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

Answer 1

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.

Answer 2

The main difference between 10-2 and 10-3 wire is the number of conductors they have. 10-2 wire has two conductors, typically used for a hot wire and a neutral wire. 10-3 wire has three conductors, typically used for a hot wire, a neutral wire, and a ground wire.

Answer 3

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