How to know when tandem breakers can be used

As for the one receptacle that is on two single-pole breakers, it is okay as long as the breakers are installed adjacently by their length (in

These breakers are designed to fit into a single slot in the breaker panel, allowing for the connection of multiple circuits in the same space

two breakers in one slot Save on tandem twin circuit breakers Free shipping on orders over $49 Easy returns 1 year warranty

two slot shelving A tandem circuit breaker connects two independent 120V circuits, both necessarily on the same leg since it's a single slot in the load center A dual pole