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Old 06-15-2014, 05:37 AM   #1
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finishing off unused security system wiring


I have a ceiling box which has an incoming 120V cable as well as an incoming old, now-unused security system wire/cable which has 4 thin, colored wires in a brown sheath...looks a lot like telephone wiring. I'm guessing the security system wiring is 12V but I don't know for sure.

The security system wiring was powering and connecting an old smoke detector which I replaced with a new one which is powered by the 120V, and not at all connected to the security system wiring.

Question 1: How do I cover up the ends of the unused security system wiring? I cleanly clipped them and covered with electrical tape but I worry it might slide off eventually - as electrical tape often does.

Question 2: does the electrical box need a blue plastic grommet in the hole that the security system wiring enters from? It was originally installed without any grommet.

Thanks,
Patrick


Last edited by mid-rise9; 06-15-2014 at 05:39 AM.
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Old 06-15-2014, 08:21 AM   #2
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finishing off unused security system wiring


Low voltage wiring should not be in the same box with the 120. Can you push the LV out of the box and plug the hole?

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Old 06-15-2014, 09:32 AM   #3
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finishing off unused security system wiring


Quote:
Originally Posted by Jim Port View Post
Low voltage wiring should not be in the same box with the 120. Can you push the LV out of the box and plug the hole?
Thank you! Yeah - I was wondering if it's even allowed to have both in the same box.

Yes, I can push the low voltage wiring out of the box but it will be impossible to retrieve if it's ever needed again (unlikely any time soon), so I don't know if I should keep it inside or push it out.

The hole's little metal knock-out circle is gone. I'll buy a knockout plug if I push the wire out. Can it be installed from the inside? I only have access from inside.

Is electrical tape sufficient to cover the cut-off ends of the LV wire, or could I use tiny wire nuts?
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Old 06-15-2014, 09:48 AM   #4
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finishing off unused security system wiring


KO plugs can be installed from the inside.

If the system is not used there should be no need for tape or wire nuts. If you want either should be fine.
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Old 06-15-2014, 10:20 AM   #5
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finishing off unused security system wiring


Quote:
Originally Posted by Jim Port
Low voltage wiring should not be in the same box with the 120. Can you push the LV out of the box and plug the hole?
What do you do with exit signs with remote heads tapped off them?
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