Answer Posted / asmita
Gravels/metal is used in T/F yard for following purposes-
1.For providing gd earthing as it prevents growing of gross.
2.it prevents travelling of creatures like snake,rats etc
which may result in Short ckt if touchd live parts.
3.In case of oil leakage from C.B.it is well distributed
due to metal n doesnot result in fire.
4.Reason of Step potential n touch potential.
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