Code for main electric panel

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  #1  
Old 10-24-14, 03:59 PM
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Code for main electric panel

One of my main electric panel has 200A main breaker, the total amperage of all other beakers is 260A+260A= 520A which is 120A more than main breaker rating (200Ax2=400A).

Is there a code for total breaker amp rating versus main breaker amp rating?

Thanks
 
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Old 10-24-14, 04:07 PM
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Adding up the breaker handles is meaningless unless you like math problems. It is in no way a reflection of the actual load on the panel. The correct method is called a demand load calculation.
 
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Old 10-24-14, 04:20 PM
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To expand on what pcboss said...

You have a 15A breaker with 12 receptacles on it lets say.
With nothing plugged in, that circuit is drawing no current, therefore you are not drawing 15A.
Same can be said for the rest of your breakers. Your stove and dryer are not drawing 70A while not running. I think the average home would be hard pressed to trip a 200A main breaker.
 
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Old 10-24-14, 09:19 PM
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I have about 900 amperes worth of branch circuit breakers but only a 200 ampere service. I seriously doubt I have ever come close to even a 100 ampere total load.
 
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Old 10-25-14, 04:04 AM
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Thanks everyone. I'm going to add a dryer to basement. My total load for the panel is much less than 200Ax2.
 
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