Nicked Wire Sheathing


Old 12-15-09, 09:12 AM
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Nicked Wire Sheathing

I am wondering about the risk associated with a minor nick in the outer white sheathing of a 14/3 wire. I accidentally nicked off a small portion of the sheathing in my attic while checking on a leak. Essentially I tripped when my foot caught the wire and it appears a staple securing the wire to the roof truss/joist chafed off some of the outer sheathing. The damge is very small and the internal wires appear to be unharmed. I have wrapped some elctrical tape around the area but still feel a bit uneasy and I am wondering if I should have a junction box put in?

Is there a Fire Risk??

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Old 12-15-09, 09:17 AM
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Generally it's okay to use tape to repair the outer sheath of NM cable as long as the inner conductors are okay.
Old 12-16-09, 11:14 AM
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Thanks for the note, do you think there is a fire risk? If there were to be a problem what would be the symptoms?

Best Regards

Old 12-16-09, 11:29 AM
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Just a note/opinion...
Electrical tape doesn't like either cold or hot temps...not sure what your attic sees. I'd use something like a self vulcanizing rubber tape...or maybe something like "liquid electrical tape" in an environment like that.
Old 12-17-09, 07:42 AM
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Regular electrical tape is okay. You don't need the liquid tape. Just make sure the inner conductor insulation is not damaged, as Ben said.
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