Specifications

167
NLUO PMC CONTRACTOR
SIGNATURE AND SEAL SIGNATURE AND SEAL SIGNATURE AND SEAL
horizontal run, but on other side of couplers or bend or similar fitting saddles shall be fixed at distance of 30 cm from the
center of such fittings. The minimum thickness for saddles shall be 24 SWG, for conduits upto 25 mm dia and 20 SWG for
larger sizes.
6. Bends in conduits :
All necessary bends in the system including diversion shall be done bending the pipes, or by inserting suitable inspection type
bends, elbows or similar fittings, or by fixing cast iron inspection boxes whichever is most suitable.
7. Outlets :
All outlets for fittings, switches etc. shall be fixed on boxes of suitable metal for either surface mounting system or flush
mounting system. In case of cast iron boxes the wall thickness shall be at least 3 mm and in case of welded mild steel sheet box
of wall thickness shall not be less than 16 gauge. Except where otherwise stated 3 mm thick insulated laminated sheets shall be
fixed on the front with screws. Where conduits are terminated. Special care shall be taken in employing double jamnuts,
special care shall be taken in employed double jamnuts, for securely fixing conduits to outlets so as to prevent any possibility
of damages to cables when drawn.
8. Cables to be used :
Unless stated otherwise only single core PVC insulated cables of approved manufacturers shall be used for wiring in conduit
shall not be greater than maximum set out in Table II of Indian Standard (I.S. 732-1963) code or practice (revised) for
electrical wiring installation (system voltage not exceeding 650 volts).
9. Looping in system :
Distribution wiring in conduit to light, fan plug points etc. shall be done in looping system. In this system no joints or
connections shall be made anywhere of the system except at terminating points such as at terminals of switches, ceiling roses,
etc. and in case of socket outlets at the socket terminals.
10. Earthing continuity wires :