sub panel question
hello everyone, I'm curious about something I saw today and I'm not really sure it is safe. can a 2 pole 60 amp and a 2 pole 30 be installed safely in a 60 amp sub panel? thanks in advance for any replies
Assuming it has a 60 amp breaker-
Originally Posted by blackwater
If the 60 amp box is protected by a 60 amp breaker it can.
Its just a waste to do it.
If the 60 amp box is protected by a 60 amp or less. Then it is unsafe.
the manufacturer may have a maximum size branch breaker, and I would suspect this is a physical limitation.
Your sub panel could be getting back fed through that 60A breaker
Could be that the 60 amp breaker he is seeing, is the 60 amp main breaker for the sub panel.
Why is it unsafe
I'm just a homeower (Electrical Engineer by training, but do software
Originally Posted by beenthere
these days). And I don't do any big time wiring.
But I guess I don't see why having a 60 amp 240 V box being protected
by a smaller breaker (that presumably is one each leg) is unsafe.
You are saying that a smaller breaker is unsafe while a larger one is safe?
Won't the box that has the small breaker just be very likely to trip?
Meant to type "Then its not unsafe".
Originally Posted by bobRitchie