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2026. 6. 30. 작업

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What can I do to combat wire embrittlement?

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Heat and thermal stress, even at engine bay temperatures, is not generally the cause of copper wire failure. There is "hydrogen embrittlement" for copper but that only really comes into play at 400C+ in hydrogen-rich environments, usually during annealing. Also, the 20-30C higher range from your hotter climate is pretty negligible from copper's point of view. Copper's linear thermal expansion coefficient is roughly 17 micrometers / meter / degree C (off the top of my head, you can look it up though). It's very negligible in the lengths found in most wiring applications and especially negligible when the wire is just hanging there with plenty of space to expand/contract without inducing mechanical stress. Copper is also specifically chosen for wiring because of its high tensile strength and great durability, not just its high electrical conductivity. Aluminum, for example, is a lot cheaper, makes perfectly fine wiring, but has a lower tensile strength and higher thermal expansion coeffi