250.194(A)

[WA_Sparky]

250.194(A) Metal Fences.
"Where metal fences are located within 5m (16) ft of the exposed electrical conductors or equipment, the fence shall be bonded to the grounding electrode system with wire-type bonding jumpers as follows:
(1) Bonding jumpers shall be installed at each fence corner and at maximum 50m (160ft) intervals along the fence."

I'm working on a project where there is an electrical substation on one end of the property, completely fenced in. On the complete other end of the property there is a maintenance shop (~300ft away). The entire property is fenced in, where the substation fencing and property fencing connect at two points of the property. For some reason there is fence grounding system all the way at the shop.. Does this code require grounding in 160ft intervals on the fence no matter the length or am i to assume there are some exposed conduits underneath the fence somewhere? My overall goal is to understand why there is grounding at the fence and if the grounding system needs to be extended for any fence addition/modifications.

thanks,

 

[petersonra]

pretty ambiguous wording.

could mean you only have to bond where the fence is within 5 m of the exposed conductors, or could mean the whole fence line has to be bonded. my inclination is it means the latter, even though it makes little sense.