The panel would need to be listed for tandem breakers, some are not or are limited to only certain number.
Wouldn't the panel also have to be listed for its intended use ? If a 200A MB panel comes from the mfr. with the capability of 40/80 circuits, they put it through UL and had it listed that way. I'm sure some type of calculations were done during the design stage to limit the # of breakers that could be installed with a 200A main. Changing that main to a 100A would violate the UL listing IMHO. I know (logically speaking) that irrespective of the amount of CB's you install after changing over to a 100A main, the max the panel can deliver is somewhere in the area of 100A.
I think they are not sold that way because you would have individuals out there installing 400 amp mains in a 200 amp rated panel.Wouldn't the panel also have to be listed for its intended use ? If a 200A MB panel comes from the mfr. with the capability of 40/80 circuits, they put it through UL and had it listed that way. I'm sure some type of calculations were done during the design stage to limit the # of breakers that could be installed with a 200A main. Changing that main to a 100A would violate the UL listing IMHO. I know (logically speaking) that irrespective of the amount of CB's you install after changing over to a 100A main, the max the panel can deliver is somewhere in the area of 100A.
My point to all this is, if MBP's were intended to have whatever size main CB's installed why not sell them separately that way. Have a 40/80 MB panel sold (without the MB) and pick whatever size MB you want off the shelf. In fact, why not have a 80/160 panel avaiilable. The same principle applies.
I think it would be ok just thinking about it. I'm not speaking with any kind of experience and I'm probably wrong. But if you are able to put a 50 amp receptacle on a 30 amp breaker, why can't you put a 100 amp breaker in a 200 amp panel?
putting a 50 amp receptacle on a 30 amp breaker is a code violation.
Putting a single 50A receptacle on a 30A breaker is Code compliant.
Why not just install the 200 amp panel down stream of the 100 amp service?
I stand corrected. Where's the face slap emoji?
They are sold that way. You can buy a main lug panel and a main breaker kit or a breaker tie down. It's done all the time.....My point to all this is, if MBP's were intended to have whatever size main CB's installed why not sell them separately that way. Have a 40/80 MB panel sold (without the MB) and pick whatever size MB you want off the shelf. In fact, why not have a 80/160 panel avaiilable. The same principle applies.
