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Old 02-24-2011, 01:19 PM   #1
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Is it safe to have a knob and tube go into a junction box with Romex coming out of it then bury it under a floor board in an attic? I am doing some work in my attic and came accrossed this under a floor board when tracing the connection from my light switch

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Old 02-24-2011, 01:24 PM   #2
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You can't block access to the junction box, but other than that, it sounds OK.

If you could make it possible to pull up the floor board there without damaging anything or removing trim, it should be OK.

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Old 02-24-2011, 01:36 PM   #3
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That I can fix. I was just concerned whether or not you could have know and tube going in and romex coming out.
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Old 02-24-2011, 06:53 PM   #4
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knob and tube


As long as the j-box is left accessible. If you're going to be opening the wire joints, be sure the black of the romex is tied to the 'hot' of the k&t and the white to the k&t neutral for correct polarity. This week I worked on a k&t house. Used an extention cord plugged into a known grounded GFI to test which k&t wire was which. Also, you have to be very careful when working on k&t wiring...many times the neutral was used (or ends up getting used) for more than one circuit, so just because the breaker is off on the circuit you're working on, doesn't mean the neutral is dead.
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Old 02-25-2011, 07:12 AM   #5
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That's good to know! I will definitely watch for that and check it twice. Thanks for the advice. I just worry about fire hazzards. I'm not great with electrical and that is always my biggest fear.
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