# 120v how much can that take?

4 replies to this topic

### #1 Daniel Carruthers

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Posted 05 September 2007 - 07:45 AM

Hi
I got a music video coming up and we are shooting in an old farm house.
apparently the farm house only has one 120v circuit. So my question is how muck power can that circuit take, could it handle 2 650s?
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### #2 Bobby Shore

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Posted 05 September 2007 - 09:52 AM

hi,

You definitely want to check the amperage of the circuit as well, which will give you a better idea of how strong a load it can handle. Chances are it'll be a 15 or 20 amp circuit, so yeah, you'll be fine with 2 650's. General rule of thumb: 1000 watts of power requires 10 amps on the circuit (it's actually 8.3 amps, but it's always safer to round up). Hope that helped.

Bobby Shore
DP
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### #3 Robert Hughes

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Posted 05 September 2007 - 10:24 AM

Keep in mind that the electrical service at a rural location such as a farmhouse may have significant distribution wiring losses; if you're counting on a full 120V circuit you may actually be getting something closer to 90 volts. Will your lights still strike and operate at that low voltage? You may want to bring a generator along as a backup.

Edited by Robert Hughes, 05 September 2007 - 10:26 AM.

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### #4 Jonathan Bowerbank

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Posted 05 September 2007 - 11:16 AM

As already stated, it's amperage that you have to worry about the most. Voltage is a factor you use in figuring out how many amps your lights are using.

Watts / Volts = Amps

2(650) = 10.83
120

So as long as you're on a 15 or 20 amp circuit, you should be fine.

Edited by Jonathan Bowerbank, 05 September 2007 - 11:16 AM.

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### #5 John Sprung

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Posted 05 September 2007 - 01:49 PM

Hi
I got a music video coming up and we are shooting in an old farm house.
apparently the farm house only has one 120v circuit. So my question is how muck power can that circuit take, could it handle 2 650s?

A 15 Amp circuit would handle your two 650's, but pretty much nothing more. Add a hair dryer, and you blow a fuse. Be sure to shed any existing loads in the house first, and bring some spare fuses. Check the location to see what kind.

-- J.S.
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