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Just Joshin Just Joshin is offline
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Default pancake boxes + junction

On 22 Mar 2007 07:49:13 -0700, "Mike" wrote:

I read in a NEC summary that a 6 cubic inch pancake box is "only good
for the end of a 14/2 run", i.e., no outgoing 14/2 allowed. But I
also read (somewhere, not specifically in the NEC) that the pancake
box can be used as a junction box, as long as the fixture atached is
domed and hence provides the additional cubic inchdes needed for the
junction.

Is the second statement true? If so, do inspectors go along with
it?

If I have 6 outdoor fixtures to install along the front of a building;
can I just daisy chain a 14/2 to each location, and leave (2) 1 foot
ends hanging out of a hole at each location, claiming a pancake box +
domed fixture will be installed at each location (when the building
exterior is finished)? I've seen plenty of new construction where the
wiring for exterior lights is jsut left hanging, and I assume they get
their rough wiring bought off prior to completing the exterior trim/
fixtures.

Mike

imho:

You need 6 cubic inches for a dead ended 14/2. So the pancake boxe
provides the min required. For a junction box to splice two 14/2's
you need 10 cubic inches. I think your observation about the size of
a pancake box makes it clear what the NEC would say about using it as
a junction box.

FYI, check with your AHJ. They have the ultimate say.

tom @ www.Donate-Car-2-Charity.com