what does 12 space 24 circuit mean
#1. 12 space 24 circuit means that it can accept up to 12 breakers all of which can be single or tandem. It can also accept multipole breakers, of course, with each pole taking up one space.A tandem breaker takes up the same space as a single but has two handles and two terminals.2 space 12 circuit means that you can't put tandem breakers in it. The breaker you linked to appears to be an ordinary three-pole breaker that will occupy three spaces. countryguy said: â. Hi gang-Just bought an RPC 3 phase setup and then went and bought a load panel 3-phase from HomeDeport.