A 120 V general-purpose house circuit should have circuit breakers or fuses with values of?

The fuses and/or breakers in a home should be matched to the circuits. A qualified electrician can help you make the proper calculations.

Do not attempt repairs or modifications if you do not have adequate knowledge about electricity or proper electrical construction practices.

Mistakes can be fatal or at best, expensive. You can burn down your house or electrocute yourself or others.