EGC required between battery disconnect and inverter?

[chuckd83]

Ungrounded DC circuit which would put it under 250.4(B) Underground Systems.

250.4(B)(4) Path for Fault Current. Electrical equipment, wiring, and other electrically conductive material likely to become energized shall be installed in a manner that creates a low impedance circuit from any point on the wiring system to the electrical supply source to facilitate the operation of overcurrent devices should a second ground fault from a different phase occur on the wiring system. The earth shall not be considered as an effective fault-current path.

A DC circuit does not have a different phase.

 

[ron]

NEC Part VI. Equipment Grounding and Equipment Grounding Conductors, and more specifically 250.110 Equipment Fastened in Place (Fixed) or Connected by Permanent Wiring Methods. would require it, grounded or ungrounded systems are not specified.

 

[chuckd83]

NEC Part VI. Equipment Grounding and Equipment Grounding Conductors, and more specifically 250.110 Equipment Fastened in Place (Fixed) or Connected by Permanent Wiring Methods. would require it, grounded or ungrounded systems are not specified.

Thanks. What would be the purpose of the equipment grounding conductor in this case? 250.109 says "to become a part of an effective ground-fault current path." But in my case, the EGC would not provide that path in case of a ground-fault.

 

[wwhitney]

But in my case, the EGC would not provide that path in case of a ground-fault.

It would in the case of two ground faults, one in each enclosure, of opposite polarity.

Cheers, Wayne

 

[chuckd83]

It would in the case of two ground faults, one in each enclosure, of opposite polarity.

Cheers, Wayne

Yes, you are correct. Thanks.