I've been doing a lot of reading and have realized there are different types of grounding requirements and I may be getting stuff mixed up.
Is there a "standard" method for grounding a rooftop array with microinverters (hoymiles HMS-1600-4T) that have a ground wire in the trunk cable ?
My thinking right now is this:
I have three things to ground. Microinverters, mounting hardware, and EMT conduit. These may require different wiring and different end points.
The microinverters have a ground wire in the trunk cable, this goes to a junction box, splices to a #10 thwn-2, and through the conduit, combiner box, disconnect box, then to the MSP. Can anything else get grounded through this run?
Now for the hardware, the rails, the pv frames and the other metal pieces, do they need a GEC that runs to a ground rod separate from my msp's grounding/ ground rod? If so, this should be a #6 bare copper down to the ground rod? Should this be run through the EMT conduit? Are there other methods or solutions for grounding this hardware?
I'm using EMT conduit so that needs to be grounded as well? If so how should the EMT be grounded? And I assume I'd need to use jumpers when I hit a plastic junction box, but where would the ground wire terminate?
The help is much appreciated!
Is there a "standard" method for grounding a rooftop array with microinverters (hoymiles HMS-1600-4T) that have a ground wire in the trunk cable ?
My thinking right now is this:
I have three things to ground. Microinverters, mounting hardware, and EMT conduit. These may require different wiring and different end points.
The microinverters have a ground wire in the trunk cable, this goes to a junction box, splices to a #10 thwn-2, and through the conduit, combiner box, disconnect box, then to the MSP. Can anything else get grounded through this run?
Now for the hardware, the rails, the pv frames and the other metal pieces, do they need a GEC that runs to a ground rod separate from my msp's grounding/ ground rod? If so, this should be a #6 bare copper down to the ground rod? Should this be run through the EMT conduit? Are there other methods or solutions for grounding this hardware?
I'm using EMT conduit so that needs to be grounded as well? If so how should the EMT be grounded? And I assume I'd need to use jumpers when I hit a plastic junction box, but where would the ground wire terminate?
The help is much appreciated!
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