Tandem Breakers Demystified: Expanding Circuit Options

Make sure there is room for another double-pole breaker You need two horizontally adjacent slots Depending on the layout of the existing breakers, you may

Both A and B circuits of a tandem breaker unit use the same phase, or incoming service leg corresponding to that slot 120V circuits use one leg

two slot For those not familiar with the terminology, a tandem breaker fits two breakers into one slot, but it still uses only one pole on the panel bus

two breakers in one slot Tandem breakers are unique because they allow you to install two circuit breakers in the space of one standard breaker This means that you can have more