> Anyone know of a chart or whatnot that lists common amperage loads for
> things like:
I don't know of a chart anywhere, but these are easy.
> 100W lightbulb
Allow an amp.
> 3/4 hp garage door opener
7-8 amps if it's really putting out 3/4 hp. Electric motors draw a big
start-up surge though, so I'd allow more like 10 amps to be safe, even
assuming you're using thermal breakers or slo-blo fuses.
> small 110V hot tub heater/pump
15 amps.
> Etc. etc. etc.?
As a (rough) rule of thumb (at 110v), it takes 10 amps to make one
horsepower and 1 amp to make 100 watts. That should get you pretty close.
The other rule is that a device is not allowed to draw more than 15 amps
continuous from an ordinary 110v outlet. That's not much heat, so almost
anything that involves a heater will draw 15 amps (or close to it). That
includes a lot of small appliances, like toasters, coffee pots, hair dryers,
etc.
Randall
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