[RE-wrenches] 4/0 GEC

[Drake Chamberlin]

Hello Wrenches,

Revisiting the grounding requirements for DC systems,  the grounding 
electrode conductor is still required to be as large as the "largest 
conductor supplied by the system" (250.166(B).  When we run a GEC to 
a piping system, or the re bar cage embedded in the concrete 
foundation of a building, it still reads like we need to meet this requirement.

If the system is a 24 volt, battery connected, VFX 3524, it still 
seems that we would need to run a 4/0 GEC.  Inspectors backed off 
making us do this a dozen years ago. Why are we not being required to 
do this now?

Thanks,


Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
740-448-7328
740-856-9648