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Wire ampacity/ wire sizing g

EFI Wiring Fundamentals

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Discussion and questions related to the course Motorsport Wiring Fundamentals

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Hello, I'm looking for a definitive way to determine proper wire size for TXL wire. A lot of the material I found online lean towards a larger than needed size. Any help would be appreciated.

The definitive way is to do your own testing. Determine the maximum current in your environments the wire can take before melting the insulation, or raising the resistance.

Is there a particular load or type of loads that you are questioning? Are we talking about a Starter Motor, Cooling Fan, or a sensor supply?

I find that connectors are often the limiting factor. Their limits are often clearly defined, and the size wires the terminals are designed to support give you a clue as to what size wire would be required.

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