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Battery cable query

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Ok chaps so I’m gona finally sort out some wiring on my ‘86 90. Fitting Anderson connector for jump start, second battery with plug for camping etc, isolator switch for the winch. I’m also looking at replacing the earth and positive cables but I’m unsure if 170amp is enough or should I go higher rated?

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Sounds fine, except for isolator for winch and winch power and earth.

Winch motors can draw more than 175Amp for extended periods of time. Depending on the winch this can be up to 500A, so anything related to the winch should be in 70mm2 really.

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