Although wiring for a circuit is automatically sized according to load and voltage drop, you can adjust the size by changing the circuit rating.
If you have created permanent wiring, press TAB twice to highlight the circuit.
Wire Size parameters display, from left to right as hot conductors, neutral conductors, and ground conductors using the format: number of conductors - size.
For example 1-#12, describes a single #12 conductor.
You adjust the wire sizes by changing the value for the circuit Rating parameter.
The wire sizes are automatically updated.