If I Have A 100 Amp Coming In And A 100 Amp Going To A Sub Panel Does This Mean I Have A 200 Amp Service Panel?
Posted on | December 13, 2009 | 2 Comments
I need to be able to install a tankless electric water heater and the specs calls for 3×30 amp breakers. Obviously the one currently there will be shut off.
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2 Responses to “If I Have A 100 Amp Coming In And A 100 Amp Going To A Sub Panel Does This Mean I Have A 200 Amp Service Panel?”
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December 13th, 2009 @ 3:11 pm
Probably not. Your service is limited to the amount of current on the main breaker in your master breaker box. Any sub-panel should run through the main breaker but it’s possible that the two panels were supplied in parallel from the power drop to your building. I’ve never seen this unless there were separate meters feeding separate portions of a building such as an apartment building or an office building with different customers paying the bill.
The size of your main breaker will depend on the wire size of the electric feed. You need bigger wire for a 200 amp service than you do a 100 amp service. You need to find out someone who can tell you if your breaker box can handle the load you want to put on it.
February 14th, 2010 @ 9:20 am
What? never seen it….i have seen feeds off meters and feeds off lugs before main breaker….i see them all the time. you have never seen them? thats hard to believe…do you see them now??