What is the maximum allowable ampacity for a #12 AWG copper wire?

The maximum allowable ampacity for a #12 AWG copper wire is 20 amps. This value is determined based on the National Electrical Code (NEC) guidelines, which consider various factors for wire rating, including the type of insulation, ambient temperature, and whether it's in a conduit among others.

In general, #12 AWG copper wire is widely recognized for its safe capacity in residential and commercial applications, typically allowing for a maximum load of 20 amps under normal conditions. This ensures that circuits can operate safely without overheating, which is essential for preventing electrical fires and maintaining system reliability. Understanding this ampacity is crucial for anyone working with electrical systems, as it helps in selecting the appropriate wire size for different applications while adhering to code requirements.

While other values are presented in the choices, they do not align with the established ampacity limits set forth by electrical standards.