If you are pulling enough power to melt the fuse box a little, there is a big issue. I would check the wires for shorting to the body, or as you seem to want to do, run new wires.
Do not bypass the fuse.
Search for what happens when you do. Some cars have burned to the ground over a failed aux. water pump. Some very nice cars. The fuse is doing it's job. Find the cause. Most likely a wire where it crosses a sharp point on the body.
(this could cause random issues as the wire moves when hitting bumps etc.)

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83 300SD Dark Silver Dark brown inside