Electricity: what gauge of wire is common in household wiring?
Self-tutoring about household wiring: the tutor begins about the gauge of some.
One typical type of household wiring cable for indoor, 15-amp circuits in dry areas is NM 14-gauge. It’s white sheathed cable; inside are hot, neutral, and ground, each 14-gauge. Yellow has 12-gauge, for 20-amp circuits.
Source:
Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.