[RE-wrenches] NEC 480 - battery enclosure question

[Dan Fink]

Esteemed Wrenches;
An email question from my recent Home Power article on charge 
controllers that I'm unsure of.
Does NEC specifically forbid mounting other gear, such as charge 
controllers, inside a battery enclosure? How about shunts?
It's not in 480 that I can see, and 480 doesn't seem to treat the 
interior of a battery enclosure as particularly explosive, because as 
per 480 it has to be adequately vented anyway.
Of course there are a zillion common-sense reasons not to actually DO 
that -- even an MX60 has a relay that can spark-- and of course 
corrosion on the controller terminals, circuit board, etc. Bad news all 
around and I never do it.  I learned this as an apprentice back in the 
1990s, and I just don't do it. But I do put shunts in there 
sometimes...is this a no-no? The shunt terminals are brass, I've never 
seen any really nasty corrosion build up, but I'm quite curious.
BUT I'm wondering  if I'm missing something obvious in some other NEC 
section etc.

Thanks in advance!

-- 
Dan Fink
Executive Director;
Otherpower
Buckville Energy Consulting
Buckville Publications LLC
IREC / NABCEP accredited Continuing Education Providers
(970) 672-4342