In case new installation is to be done, what basic guidelines should be followed for grounding?

In case new installation is to be done, what basic guidelines should be followed for grounding?
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1 Answer

Answer :

a. Earthing conductors in outdoor areas shall be burried 500 mm below finished grade level unless stated otherwise. 

b. Minimum 6000 mm spacing between rod pipe electrode shall be provided unless stipulated otherwise. 

c. Earthing conductor around the building shall be burried in earth at a minimum distance of 1500 mm from the outer boundary of building. 

d. Earthing conductors embedded in the concrete floor of the building shall have approximately 100-mm concrete cover. 

e. Earthing conductors along their run on columns, beams, walls etc. shall be supported by suitable cleats at intervals of 750 mm. 

f. Earthing conductors crossing the road shall be either installed in hume pipes or laid at greater depth to suit the site conditions. 

g. Whenever earthing conductors cross underground service ducts, pipes, trenches, under ground service ducts, pipes, trenches, tunnels, railway track etc. it shall be laid 800 mm below them. 

h. Earthing conductor shall be burried 1000 mm outside the switchyard fence. Every alternate post of the fence and gates shall be connected to earthing loop by one lead. 

i. Each earthing lead from the neutral of the power transformer shall be directly connected to a rod or pipe or plate electrode treated earth pit, which in turn shall be connected to station earthing.  
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