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#200459 - 04/01/11 10:56 PM Dropping 1 leg of 480 to control site lighting
wewire2 Offline
Member

Registered: 11/14/02
Posts: 246
Loc: California
Is there a code reference that prohibits dropping 1 leg of a 480 circuit to control HID lighting? I notice 410.141(B) only applies to fixtures exceeding 1000V.

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#200480 - 04/02/11 07:37 PM Re: Dropping 1 leg of 480 to control site lighting [Re: wewire2]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6785
Loc: Brick, NJ USA
Wewire2:

Care to explain the above with a little more clarity please.
_________________________
John

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#200485 - 04/02/11 08:39 PM Re: Dropping 1 leg of 480 to control site lighting [Re: wewire2]
wewire2 Offline
Member

Registered: 11/14/02
Posts: 246
Loc: California
Sure, thanks John.
3 phase 480, 3 wire is pulled to a light pole with 4
fixtures on the pole. The site engineer wants to drop legs to control the lights separately. I don't like the design but can't seem to find anything that prohibits it as long as the required disconnecting means is in place. What do you think?

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#200486 - 04/02/11 10:05 PM Re: Dropping 1 leg of 480 to control site lighting [Re: wewire2]
George Little Offline
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Registered: 01/18/04
Posts: 1492
Loc: Michigan USA
Look at 410.104(B). I don't know if it applies but it could. Not sure what the Design Professional has in mind but this might help.


Edited by George Little (04/02/11 10:06 PM)
_________________________
George Little

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#200488 - 04/02/11 11:10 PM Re: Dropping 1 leg of 480 to control site lighting [Re: wewire2]
wewire2 Offline
Member

Registered: 11/14/02
Posts: 246
Loc: California
George, I think that's what I'm looking for. The "auxiliary
equipment" terminology threw me off and I skimmed right past it. It appears that the term auxiliary equipment refers to ballast. Thank you sir!

410.104(B)Where supplied by ungrounded conductors of a circuit, the switching device of auxiliary equipment shall simultaneously disconnect all conductors.

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