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lighting demand calc's #61955
02/06/06 06:44 PM
02/06/06 06:44 PM
sparky 134  Offline OP
Joined: Sep 2004
Posts: 91
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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Re: lighting demand calc's #61956
02/06/06 08:25 PM
02/06/06 08:25 PM
e57  Offline
Joined: May 2003
Posts: 2,876
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
See 220.4(B) for the maximum load in amperes permitted for lighting units operating at less than 100 percent power factor.

Happy number crunching.... [Linked Image]

Mark Heller
"Well - I oughta....." -Jackie Gleason


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