[shotek]

A couple facts about my home currently. The house is 100% electrical including heat, air (window units) water, stove. The house is 1800 sqft. We currently have a 100 amp service which seems to supply enough electricity for this setup. We are adding a 1600 sqft addition to the house which we are acting as the GC to save money on the project.

My question is should I upgrade the service to a 200 amp service or go to a 300 amp service. I would also like to have two panels the existing 100 amp in existing house and another panel in the addition. I would like to have the new upgraded service go into one panel with 2 circuits that go to the new and old panels. Is this scenario possible. I am open to other suggestions. In the addition we will have elect baseboard heat and be installing a elect central air that will supply air to the existing and new parts of the home. (5 ton).

Thanks

[stanfortyman]

We are adding a 1600 sqft addition to the house which we are acting as the GC to save money on the project.

Sorry, but I HAVE to laugh when I see or hear this. WHAT a myth!
I guarantee you it will wind up costing more in the long run. It's just the truth.
PLUS, unless you have a VERY good clue about how these things work and about coordinating subs you will certainly wind up pissing many of them off.
What construction experience do you have?


Oh, I'd consider the 320A service. A 3500'/sq ALL electric home is a HOG.
Did anyone do a load calculation?

[shotek]

I think it will work out fine. If I had the money I would hire someone in a heartbeat to do the whole thing for me and just stand back and watch but I don't have it so I am forced to do it this way.

How do you do a load calculation?

[shotek]

I think it will work out fine. If I had the money I would hire someone in a heartbeat to do the whole thing for me and just stand back and watch but I don't have it so I am forced to do it this way.

How do you do a load calculation?