I have a customer that has used a lighting service company to install motion sensors in their offices. The 2 x 4 troffers are fed with snap wiring similar to re-lok. The contractor hired to install the sensors is picking up power and switch leg for their control device from the existing switch pack in the wiring system. The switch pack does not contain a neutral. The contractor is picking up the neutral for their control device from any nearby 2 x 4 troffer. The contractor is using 12/2 MC and only using the white wire to get the neutral back to the device that controls the switchleg on the motion sensor. The way they are providing the neutral just doesn't seem legal. Any code reference on this question?
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Picking up the neutral for a motion sensor from a fixtur
- Thread starter bdntexas
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pierre
Senior Member
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- Westchester County, New York
Re: Picking up the neutral for a motion sensor from a fixtur
Try looking at 300.3(B).
Try looking at 300.3(B).
Re: Picking up the neutral for a motion sensor from a fixtur
Pierre, thanks. The contractor is trying to use 300.20B exception as their justification.?? One other thing to note, the neutral from the fixture may or may not be from the same circuit as the hot picked up for the control device from the switch pack. Just depends on where they find the nearest fixture.
Pierre, thanks. The contractor is trying to use 300.20B exception as their justification.?? One other thing to note, the neutral from the fixture may or may not be from the same circuit as the hot picked up for the control device from the switch pack. Just depends on where they find the nearest fixture.
Re: Picking up the neutral for a motion sensor from a fixtur
I'm not nuts about the discription of the installation, but you might take a look at 330.31 and the FPN to 300.20 (B).
I think the exception to (B) for electric discharge lighting is intended for the secondary conductors??
Charlie
I'm not nuts about the discription of the installation, but you might take a look at 330.31 and the FPN to 300.20 (B).
I think the exception to (B) for electric discharge lighting is intended for the secondary conductors??
Charlie
pierre
Senior Member
- Location
- Westchester County, New York
Re: Picking up the neutral for a motion sensor from a fixtur
Charlie
I do not think those citations could be used for the type of application that has been described.
Charlie
I do not think those citations could be used for the type of application that has been described.
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