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artm3 · 05-25-09, 12:50

the mains (lugs & bus bars) are rated for 200A, so you can't change the MCB

if you have space you can add some CB's
maybe some already installed are spares?

chances are everything in the box is not on all the time, eg, furnace & AC...
and breakers are only loaded up to a max of ~80% of their rating...most of the time less...

think of a receptacle circuit...they usually have 8 or less receptacles to get to the 80%, yet very seldom are more than a few have something plugged in, or even less on...

how many breakers do you want to add?
what will they serve?

look at your electric bills, see if they tell you your peak demand...this is usually the most power you used in a 15 minute sliding window...

multiply x 1000 and divide by 240...this is ~ the max amps you've drawn...
I bet it's less than 100 A

05-25-09, 12:50	#2 (permalink)
artm3 Registered User artm3 is offline Join Date: Sep 2004 Location: PA Posts: 126	Re: Electric help/questions the mains (lugs & bus bars) are rated for 200A, so you can't change the MCB if you have space you can add some CB's maybe some already installed are spares? chances are everything in the box is not on all the time, eg, furnace & AC... and breakers are only loaded up to a max of ~80% of their rating...most of the time less... think of a receptacle circuit...they usually have 8 or less receptacles to get to the 80%, yet very seldom are more than a few have something plugged in, or even less on... how many breakers do you want to add? what will they serve? look at your electric bills, see if they tell you your peak demand...this is usually the most power you used in a 15 minute sliding window... multiply x 1000 and divide by 240...this is ~ the max amps you've drawn... I bet it's less than 100 A __________________ THAT car's got 100k miles on it!?