EGC Color

The answer to the question is yes, you must use green (or green with yellow stripe(s)).

There is a rule that allows grounded conductors to use PV wire in colors other than white or grey, but not for EGCs.
 
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five.five-six said:
I have’t don PV in years, I just used like #10 bare to bond the racks and modules.
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If the EGC is insulated, the insulation must be green or green/yellow striped irrespective of the insulation type, but it does not need to be insulated. Either way, it is easily distinguishable from the other conductors.
 
Jalvarez1287 said:
250.119 requires EGC to be green when is 6 AWG or smaller. Does that indication applies even if the cable used is type PV-Wire?
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Yes. in 690.31(B)(2) it is permitted to identify PV system dc conductors of any size (even 6AWG and smaller) by color coding, marking tape, or tagging, so positive and negative can be phase taped, but it does not apply to EGC's.
 
solarken said:
Every stick, yes, but still need to bond adjacent rows using bare solid #6 or bonding jumpers, right?
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Of course, every piece of metal still needs grounding, but nowadays there are better grounding schemes than running unspliced bare #6 up and down every row of modules with a grounding lug on every stick of rail. That was a real PITA. Most rail splices are now listed as grounding connections.
 
ggunn said:
Of course, every piece of metal still needs grounding, but nowadays there are better grounding schemes than running unspliced bare #6 up and down every row of modules with a grounding lug on every stick of rail. That was a real PITA. Most rail splices are now listed as grounding connections.
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I hardly ever do rail roof systems, are the modules typically allowed to bond all the rows of rail so you just need to hit the array with an EGC once? I thought u still needed a run of #6 to bond each row of rail.
 
electrofelon said:
I hardly ever do rail roof systems, are the modules typically allowed to bond all the rows of rail so you just need to hit the array with an EGC once? I thought u still needed a run of #6 to bond each row of rail.
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Yes one grounding lug per row, typically. (And it doesn't necessarily need to be 6awg.) Modules can bond from one rail to the other rail in each row.
 
electrofelon said:
I hardly ever do rail roof systems, are the modules typically allowed to bond all the rows of rail so you just need to hit the array with an EGC once? I thought u still needed a run of #6 to bond each row of rail.
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UL 2703 Listed module mounting systems come with grounding included. Just one EGC connection to the rack. I think most of them still incorporate a WEEB or WEEB like grounding washer in the assembly.
 
pv_n00b said:
UL 2703 Listed module mounting systems come with grounding included. Just one EGC connection to the rack. I think most of them still incorporate a WEEB or WEEB like grounding washer in the assembly.
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Many (most? all?) module clips now have "teeth" that pierce the Al oxide to do what WEEB clips once did.
 
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