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Old 04-24-2020, 05:02 PM   #108 (permalink)
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ND Miata - '15 Mazda MX-5 Special Package
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Generally speaking, I find the size and cost difference between 10 and 12 to be so small that I run the larger gauge. Doesn't sound like you'll be pulling more than 20A but it's going to be continuous, and that power loss is all going to be heat. 3% of 300w is just under 10w... that wire might get a little warm on longer drives.
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