How to know when tandem breakers can be used

A tandem breaker is TWO separate 120v circuit on a single breaker img Electrician: WireGuyFranklin If you switch the bottom wire to the top

second method was used to eliminate the automatic opening of the primary breakers supplying the banks All breakers under test were arranged to trip

two slot A tie bar physically connects the two breakers together • Locations 17, 18, 19, and 20 are empty slots and can be used for additional branch circuits

two breakers in one slot Please see comment below for information on how to combine 2 Double Pull Breakers to free