I am working on a storage mini-warehouse building. It is 11,200 sq/ft. 58 individual storrage units. General wants 1 keyless fixture in each unit with a 100 watt bulb. Each unit will also have one receptical. Would I use table 220.3(A) to figure the lighting load? Would this be considered a warehouse? What load should be figured for the recepticles? There are also 8 outside fixtures that will pull 4 amps each. This will be a single phase service. Thanks in advance for any help. Using the table mentioned above and appendex D it doesn't seem to call for a very large service. Tim
service size?
- Thread starter tim
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jxofaltrds
Inspector Mike®
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- Mike P. Columbus Ohio
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- ESI, PI, RBO
Re: service size?
Tim
My opinion not necessarily the code. I would use 180va per outlet.
58 * 2 = 116 * 180 = 20880 / 120 = 174 now add the 4amp fixtures.
Mike P.
Tim
My opinion not necessarily the code. I would use 180va per outlet.
58 * 2 = 116 * 180 = 20880 / 120 = 174 now add the 4amp fixtures.
Mike P.
Re: service size?
Tim
I think the JX is on the right trail. I would do it as follows:
Code requires 1/4 w per sq ft. I would increase it to 1 watt.
11200 x 1 w = 11200 w
180 w x 52 = 9360 w for rec
Total = 20560 watts/ 240 v = 86 amps
Code requires first 12500 at 100% and remainder at
50 %. It seems to me that a 100 amp service would do. Suggest you consider a 20 watt flor bulb for the inside lighting. Mabe you want to go to a 150 amps for unknowns.
[ January 12, 2004, 11:26 PM: Message edited by: bob ]
Tim
I think the JX is on the right trail. I would do it as follows:
Code requires 1/4 w per sq ft. I would increase it to 1 watt.
11200 x 1 w = 11200 w
180 w x 52 = 9360 w for rec
Total = 20560 watts/ 240 v = 86 amps
Code requires first 12500 at 100% and remainder at
50 %. It seems to me that a 100 amp service would do. Suggest you consider a 20 watt flor bulb for the inside lighting. Mabe you want to go to a 150 amps for unknowns.
[ January 12, 2004, 11:26 PM: Message edited by: bob ]
Re: service size?
2800va for lights at 1/4VA per square foot, I also think you need the 1200VA for a sign per 220.3B6. Add 4A * 8 Fixtures * 240V (or are they 120V?) = 7680W. 180VA per recepatcle = 9360W. Total is 21040 Watts. 21040W /240V = 87 amps. I would think a 100 A service would be large enough. After all, with mini-warehouses, very few will ever be in use at one time.
Not that I want to run you out of a job, but aren't lights and receptacles kind of unusual in a miniwarehouse? Why give people free power? I would be afraid someone would find some reason for leaving an electric heater plugged into one of the outlets. And how do you make people turn off the lights when they leave?
Steve
2800va for lights at 1/4VA per square foot, I also think you need the 1200VA for a sign per 220.3B6. Add 4A * 8 Fixtures * 240V (or are they 120V?) = 7680W. 180VA per recepatcle = 9360W. Total is 21040 Watts. 21040W /240V = 87 amps. I would think a 100 A service would be large enough. After all, with mini-warehouses, very few will ever be in use at one time.
Not that I want to run you out of a job, but aren't lights and receptacles kind of unusual in a miniwarehouse? Why give people free power? I would be afraid someone would find some reason for leaving an electric heater plugged into one of the outlets. And how do you make people turn off the lights when they leave?
Steve
Re: service size?
I think it would be a good idea to rate your keyless fixtures for the maximum watts that the fixture is rated for.Just like you would for recessed cans.I have 200 watt light bulbs in my keyless fixtures in my garage.I think keyless fixtures are rated 660 watts at 250 volts.I would install more than 100 amps.I wouldn't think that all the units would be on at the same time but I think to meet the code you would need a little more than 100 amps.Your service will probably never see 30 amps at one time.
I think it would be a good idea to rate your keyless fixtures for the maximum watts that the fixture is rated for.Just like you would for recessed cans.I have 200 watt light bulbs in my keyless fixtures in my garage.I think keyless fixtures are rated 660 watts at 250 volts.I would install more than 100 amps.I wouldn't think that all the units would be on at the same time but I think to meet the code you would need a little more than 100 amps.Your service will probably never see 30 amps at one time.
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