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#87570 - 03/19/04 05:11 PM 100Amp main but 125Amp panel?
Edward Offline

Registered: 12/14/02
Posts: 309
Loc: California
I need to replace existing 100Amp subpanel with another panel that has more spaces and i think the only way i can go is to put in 125 panel with more circuit capacity.However i will keep the main at 100Amp. So i will have a 125Amp panel with more circuit capacity.

I do not think this is a good idea but i also think there will be no harm because the main in the switch gear room for this condo is still 100Amps and main subfeed is still #2 copper.
By doing it this way i am gaining more spaces for two more circuits.

What are your thoughts.If i am wrong please give NEC and the year.


2014 / 2011 NEC & Related Books and Study Guides
#87571 - 03/19/04 05:32 PM Re: 100Amp main but 125Amp panel?
electure Offline


Registered: 12/24/00
Posts: 4226
Loc: Fullerton, CA USA
The designation 125 amp on a Main Lug Only panel only means that the bussing is good for 125 Amps. You could connect it to any size feeder up to that size.

Whether the circuits you want to add are a good idea or not depends only on the existing load and the additional load you will be adding...S

#87572 - 03/19/04 07:07 PM Re: 100Amp main but 125Amp panel?
Edward Offline

Registered: 12/14/02
Posts: 309
Loc: California
Thank you for the reply.
So in another words as long as the continuous
load does not exceed the main breaker 80% I can put in a 125A panel with 32 circuit capacity.

Please give NEC that states 100Amp panel does not have to be fed by a 100A breaker.


#87573 - 03/20/04 05:17 AM Re: 100Amp main but 125Amp panel?
PCBelarge Offline

Registered: 06/08/03
Posts: 657
Loc: Dobbs Ferry, NY, USA
2002 NEC - 408.13

Pierre Belarge

#87574 - 03/21/04 04:49 AM Re: 100Amp main but 125Amp panel?
Electricmanscott Offline

Registered: 01/12/02
Posts: 1478
Loc: Holden, MA USA
You could put in a 200 amp 40 circuit panel if you want. Even more room for circuits.


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