"Bill" wrote in
:

*snip*


I could run my two 120v branch circuits from one 12-3 cable and a
tandem breaker. Is there much
advantage to two cables and two breakers?


*snip*

If you're running 2 120V circuits from a 12-3 cable, consider that the
neutral would have to carry twice as much current as it would in most
situations.

Two single breakers gives you the capability to move or replace just one,
should the need arise.

Puckdropper
--
Never teach your apprentice everything you know.