Hi Kirk,
Yes, I have see (photos available on request) a BP panel where the junction box
got so hot that it shattered the whole panel and the one of the leads to the
panel burned off. This was on a comp roof which probably saved the house, but
this is conjecture as I did not see this as it hap
My take on 250.110, is that you could run separate EGCs from either end
to bond the metal J boxes, and not have the EGC run the entire length
through the PVC.
Option 2: attach a Bobcat to one end of the PVC and rip it out of the
ground, then use the freshly made trench to reinstall what the
in
Title: National Electrical Code 2008 Edition
Glenn,
Thank you for responding. Here's my exploration of 300.3(B):
(This is from a draft pdf version of the 2011 Code on my laptop.)
300.3(B) Conductors of the Same Circuit. All conductors of
the same circuit an
Allan,
You might also interpret 300.3(B) as requiring all conductors of the same
circuit to be located in the same conduit.
(B) Conductors of the Same Circuit. All conductors of the same circuit and,
where used, the grounded conductor and all equipment grounding conductors
and bonding conducto
Hello,
You may recall my mention of a 45kw BP solar array, of 2006 vintage, which
has multiple failures due to j-box connection overheating. Some of the burn
marks(and cracked glass) are impressive. I'm wondering if this issue is a
legit fire hazard. Has anyone evidenced a roof or j-box firing
Title: National Electrical Code 2008 Edition
August,
Yes, that's relevant to my question. All metal boxes are grounded
at both ends by existing EGCs. Only the PVC conduit is not. So
when I read section 250.110 as you have cited, "all
equipment fastened in place
National Electrical Code 2008 Edition
Hi Allan,
Per NEC 250.110 all equipment fastened in place with exposed non-current
carrying metal parts likely to become energized needs equipment grounding.
There are some conditions and exceptions listed in the code so you might
want to check through that
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