The photo of the label is to blurred to be legible, but it should tell you which breakers are compatible and listed for use in your panel.

 

CTL is for your panel, non CTL is when you have a panel that does not accept twin breakers, but you are willing to do it anyway. This is actually not an issue on newer panels today as rules have changed allowing 60 circuits per panel instead of the old 42 circuit limitation.

 

I may get this wrong so help me out if I do so the Discussion Starter doesn't end up the proverbial creek. If a panel is labeled 40/60 for the number of breakers only half of it's full slots should except tandem breakers. That would mean that it still has to be a Circuit Limiting (CTL) panel wouldn't it? It follows that it should only except CTL breakers and those only in the 20 tandem breaker accepting slots right?

Tom Horne

 

CTL, which stands for circuit total limitation, is a term commonly associated with "twin" or 2-in-1 breakers utilized in residential load centers. These CTL breakers possess a rejection feature on the bus connection side, specifically designed to prevent their usage in specific areas within a load center.

The only way to know for sure is to contact Eaton and ask them about your panel.

I do not like "twin" breakers and especially do not like mixed amperage breakers. There can be so many rules where they can be installed. Not just in the panel, but WHERE on the panel bus.