GAIL (India) Limited

6Ceiling rose: a) A ceiling rose or any other similar attachment shall not be used on circuit, the voltage of whichnormally exceeds 250 volts.A ceiling rose shall not embody fuse terminals as an integral part of it.Every socket outlet shall be controlled by a switch. The switch controlling the socket shall be on the ‘live’side of sideline. 5 Amps and 15 Amps socket-outlet shall normally be fixed at any convenient place 60 cmabove the floor level or near such level as indicated in drawing. 15 Amps socket outlets in kitchen shall befixed at convenient place 23cm above the working platform. In a room containing a fixed bath or shower,there shall be no socket outlet and there shall be no provision for connecting a portable appliance.5 Recessed conduit wiring systema) Making of chase the chase in the wall shall neatly be made and shall be of suitable dimension to permitthe conduit to be fixed in the manner desired by the Engineer-in-charge. In the case of buildings underconstruction, chases shall be provided in the wall, ceiling, etc. at the time of their construction and shallbe filled up neatly after erection of conduit and brought to the original finish of the wall.b) Fixing of conduit in chase: The conduit shall be fixed by means of staples or by means of saddles notmore than 600 mm apart. Fixing of standard bends or elbows shall be avoided as far as practicable and allcurves maintained by bending the conduit pipe itself with a long radius, which will permit easy drawinginof conductors. All the threaded joints of rigid steel conduits shall be treated with approved preservativecompound to ensure protection against rust.c) Inspection boxes: To permit periodical inspection and to facilitate replacement of wires, suitableinspection boxes shall be provided at convenient locations. They shall be mounted in flush with the wall.The minimum size of inspection boxes shall be 75 x 75 mm. suitable ventilating holes shall be provided inthe inspection box covers.d) Types of accessories to be used. All outlets such as switches and sockets may be either of flush mountingtype or of surface mounting type.The switches and other’ outlets shall be mounted on such boxes The metal box shall be efficiently earthedwith the earth continuity wire run along the conduit.When crossing through expansion joints in buildings, the conduit sections across the joint may be throughflexible copper bellows of the same size as MS conduit. The Number of wires that can be drawn though aconduit shall be strictly as per IS 732 and as mentioned in Drawings6 Conduits:MS conduit shall he black enameled and of thickness not less than 16 SWG and of size minimum 19 mmdia. The Conduit shall conform to IS 95377 Part IIBunching of cables: Separate conduits shall be used for bunching of conductors of AC supply and DCsupply for lighting and small power outlet circuits.All outlets of conduit systems shall be properly drained and ventilated, but in such a manner so as toprevent the entry of insect’s etc. as far as possible.Bends in conduit:Wherever necessary, bends or diversions may be achieved by bending theconduits or by employing normal bends, inspection bends, inspection boxes,elbows or similar fittingsIn case of plain conduit, heat may be used to soften the conduit for bending and forming joints.Positioning of conduit in close proximity to hot surfaces should be avoided.