gporter85
Member
- Location
- Merced, CA
Hello,
I am designing a rather large small commercial single phase system. The 125A Main panel is on a pole roughly 100' away from the building we will be installing the panels on. There is a 125A sub panel in the building. Here is what i am proposing. Upgrade the main and sub panel both to 125A panels with 225A bussing. Then backfeed (2) 60 amp Breakers on to the sub panel. This meets the 120% rule as 125+(2*60)<(225*1.20). I have just never back fed a system this big... Any other concerns I should have?
I am designing a rather large small commercial single phase system. The 125A Main panel is on a pole roughly 100' away from the building we will be installing the panels on. There is a 125A sub panel in the building. Here is what i am proposing. Upgrade the main and sub panel both to 125A panels with 225A bussing. Then backfeed (2) 60 amp Breakers on to the sub panel. This meets the 120% rule as 125+(2*60)<(225*1.20). I have just never back fed a system this big... Any other concerns I should have?