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10 is the gauge of the wire, 2 and 3 are how many leads are in the wire. For instance 10-2 wire is 10 gauge with two leads, 10-3 is 10 gauge with three leads.

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13y ago
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Rich Ledinski

Lvl 2
1y ago

which one should i use to run my new a/c unit

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Q: What is difference between 10-2 and 10-3 wire?
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