Code for main electric panel


  #1  
Old 10-24-14, 03:59 PM
Y
Member
Thread Starter
Join Date: May 2002
Location: USA
Posts: 161
Upvotes: 0
Received 0 Upvotes on 0 Posts
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
 
  #2  
Old 10-24-14, 04:07 PM
pcboss's Avatar
Forum Topic Moderator
Join Date: Jul 2002
Location: Maryland
Posts: 13,979
Received 194 Upvotes on 170 Posts
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.
 
  #3  
Old 10-24-14, 04:20 PM
Mr.Awesome's Avatar
Member
Join Date: Oct 2013
Location: Canada
Posts: 511
Received 0 Upvotes on 0 Posts
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.
 
  #4  
Old 10-24-14, 09:19 PM
F
Member
Join Date: Mar 2006
Location: Wet side of Washington state.
Posts: 16,321
Received 38 Upvotes on 30 Posts
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.
 
  #5  
Old 10-25-14, 04:04 AM
Y
Member
Thread Starter
Join Date: May 2002
Location: USA
Posts: 161
Upvotes: 0
Received 0 Upvotes on 0 Posts
Thanks everyone. I'm going to add a dryer to basement. My total load for the panel is much less than 200Ax2.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: