For example, the price of a single-pole (120-volt) 15-amp breaker may only cost $5 – though, Amazon's highest rated 15-amp breaker lists for $12. However, ...

A 200-amp breaker is appropriate for a home upwards of 2000 square feet. Smaller buildings can use 150-amp or 100-amp; small homes and subpanels can use as little as 50-amp. Double-pole breaker ...

This is why people get scared of fuses. A typical 60 amp fuse box might have one 240 volt circuit for an air conditioner or electric range, plus four more fuses for the rest of the wiring in the home.