Count the watts on your equipment, do not exceed 1900 watts and do not install a larger breaker. 15a for #14 gauge, 20a for #12 and 30a for #10. If you live in the city of SA the minimum gauge is #12, but if you live outside the city you may have #14? Per 2008 code all homes shall be equiped with either Arc Fault or Ground Fault Breakers. There only a very few exceptions.