RAJASTHAN CO-OPERATIVE DAIRY FEDERATION LIMITED

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44.2 Conduits or pipes shall run along walls, floors and ceilings, on steel
supports, embedded in soil, floor, wall or foundation, in accordance with
relevant layout drawings, under ground portions of conduit installation to be
embedded in the foundation or structural concrete shall be installed in close coordination
with collateral work. Exposed conduit shall be neatly run and evenly
spaced, with conduits parallel when in racks or in banks. Conduits embedded in
foundation or structural concrete shall be run as directly as possible among
with generally indicated route between two points with a minimum length and
with a minimum of crossing bending and cutting but without creating
interferences with other installations.
44.3 When two lengths of conduits are joined together through a coupling, running
threads equal to twice the length of coupling shall be provided on any one
length to facilitate easy dismantling of the two conduits whenever required.
44.4 When one or more cables are drawing through a conduit, cross sectional area of
the cables shall be 40% of the internal cross sectional area of the conduit.
44.5 Conduits and accessories shall be adequately protected against mechanical
damage as well as corrosion.
45.0 Earthing :
45.1 The scope of supply and installation should also include absolutely
independent double earthing of individual electric motors, control gears and
switchboards, complete with necessary copper/GI wire, copper strip, earthing
plate, top funnel, salt, cola etc. The earthing process include digging of
earthing pit, filling the same with alternative layers of coal and salt, refilling
the pit and providing perforated GI pipe making housing pit and cover as per
IER & ISI code of practice No. ISI:3034-1966.
45.2 Erector shall install bare/insulated aluminium/GI Cables and strips, etc.
required for system and individual equipment earthing. All work such as
cutting, bending, supporting soldering, coating drilling, brazing, clamping,
bolting and connecting into structures, pipes, equipment frames, terminals, rails
or other devices shall be in Erector‟s scope of work. Unless otherwise
specified, the excavation and trenching shall be done by Erector. Erector shall
also backfill and reinstate the trenches after installation of earthing conductors.
45.3 Earthing shall conform to the Indian Standard Code of practice IS:3043 and
Indian Electricity Rules, 1956. All materials and fittings used in the earthing
installation shall conform to the relevant Indian Standards or approved by
RCDF‟s Engineer. Any change in routing, size of conductors etc. shall be
subject to the prior approval of RCDF Engineers.
45.4 Metallic frame of all electrical equipment shall be earthed by two separate and
district connections with earthing system.
(Signed & sealed by the tenderer
in token of acceptance of above)
(RCDF)
Jaipur