Wire clamp in Carlon new work box

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  #1  
Old 07-21-17, 01:31 PM
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Wire clamp in Carlon new work box

I am wiring my garage for overhead lighting. Ceiling joists exposed- will be sheetrocking. I've got a couple wire junction boxes- plastic Carlon new work boxes from HD- that will feed power to a number of florescent fixtures. I broke out clamps on these two boxes- and other locations in the house where it is too late to swap out boxes- and passed 12/2 wires though the holes. 2 questions.
1. Should I fill holes with fire block caulk or duct seal?
2. How many wires are allowed to pass through these holes? In some locations I did put two 12/2s through the hole with clamp broke off.
I am certain I am within wirefill specs for these boxes.
 
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Old 07-21-17, 01:59 PM
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The clamps are for one cable.

IMO the boxes should be replaced.
 
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Old 07-21-17, 02:13 PM
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Where boxes cannot be replaced is using fire block caulk acceptable?
 
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Old 07-21-17, 04:58 PM
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Where boxes cannot be replaced is using fire block caulk acceptable?
Technically no. If the boxes cannot be replaced then you have no choice.
 
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Old 07-23-17, 08:31 PM
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If they are the single gang blue boxes, that is not a clamp, it is a seal. You break them out to install the cable. They will break out easily, where the clamps do not.
 
 

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