this post was submitted on 27 Jan 2024
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The benefit of the fusebin the plug is you can have a 1A fuse for a 1A appliance with a cable rated for 1A, and plug it into a socket rated for 10A.
If the appliance faults, then the wire doesnt catch fire.
If you dont have that, then all the wires have to be rated to 10A (or whatever the rating is).
And thats based on 1-breaker-per-socket.
If you have 2 sockets close to eachother on the opposite side of the house than the breaker panel, its easier and cheaper to wire them both together on 20A cable and a single 20A breaker. The fuses in the plug protect the 10A cable to the appliance, the 20A breaker protects the 20A cable in the wall.
Yes, you could put a fuse in the appliance (a lot have this).
But that isnt convenient for lamps, where it might be bulky to include a fuse holder and ruin the aesthetic.
Or something that deals with water, like submersible pumps or kettles.
Also, some appliances have swappable cables (IEC C13 for example). So if the appliance has an internal 10A fuse but is used with an IEC cable rated to 5A then it leaves the cable unprotected and a possible fire hazard.