PV Array and 300.3(B)

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Pierre C Belarge

Senior Member
I agree with Don, that the DC conductors are not an issue being installed in this manner. The Alternating Current is what creates the issue.

300.20(A) - Where conductors carrying alternating current are installed....
 

elohr46

Senior Member
No raceway for the wiring from the string to the combiner boxes. USE wire is used per 690.31(B) a picture is posted from prior to termination.

The -DC is grounded.

The feeder from the combiner box is 1/0 and is adequate.

Article 690 does not say you can ignore 300.3(B)

Thanks for the comments. This forum is an invaluable source of information.

I have to agree with your post. 690.31(B) requires physical protection which would eliminate 300.3(B) if the 2" raceway was completed all the way to the combiner box. Exposed wiring under the array is permitted, hard to tell from the pictures provided but I'm not seeing bonding jumpers between arrays.
 
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