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Likely want to go 10GA wire, they are suggesting 30A fuse. The fuse is to protect the wire, the actual amperage is probably lower with your alternator likely producing 14V. You would want to make sure your relay or switch is rated for 30A, likely easier to use a relay, then the switch rating can be lower and use smaller wires from the relay to the switch.
The 30A is likely whats required for motor inrush current.
EDIT, You should be ok using 12GA wire, your distance is pretty short so low voltage drop.
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Last edited by 908/930; 08-21-2023 at 08:34 PM..
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