Allowable Load


Old 12-23-04, 05:49 PM
Thread Starter
Join Date: Nov 2004
Location: north dakota
Posts: 161
Allowable Load

Allowable Load - for lack of a better term.

My 30yr old house has 150A service.
I currently have natural gas heat.
I'd like to install 2 to 4 elec baseboard heaters in a couple rooms.

As I understand, your appliance ampacity ratings can't theoretically overload your main service (whatever). And last year I added a 60A unattached garage.

Is there a (simple) online calculator I can used to determine if I can actually add ANY elec appliances? I was looking in a code book under allowable ampacity but got a little lost in the jargon.
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Old 12-23-04, 05:54 PM
Join Date: Sep 2000
Location: United States
Posts: 18,497
You need to do a "demand load calculation". Google that term and you'll find enough information to do it. A number of home wiring books tell you how to do it too. We can help you with it if you get stuck.

P.S. "Ampacity" is the wrong word here.

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