Fuse wire has a lower melting point, so it melts first when there is too much current, saving your appliances. Connecting wire is thicker and can handle more. It's like the safety valve on our old compressor at the plant—better one small part to fail than the whole machine. I've seen what happens when someone uses a thick wire in the fuse box, the whole wiring catches fire, just like last monsoon in our lane.
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