double breaker with shared neutral

I often see two 20 amp breakers with a handle tie and a shared neutral serving the disposer and dishwasher. Can this same method be used for other general lighting circuits? I inspected a house today that had double breakers with handle ties and shared neutrals serving a bath and a bedroom, a furnace and bath and a dining room and the bath. Thanks.

This is called a Multi-Wire Branch Circuit. Google that for more information.

It can be used unless AFCI protection is required, unless a 2 pole AFCI breaker is available.

MWBC’s are required to have a simultaneous disconnect of all ungrounded conductors sharing a neutral. There are no restrictions on where these can be used in a residence.

If your asking for a tandem breaker than no.

If your asking for a 2 pole breaker than yes.