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Old 11-16-2009, 03:15 PM   #16
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Grounding in round box


Ok, now back to the original question. Do you agree with the above noted method of grounding?

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Old 11-16-2009, 03:22 PM   #17
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Grounding in round box


That screw on the metal box is the grounding screw
I cut the wire long, wrap it around that screw then to the fixture
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Old 11-16-2009, 03:58 PM   #18
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Grounding in round box


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What box would you recommend for this application(exterior mounting) or what would need to be added to this box?
IMO, your box is fine. It's only a technical foul. There is probably a big canopy on the fixture that will allow lots of extra room for wiring.
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Old 11-16-2009, 04:03 PM   #19
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Grounding in round box


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IMO, your box is fine. It's only a technical foul. There is probably a big canopy on the fixture that will allow lots of extra room for wiring.
I love the electrical code..... Yes, this is the case and the fixture is already up. I've got the box extender on hand but it will create two problems:

1) I have to undo all the wirenuts, not a big deal but time consuming
2) This is mounted around vinyl siding that is 1/2" thick. Looks fine and fixture is flush now, if I add the extender the fixture will now protrude out leaving it unsightly and more prone to the elements.

I love these mental dilemmas.

Last edited by n0c7; 11-16-2009 at 04:07 PM.
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Old 11-16-2009, 04:07 PM   #20
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Grounding in round box


As far as grounding, like they said, wrap one ground around the screw and wire nut the other one (along with the fixture ground) to it.

Make it nice and clean and don't lose any sleep over the box capacity.
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Old 11-16-2009, 05:04 PM   #21
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Grounding in round box


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Originally Posted by 220/221 View Post
As far as grounding, like they said, wrap one ground around the screw and wire nut the other one (along with the fixture ground) to it.

Make it nice and clean and don't lose any sleep over the box capacity.
Any forgiveness in the code for the large canopy of fixtures?
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Old 11-16-2009, 05:13 PM   #22
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Grounding in round box


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Any forgiveness in the code for the large canopy of fixtures?
Only if the canopy has the cu stamped inside.
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Old 11-16-2009, 05:20 PM   #23
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Grounding in round box


And if it does, how do you measure cu in for it?
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Old 11-16-2009, 05:24 PM   #24
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Grounding in round box


The cu will be stamped inside the canopy and you add that to the cu of the box.
If the canopy does not have the cu stamped inside, it does not matter how big it is, code wise it can not be used in box fill calculations.
Based on NEC anyway.
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Old 11-16-2009, 05:26 PM   #25
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Ok, gotcha.
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Old 11-16-2009, 08:06 PM   #26
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Grounding in round box


Alright, I added on an 1/2" extension which should meet the 10 cu in requirement and the grounding was done with the above noted method. Thanks all.
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Old 11-16-2009, 08:09 PM   #27
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Grounding in round box


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Originally Posted by Scuba_Dave View Post
Trying to stuff another 14/2 violates code
It's legal to have fixture wire in there - which is almost always smaller gauge wire
It's enough of a PIA to get the one 14/2 in there
Most outdoor luminaires have space in their bodies to take up the wiring, including for a built-in light or motion sensor. (No matter what) Don't Drink and Drive, Ever!!!

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