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#84809 - 05/07/03 11:25 AM Are MH fixtures nonlinear loads?  
steve66  Offline
Member
Joined: Mar 2003
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


2017 / 2014 NEC & Related Books and Study Guides

#84810 - 05/07/03 12:30 PM Re: Are MH fixtures nonlinear loads?  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Yes it is, as is discharge lighting in general.


#84811 - 05/07/03 10:43 PM Re: Are MH fixtures nonlinear loads?  
golf junkie  Offline
Member
Joined: Apr 2001
Posts: 507
York, NE
Yes


#84812 - 05/08/03 11:51 AM Re: Are MH fixtures nonlinear loads?  
steve66  Offline
Member
Joined: Mar 2003
Posts: 25
thanks.


#84813 - 05/08/03 01:09 PM Re: Are MH fixtures nonlinear loads?  
engy  Offline
Member
Joined: Jun 2002
Posts: 15
Minnesota
Dare I say No?

Are these electronic ballasts?

The cuts I just checked were magnetic.


#84814 - 05/09/03 01:35 AM Re: Are MH fixtures nonlinear loads?  
frenchelectrican  Offline
Member
Joined: Feb 2003
Posts: 939
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


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