PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
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For long run, junction/pull boxes shall be provided at suitable intervals to facilitate<br />
wiring. Conduits shall be securely fastened to junction box or cabinets, each with a<br />
locknut and insulated bushing inside the box and locknut outside. Conduit joints and<br />
connections shall be made thoroughly water-tight and rust-proof by application of a<br />
thread compound, which will not insulate the joints. The entire metallic conduit<br />
system, whether embedded or exposed, shall be electrically continuous and<br />
thoroughly grounded.<br />
Lighting fixture shall not be suspended directly from junction box in the main conduit<br />
run. Conduits and fittings shall be properly protected during construction period<br />
against mechanical injury. Conduits ends shall be plugged or capped to prevent entry<br />
of foreign material.<br />
In control rooms and office areas provided with false ceiling conduct run shall be<br />
concealed type, embedded in the walls.<br />
Wiring :<br />
Wiring shall be generally carried out by PVC wires in conduits. All wires in a conduit<br />
shall be drawn simultaneously. No subsequent drawing is permissible. Wire shall not<br />
be pulled through more than two equivalent 90` bends in a single conduit run. Wiring<br />
shall be spliced only at junction boxes with approved type connections or terminal<br />
strips. Maximum two wires can be connected to each way of the terminal block.<br />
Splicing of only one phase shall be done in a junction box.<br />
For lighting fixtures, connection shall be teed off through suitable round conduit or<br />
junction box, so that the connection can be attended without taking down the fixture.<br />
For vertical run of wires in conduit, wires shall be suitably supported by means of<br />
wooden/hard rubber plugs at each pull/ junction box. A.C. and D.C. circuits shall not<br />
be run in the same conduit and junction boxes. Receptacle circuits shall be kept<br />
separate and distinct from lighting and fan circuits.<br />
Separate neutral wire shall be provided for each circuit. Wiring throughout the<br />
installation shall be such that there is no break in the neutral wire in form of switch or<br />
fuse.<br />
DTS : Detailed Tender Specification. Page 217
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