PV Grounding [RE-wrenches]

[Peter Parrish]

After all these years I must confess I was stymied by the comment of a
self-styled expert on grounding. He said that grounding of roof mounted PV
modules cannot be accomplished with stranded wire -- period. We were
discussing 10 AWG, 19 strands vs 10 AWG solid, so I didn't venture beyond
the case at hand. 

We normally use 10 AWG solid but occasionally we run out and use 10 AWG THHN
Green 19 strand in a pinch (module to module, rail to rail or sub-array to
sub-array)

For the record, the PV modules had a series fuse rating of 15A and we were
paralleling two strings at the inverter, which was a Xantrex GT4.0 with a
600 volt 1-Amp ground fault protection fuse.

Is he right?

- Peter 

California Solar Engineering, Inc.
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parrish at calsolareng.com 


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