What size is that wiring, any­way?

The Family Handyman - - HOME CARE+ REPAIR -

If you’re adding an out­let, you need to use wire the same gauge as the ex­ist­ing wiring. How do you tell if your old wiring is 12-gauge or 14-gauge?

Here’s a sim­ple vis­ual. Twelve­g­auge is about the thick­ness of a nickel, and 14-gauge is about the thick­ness of a dime. Also, look at the breaker for the cir­cuit in ques­tion to see if it’s a

15-amp or a 20-amp breaker. A 20-amp cir­cuit re­quires wire that’s

12-gauge or larger.

14-gauge 12-gauge

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