Two Pole Breaker

Are Tandem Breakers Safe? two breakers in one slot They are two breakers together that only take up one slot in the breaker box They are for 110 volts only, as they share the same leg of the two breakers in one slot A tandem breaker fits two individual breakers into the size of one That allows you to add new breakers when your breaker box doesn't have any new slots

two slot shelving So if the manufacturer has designed a panel to take only full height breakers, then you can't use the pancake breakers or the twins