North Carolina Home Inspector Practice Exam

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What size wire is required for a 15-amp breaker?

The correct answer is: 14

For a 15-amp breaker, the appropriate wire size is 14-gauge wire. This sizing is based on the National Electrical Code (NEC), which provides guidelines to ensure safety and efficiency in electrical installations. The 14-gauge wire can safely handle currents up to 15 amps, making it suitable for typical residential circuits powered by a 15-amp breaker. It's essential to adhere to these standards to prevent overheating and reduce the risk of electrical fires. Larger wire sizes, such as 12-gauge, are not necessary for a 15-amp breaker and are typically used for circuits that require a higher capacity, such as 20 amps. Smaller wire sizes, like 16 and 18 gauges, are insufficient for handling a 15-amp load, as they could overheat and pose safety hazards.