NEC - 250.50 Grounding ElectrodeSystem.All grounding electrodes as described in250.52(A)(1) through (A)(7) that arepresent at each building or structure servedshall be bonded together to form thegrounding electrode system. Where none ofthese grounding electrodes exist, one ormore of the grounding electrodes specifiedin 250.52(A)(4) through (A)(8) shall beinstalled and used.
It says, each building or structure served, does this mean only building or structures that have service equipment? What if I have a skid on a rebar/concrete pad with a panel being sourced with a feeder? What if I have a skid with a rebar/concrete pad being supplied by a branch circuit? Do those rebars need to be grounded if they are of sufficient length? What does served exactly mean in this case?
It says, each building or structure served, does this mean only building or structures that have service equipment? What if I have a skid on a rebar/concrete pad with a panel being sourced with a feeder? What if I have a skid with a rebar/concrete pad being supplied by a branch circuit? Do those rebars need to be grounded if they are of sufficient length? What does served exactly mean in this case?