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#61955 - 02/06/06 02:44 PM lighting demand calc's
sparky 134 Offline
Member

Registered: 09/04/04
Posts: 92
Loc: Joliet, Il, USA
I don't have a lot of experience with engineering so I am looking for a little help with figuring the lighting demand.
Here are the specs:

119-50watt incadescent lamps
21 -2x4 3lamp lay-ins, 3lamp T-8
23 -flourescent track heads, 2 lamps each

All of the lighting is 120v. The panel is 3phase.

From what I understand, a power factor has to be figured in for the fluorescent portion of the load.

Thanks for any help.

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#61956 - 02/06/06 04:25 PM Re: lighting demand calc's
e57 Offline
Member

Registered: 05/27/03
Posts: 2837
Loc: S.F.,CA USA
A lot really depends on the use of the space, and what the lighting is. Most of that can be done by VA/sq'. See 220.3(A) through (C), 220.10 through 12 may also be applicable, and there is an example in Annex D-3.

This is a portion of the FPN on 220.10
 Quote:
See 220.4(B) for the maximum load in amperes permitted for lighting units operating at less than 100 percent power factor.


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