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Old 08-21-2011, 01:25 PM   #1
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Calculating fill volume question


I Have a round fixture box for a vanity light shown below. I will have three 12/2 wires coming into the box, no ground clamps as I am using wire nuts. The box is plastic so no wire clamps. How can I calculate the fill volume for the fixture. My box has 20 cu in capacity.

3 wires= 6 conductors
Ground = 1 conductor
Fixture conductor equivalent ???

Total x 2.25= cu in needed

Am I right with the rest of the equation?

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Old 08-21-2011, 01:30 PM   #2
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Calculating fill volume question


Total volume required is 15.75 cu in, so the 20 cu in box is fine.
The fixture wires do not get counted

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Old 08-21-2011, 01:37 PM   #3
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Calculating fill volume question


Good news. How did you determine the fixture volume?
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Old 08-21-2011, 01:38 PM   #4
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Calculating fill volume question


Quote:
Originally Posted by toobhed
Good news. How did you determine the fixture volume?
Or do you? Does the fixture itself count? Buckles or yoke or whatever?
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Old 08-21-2011, 06:31 PM   #5
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Calculating fill volume question


fixture volume is not counted
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