Hypothetically lets say you have a 24vdc 5a 120w power supply and you want to make a bench top variable power supply. You run it to the variable control module, potentiometers, binding posts, etc. Of course you want to put a fuse / breaker before the binding post (I assume that's the correct place) and I assume you want one after the 120v main line coming in.
My question is what size do you use?
Online calculators say Fuse rating = (watts/volts) x 1.25
So you would need a 1.25a fuse or next size higher to main line coming in
and you would need a 6.25a fuse right before the binding post
If this is correct ... wouldn't it be better to just stick with a 5a fuse OR one them Resettable Push Button Thermal Circuit Breaker Panel Mount to be on the safe side?