Question

Can I use a 20a fuse on a 15a circuit?

Answer 1

A 20-amp screw-in fuse is generally used for outlet and appliance circuits wired with 12-gauge wire. A 30-amp screw-in fuse is most commonly used for circuits supplying electric clothes dryers or air conditioners. These circuits are wired with 10-gauge wire.Nov 1, 2019

Screw-In Plug Fuses, Tamper-Proof Fuses, and Fuse Adapters

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Search for: What is a 20 amp fuse used for?

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The 15 amp slot is designed for handling current upto 15 amps so if you put a 20 amp fuse in a 15 amp slot and draw a current greater than 15 amps there will be heating and other issues like molten insulation you can put a 20 amp fuse only if u know that u are not going to draw more than 15 amps.