Power Supply Adequate For Addition?


Old 10-29-06, 04:29 PM
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Join Date: Nov 2001
Location: Washington State
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Power Supply Adequate For Addition?

We are in the process of building an addition on our home. Along with the standard set of lights and outlets, we will power a seperate heat pump HVAC unit and two 20 amp radiant floor heat circuits. My question is: How do I find out whether or not I have sufficient power to add these loads (I will need a second subpanel, as mine is full)? I plan on contracting out the electrical portion of this contract but would like to know whether or not I need to include in the proposals bring additional power in.
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Old 10-29-06, 04:35 PM
Join Date: Sep 2002
Location: welland ontario
Posts: 7,105
Received 133 Votes on 119 Posts
you need to do load calculation.
Here is a link to one that will help you caclulate your entire dwelling load.


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