Should use thick or thin wire in an electric fuse?

Answer 1

Every fuse is rated for some certain current. The rating is the maximum current

that can flow through the fuse before the wire in it gets so hot that it melts and

opens the circuit. (In the arcane jargon of the high-tech world of engineering,

especially electrical, this event is described by saying that the fuse "blew".)

The thinner the wire is, the less current it can conduct before the wire melts.

The thicker the wire is, the more current it can carry before the wire melts.

So, the wire you select for your fuse completely depends on the current for

which you want to rate your fuse, and above which you want it to "blow".

Answer 2

Thin wire is typically used in an electric fuse because it has higher resistance and can break easily when subjected to excessive current, thereby protecting the circuit from damage. Thicker wire would have lower resistance and could result in excessive current passing through the circuit before the fuse breaks, potentially causing damage or overheating.