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Common Sense Routing
Power Braid, electrical tape, and heat shrink may protect wiring, but so does common sense. Enthusiasts go to great lengths to protect wiring, yet they will route wiring through sharp metal body passages and never consider the consequences of chaffing. Always protect wiring through transitions via urethane and plastic grommets. Rubber grommets don't always protect because they can dry rot and fail. Urethane grommets and soft plastic transitions work best.
One more thing-there are no unimportant wires. Black ground wires must always be grounded for best results. Poor grounding leads to all kinds of electrical system gremlins, like dim lights, intermittent operation, ignition failure, computer glitches, and more. Make sure everything is properly grounded, including that ground strap between the engine and firewall.