It is not advisable to put a 10 amp fuse in a 20 amp slot. Fuses are designed to protect electrical circuits from overloads, and using a fuse that is too small for the circuit can be dangerous. A 10 amp fuse will blow if the circuit draws more than 10 amps, which could cause damage to the circuit or even start a fire.
It is important to use the correct size fuse for each circuit, as recommended by the manufacturer. If you are not sure what size fuse to use, consult with an electrician.
