Also called a piggy-back, slimline, or twin breaker, a tandem breaker is a double breaker that takes up the space of a single-pole breaker. Unlike a double-pole breaker, which serves a single 240 ...

G3040BL1200 = 30 spaces, 40 total circuits allowed.Up to 10 tandem circuit breakers can be used. G3030BL1150 = 30 spaces, 30 total circuits allowed.Tandem circuit breakers are not allowed ...

Churning with voltage and resembling an explosion at the wire factory, the breaker panel exudes mystique. But it's just a big switch, filled with other smaller ­switches, which lead to the ...