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Old 11-08-2012, 01:11 PM   #1
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replacing direct wired CO2 detector into junction box. Not sure which wire is hot


I'm replacing a direct wire CO2 detector, but I'm not sure which of the two wires in the junction box is hot and which is neutral. Both wires are white, and I lacked the foresight to mark which is which before disconnecting the old unit.



Here is a picture of the wires running into the outlet, and out of the outlet to the junction box. From this picture, can anyone tell me which of the two white wires running into the junction box is hot and which is neutral?

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Old 11-08-2012, 01:17 PM   #2
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replacing direct wired CO2 detector into junction box. Not sure which wire is hot


The hot is connected to the brass side of the receptacle.

The installer should not have used a white as a hot in the raceway. I would wrap a black tape around both ends of the hot to avoid this confusion. Even bterr would be to replace it with a black or red conductor.

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Old 11-08-2012, 01:41 PM   #3
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replacing direct wired CO2 detector into junction box. Not sure which wire is hot


thanks, so just to be clear before i blow something up, the brass side is the side with the black hot wire, and the hot wire going to through the raceway is the white wire from the same side as the black wire?

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Old 11-08-2012, 02:22 PM   #4
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replacing direct wired CO2 detector into junction box. Not sure which wire is hot


Correct!
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Old 11-08-2012, 03:26 PM   #5
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replacing direct wired CO2 detector into junction box. Not sure which wire is hot


thanks for your help! i managed to do it without blowing myself or anything else up

Last edited by bodiroti; 11-09-2012 at 03:02 PM.
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