Lighting Calc

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Old 11-10-06, 07:06 PM
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Lighting Calc

Making sure I understand this correctely; for a 20 Amp 120 v ciruit.

20Ax120V=2400 VA(Watts)
2400VAx.8= 1920 VA(Watts) Allowable

So you could have 32- 60 Watt light bulbs on one 20 Amp circuit!?
 
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Old 11-10-06, 07:10 PM
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Yes and no.
You can have 32 fixtures with a 60 watt max.
You do NOT use the actual lamp used. You must use the maximum lamp a fixture can accept when figuring the load.
 
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Old 11-10-06, 07:14 PM
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Excellent.
 
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Old 11-11-06, 07:33 AM
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If the luminaire is designed so that it will not accept a lamp with a wattage rating that exceeds 60, then 30 such luminaires can be supplied with a 20 amp Branch Circuit.
 
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