junyar
Member
- Location
- South Carolina
Can you have a 4 lamp flourscent light with 2 ballast, 1 being fed from 277v emergency circuit, and the other ballast on a switched 120v?
2 different voltages in a light fixture
- Thread starter junyar
- Start date
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Len_B
Member
- Location
- New Hampshire
Re: 2 different voltages in a light fixture
I can't find anything in the Code that wouldn't allow this. I've never seen it done before. I would definitely put a sticker inside the fixture alerting electricians that there are two sources of power (at different voltages).
Len
I can't find anything in the Code that wouldn't allow this. I've never seen it done before. I would definitely put a sticker inside the fixture alerting electricians that there are two sources of power (at different voltages).
Len
- Location
- Massachusetts
Re: 2 different voltages in a light fixture
We do this alot, split a light with Normal and Emergency power but it was always 277 volt for both, I can not think of any reason it could not be done with 120 and 277.
As far as a lable of two souces of power, it would be nice, but has not been required of us.
There are many times when you have two souces of power that are not marked as such, think of office cubes that have up to 6 circuits per group.
Bob
[ February 28, 2003, 04:38 AM: Message edited by: iwire ]
We do this alot, split a light with Normal and Emergency power but it was always 277 volt for both, I can not think of any reason it could not be done with 120 and 277.
As far as a lable of two souces of power, it would be nice, but has not been required of us.
There are many times when you have two souces of power that are not marked as such, think of office cubes that have up to 6 circuits per group.
Bob
[ February 28, 2003, 04:38 AM: Message edited by: iwire ]
sobucky@earthlink.net
Member
- Location
- Missouri
Re: 2 different voltages in a light fixture
The Wire to the 277 ballast should be orange and the 120 should be black.Can't find anything that says you shouldn't.
The Wire to the 277 ballast should be orange and the 120 should be black.Can't find anything that says you shouldn't.
- Location
- Illinois
- Occupation
- retired electrician
Re: 2 different voltages in a light fixture
sobucky,
Why these colors? There is no NEC requirement for specific colors for this application. If the 120 and 277 volt circuits are multiwire circuits you have to comply with 210.4(D), but the choice of color used is up to the designer or installer.
Don
sobucky,
Why these colors? There is no NEC requirement for specific colors for this application. If the 120 and 277 volt circuits are multiwire circuits you have to comply with 210.4(D), but the choice of color used is up to the designer or installer.
Don
- Location
- Massachusetts
Re: 2 different voltages in a light fixture
No rewiring necessary for 2x2 or 2x4 drop-ins with 2 ballasts, same as using 2 switches to control fixture.
No rewiring necessary for 2x2 or 2x4 drop-ins with 2 ballasts, same as using 2 switches to control fixture.
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