Equipment Groundiong Conductor Size?

73 Posts
Aug 15, 2010 04:09 pm
Equipment Groundiong Conductor Size?

I have a small stand alone 12v nominal system with a battery bank. What size wire do I need for the equipment grounding conductor within conduit?

thanks for help
578 Posts
Aug 16, 2010 08:50 am
Re: Equipment Groundiong Conductor Size?

regarding your pv source and output circuits, nec 690.45 will send you to nec 250.122, which by my calcs will say that for a system of your size that 12awg would be the minimum.  6awg is often used in pv in the pv source circuit for its physical robustness and protection from physical damage as well as fitting many components manufactured for pv equipment grounding.

always select listed grounding methods and products.  follow all local codes and rules set forth by your jurisdiction regarding electrical work and qualified service personnel.


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73 Posts
Aug 16, 2010 10:14 am
Re: Equipment Groundiong Conductor Size?

I guess I need a copy of the NEC. Both books I have on PV


explain grounding well, but don;t speak very well with regards to Equipment grounding specs.

Thanks for the Help James, I'm working on my NABCEP certification

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