For a 14-gauge copper wire, the maximum overcurrent protection rating is _____ amps.

• A. 30
• B. 15
• C. 20
• D. 25

Answer: (B)

The maximum overcurrent protection rating for a 14-gauge copper wire is 15 amps. This is based on the standards set by the National Electrical Code (NEC), which provides guidelines for safe electrical installations and the protection of conductors.

Using a 15-amp rating for 14-gauge wire ensures that the wire can safely carry the electrical load without overheating, which can lead to insulation failure or fire hazards. The ampacity of the wire, which indicates how much current it can safely carry, is critical for maintaining both the safety and functionality of the electrical system.

When selecting protective devices such as circuit breakers or fuses, it’s essential to adhere to these ratings to ensure that the electrical system operates within its designed limits. Therefore, protecting a 14-gauge copper wire with a 15-amp device is both the standard practice and the safest approach.