joints. The ducts shall be properly anchored to prevent any movement. The top surface of the cable ducts shall not be less than 100 mm below the ground level. The ducts shall be provided with inspection manholes at all direction changes and at required regular intervals of 50 mtr. for drawing the cables. The manholes shall be at reinforced concrete either cast-in-situ or precast. The manhole covers shall be RCC cover of suitable weight to withstand the load of the road vehicle. The ducts shall be properly plugged at the ends to prevent entry of water, rodents etc. Suitable duct markers shall be placed along the run of the cable ducts. The duct markers shall be at least be 15 cms. square embedded in concrete, indicating the voltage, number of ducts and direction of run of the cable be provided in the manholes for supporting the cables. Proper identification tags shall be provided for each cable in the manholes.
CIDCO OF MAHARASHTRA LTD C.A.No.03/CIDCO/EE(Elect)/2011-12 Sr. Page No. 7.3 CABLE TRENCHES (EXCAVATED): 7.3.1 The cable trenches shall be excavated 1000 mm below the finished ground level and shall have a minimum width of 300 mm. for laying of single cable. When more than one cables are laid in the same trench, the width of the trench shall be increased such that the spacing between the cables is 25 cms. and the end cables are at minimum 15 cms. from the side of the trenches. At the turning of the cable route the trench shall be dug with radius equal to 15 times the cable diameter. 7.3.2 The trenches shall be cut square with vertical side walls and with uniform depth. Suitable shoring and propping may be done to avoid caving in of trench walls. The floor of the trench shall be rammed and leveled. The bottom of the cable trench shall be prepared with 100mm. sand bed for laying the cables. 7.3.3 The cables shall be laid in trenches over the rollers. After the cable is laid and straightened it shall be covered with sand, and RCC half round/semi circular pipe of appropriate strength & size. 7.3.4 The cable trench then shall be refilled with excavated materials after removing the stones and other sharp materials and the refilled materials shall be compacted with light ramming. 7.3.5 Approved cable markers made of G.I. with 15 cms crown shall be provided along the route of cables at a spacing of 40 – 50 meters and also at both ends of road crossings or at the cable turning points. The class, type and No. of cables shall be indicated on the markers.
Page 1 and 2: CIDCO OF MAHARASHTRA LTD C.A.No.03/
Page 29: CIDCO OF MAHARASHTRA LTD C.A.No.03/
Page 43: CIDCO OF MAHARASHTRA LTD C.A.No.03/

SCOPE OF WORK (ELECTRICAL) - CIDCO Maharashtra Ltd.

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?