AmpsOverVolts
Member
- Location
- California
- Occupation
- Electrician
I have a set of canopy pv arrays and rooftop pv arrays that all feed to inverters that then feed to PV switch gear which is separate from the buildings main switchgear (30'.) the PV switchgear is protected by a 2000A switch/Fuse and is sized with 6 parallel runs of (3) 400s, (1) 250N, and (1) 250G. (sized according to NEC 2017.)
The AHJ is asking for a GEC(3/0 according to 250.122) to tie the PV switch gear to the MSB (run separately) as well as a main bonding jumper in the PV switch gear(sized to 250.102.)
My question is where is the MBJ and GEC required by code? Wouldn't this end up with parallel grounds back to the service? The neutral in this PV arrangement is just for reference. The EGC is going to be able to handle any ground fault better than the GEC? Also the gear has built in GFCI if that makes any difference.
photo for reference
The AHJ is asking for a GEC(3/0 according to 250.122) to tie the PV switch gear to the MSB (run separately) as well as a main bonding jumper in the PV switch gear(sized to 250.102.)
My question is where is the MBJ and GEC required by code? Wouldn't this end up with parallel grounds back to the service? The neutral in this PV arrangement is just for reference. The EGC is going to be able to handle any ground fault better than the GEC? Also the gear has built in GFCI if that makes any difference.
photo for reference
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