I have a 240 volt cable coming from 20 amp breakers in the main box going to an outlet for the dryer. Some years ago, another 240 cable was taken from the dryer outlet, through a fused (20 amps) on-off switch box and on to another 240 volt outlet (for a power saw) and two 120 volt outlets.

My question is, why should there be fuses in the the switch box since the circuit is protected by the breakers in the main box? Is there any reason why I couldn't replace the switch box with one without fuses?