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#84809 - 05/07/03 08:25 AM Are MH fixtures nonlinear loads?
steve66 Offline
Member

Registered: 03/13/03
Posts: 25
I'm wondering if metal halide fixtures with pulse start lamps are nonlinear loads. This will determine if I need to derate the service conductors and panel feeders to 80 percent due to 4 wires in a conduit (NEC 310.15 B2 and B4).

Steve

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#84810 - 05/07/03 09:30 AM Re: Are MH fixtures nonlinear loads?
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
Yes it is, as is discharge lighting in general.

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#84811 - 05/07/03 07:43 PM Re: Are MH fixtures nonlinear loads?
golf junkie Offline
Member

Registered: 04/22/01
Posts: 511
Loc: York, NE
Yes

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#84812 - 05/08/03 08:51 AM Re: Are MH fixtures nonlinear loads?
steve66 Offline
Member

Registered: 03/13/03
Posts: 25
thanks.

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#84813 - 05/08/03 10:09 AM Re: Are MH fixtures nonlinear loads?
engy Offline
Member

Registered: 06/25/02
Posts: 15
Loc: Minnesota
Dare I say No?

Are these electronic ballasts?

The cuts I just checked were magnetic.

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#84814 - 05/08/03 10:35 PM Re: Are MH fixtures nonlinear loads?
frenchelectrican Offline

Member

Registered: 02/06/03
Posts: 938
Loc: Wi/ Paris France { France for ...
hey engy all magataic and electronic ballast do make non liner load so no matter what type the ballast it will make that effect and cant expect to be better than magatic ballast if you read the volts and current ratio it is not the same as indscent or liner loads are and some ballast manufacter will put it in called ballast factor it is hard for me to explain that meaning but scott35 or other members can make a chart to show how it can affect it

merci marc
_________________________
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)


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