Used Diesel While We Wait for Delivery = Black Smoke

mattmia2

https://forum.heatinghelp.com/discussion/comment/1833979#Comment_1833979

so then how would a main lug panel with a backfed breaker supplying the panel work?

ChrisJ

https://forum.heatinghelp.com/discussion/comment/1833980#Comment_1833980

I don't understand?

My 100A panel has a limitation of something like 100-150A per location.

How would that not work in your question?

Let's say it's 100a on my panel. It means I have a 80a two pole breaker for my sub panel on the I'm left and to the right of it I have two 20s. That's 100a for that location and it's technically maxed out. You couldn't do an 80 two pole and then 40s across from it.

The larger 200a panels allow higher. I think 200 actually.

Here's a thread on it.

https://www.electriciantalk.com/threads/max-breaker-size-for-qo-load-center.276384/

mattmia2

https://forum.heatinghelp.com/discussion/comment/1833982#Comment_1833982

if it is backfed through a breaker, all of the current flowing on the bus has to enter through that position so any position on the bus has to be capable of carrying the full current of the bus.

the larger breakers taking 2 positions per pole solves the problem of the stab being rated for less than the bus. if you are using a breaker listed for use i that panel it will take 2 positions per pole if one stab can't handle the current.

we have drifted way off topic here.

ChrisJ

https://forum.heatinghelp.com/discussion/comment/1833990#Comment_1833990

Yes we have

But you're still asking a question that makes no sense. If you can install a 100A breaker in a 100A panel that breaker can carry the entire load of the bus. You just may but not be able to install breakers adjacent to it.

HVACNUT

https://forum.heatinghelp.com/discussion/comment/1833656#Comment_1833656

There's two breakers marked A/C. What are they connected to? Is there central air conditioning AND a ductless system for the sun room?