An earth clamp connects the lead out cable from the energiser to an earth rod. The earth clamp guarantees a secure connection between the energiser and earthing system for optimum electrical conductivity.
In earthing, earth lamp connects the copper tape with the Earthmat and also connects it with the electrode (Earthrod) in the ground for proper conductivity.
There are different types and shapes of clamps which includes C-clamp, G-clamp, test clamp, oblong clamp, U-bolt clamp, 4-way clamp, A-clamp, small clamps etc