Final answer:
The ampacity for 12 AWG THWN copper wires is typically 25 amperes.
Step-by-step explanation:
The ampacity of a wire refers to the maximum amount of current that it can safely carry without overheating. In this case, we have 12 AWG THWN copper wires. The ampacity of 12 AWG THWN copper wires is typically 25 amperes.