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Installing T5 warehouse lighting. Each row of 9 fixtures will be on its own 20A, 277V circuit. I contemplated multiwire circuits but the single pole GHQ breakers we are using are only straight rated at 277V. I understand that handle ties can only be applied to slash rated breakers as they may have to interrupt a 480V overcurrent. I bid it for individual neutrals anyway so no big deal.

Every third or fourth row will have 3 night lights with emergency ballasts. For ease of testing I intend to pull a switched hot for these from the panel where I will install wall switches with locking plates.

I was going to pull a red as the switch leg but am concerned that the inspector may not like it. There is also a 208Y/120 service in the building.

Should I just trade it in for pink or purple? Or just run the same color as the unswitched phase and mark the switched leg with a label?

I'm leaning toward pink or purple for ease of identification.

Also, I we have all white for the neutral. I know it's not a code violation but would you trade that for gray or just use the white?

Thanks,
Scott
 

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Because you also have 120/208 in the building and you are required to identify the color code you are using for each system, you wouldn't be able to use red (assuming you are already using that in the 120/208 system). Purple may be an option if identified at the panel with labeling specifying it as 277v night lighting.
 

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Installing T5 warehouse lighting. Each row of 9 fixtures will be on its own 20A, 277V circuit. I contemplated multiwire circuits but the single pole GHQ breakers we are using are only straight rated at 277V. I understand that handle ties can only be applied to slash rated breakers as they may have to interrupt a 480V overcurrent. I bid it for individual neutrals anyway so no big deal.

Every third or fourth row will have 3 night lights with emergency ballasts. For ease of testing I intend to pull a switched hot for these from the panel where I will install wall switches with locking plates.

I was going to pull a red as the switch leg but am concerned that the inspector may not like it. There is also a 208Y/120 service in the building.

Should I just trade it in for pink or purple? Or just run the same color as the unswitched phase and mark the switched leg with a label?

I'm leaning toward pink or purple for ease of identification.

Also, I we have all white for the neutral. I know it's not a code violation but would you trade that for gray or just use the white?

Thanks,
Scott

You can use multi wire circuits. Single pole breakers will work ok. Handle ties btw do not simultaneously trip the breaker.

I would pull a similar color wire to the others the 277/480 system. Technically the NEC does not care. Pink sounds good if purple is found on the system, or yellow if orange is used but also not a normal color.
 

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Remember you can use phase tape instead of colored wires. They will call you a hack around here but it can be handy in a pinch.
 

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Discussion Starter #5
You can use multi wire circuits. Single pole breakers will work ok. Handle ties btw do not simultaneously trip the breaker.

I would pull a similar color wire to the others the 277/480 system. Technically the NEC does not care. Pink sounds good if purple is found on the system, or yellow if orange is used but also not a normal color.
I know that handle ties are not the same as common trip.

The article I read is here: http:www.ieci.org/blog/posts/view/50

It may be more UL oriented but it does make sense.
 

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...Purple may be an option if identified at the panel with labeling specifying it as 277v night lighting.
I don't think so, unless there is only one night light circuit, or if there are multiple night light circuits all on the same phase. The branch circuit conductor has to be be identified as to phase and voltage.

I would just use the color that is associated with the phase and mark the circuit with a tag or tape.
 
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