Direct Answer • Key Takeaway
Here’s a Simple Visual. Twelve Gauge 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.