PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

A conductor shall be carried in an approved heavy gauge solid drawn or lap welded
conduit or in a porcelain tube of such a size that it permits easy drawings in. The
ends of conduit shall be neatly bushed with porcelain, wood or other approved
material.
Where a wall tube passes outside a building so as to be exposed to weather, the
outer end shall be well mounted and turned downwards and properly bushed on the
open end.
Fixing to walls and ceiling:
Plug for ordinary walls or ceiling shall be of well seasoned teak or other approved
hard wood not less than 5 cm. long by 25 cm. sq. on the inner and 2 cm. sq. on the
outer end. They shall be cemented into walls within 6.5 mm of the surface the
remainder being finished according to the nature of the surface with plaster.
Where owing to irregular coarsing or other reasons the plugging of the walls or
ceiling with wood plugs present difficulties, the wood casing, wood batten or metal
conduit shall be attached to the wall or ceiling in an approved manner. In the case
of white washing. Plugging of walls or ceiling can be done in a better way where
neatness is the first consideration. In all such case approver type of asbestos or
fiber fixing plug (Rawl or Phil plug) with correct size of tees shall be used and done
in a workman like manner. Were this cannot be done, wooden plugs as described
can be used with special permission of the Engineer.
Fittings:
Lights, fans and sockets outlets shall be so located as to provide maximum comfort
to the occupant and to enable him to utilise the electricity in the most economical
manner.
Where conductors are required to be drawn through tube or channel leading to the
fitting, the tube or channel must be free from sharp angles or projecting edges.
Non-flammable shade form a part of a light fitting against all risks or fire, celluloid
shade or light fitting shall not be used under any circumstances. Vitreous enameled
iron shade shall be of size 250mm x 90mm (nominal) size with a tolerance to
5mm). Plastic shade shall not be generally used in the fittings suitable for
incandescent lamp.
GTS : General Technical Specification. Page 125