Specifications

NLUO PMC CONTRACTOR

SIGNATURE AND SEAL SIGNATURE AND SEAL SIGNATURE AND SEAL

(ii) PVC / Polythene-Medium gauge pipes of reputed make having 3 mm wall thickness shall be used.

For roof slabs - These shall be prelaid during casting of floor / roof slab. No. of wires drawn through the same shall not

exceed the number of specified I.S. code.

For vertical drops in wall to switch boards-Minimum size shall be 13 mm bore through which not more 2 Nos. 1/1-40 and G.I.

earth wire shall be drawn.

(iii) Maximum capacity of conduits for Tendered Drawing in of PVC insulated cables shall be as follows :

650 / 1100 V PVC In 20 mm dia. In 25 mm dia.

Copper wire. Conduits. Conduits.

1.5 Sqm. 4 Nos. 10 Nos.

2.5 Sqm. 4 Nos. 10 Nos.

4.0 Sqm. 3 Nos. 8 Nos.

6.0 Sqm. 2 Nos. 6 Nos.

10 Sqm. - 4 Nos.

16 Sqm. - 2 Nos.

7. Fish wire - 18 SWG G.I. wire shall be used and it shall protrude the conduit ends by 9 inches.

8. Conduit laying in floor / roof slabs before casting :

PVC / Ploythene / G.I. conduit shall be laid straight as far as practicable and properly placed including binding with the steel

reinforcement rods with 22 SWG G.I. wire so that proper positions of conduits are maintained.

While laying the conduits for concealed wiring in the ceiling or in the beams and columns and before casting, the contractor

shall ensure that both ends of the conduit are plugged by means of dead-end socket or otherwise so that any foreign matter

cannot enter the conduit and choke them.