Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?
The correct answer is D: 15 amperes. The size of fuse or circuit breaker that would be appropriate to use with a circuit that uses AWG number 14 wiring is 15 amperes. AWG 14 wire is rated for 15 amperes. For amateur radio operators, this is essential electrical safety. Understanding this helps ensure safe electrical installation.
Exam Tip
AWG 14 wiring = 15 ampere fuse/breaker. Think '1'4 AWG = '1'5 amperes. AWG 14 wire is rated for 15 amperes, so fuse/breaker should be 15A. Not 30A, not 25A, not 20A - just 15A.
Memory Aid
"AWG 14 wiring = 15 ampere fuse/breaker. Think '1'4 AWG = '1'5 amperes. AWG 14 wire is rated for 15 amperes, so fuse/breaker should be 15A. Essential electrical safety requirement."
Real-World Application
A circuit using AWG number 14 wiring: AWG 14 wire is rated for 15 amperes. The fuse or circuit breaker should be 15 amperes to protect the wire. Using a larger fuse/breaker (e.g., 20A or 30A) would be unsafe - the wire could overheat before the fuse/breaker trips. 15 amperes is the appropriate size.
National Electrical CodeKey Concepts
Why Other Options Are Wrong
Option A (30 amperes): Incorrect. 30 amperes is too high - AWG 14 is rated for 15 amperes, not 30. 30A would be unsafe.
Option B (25 amperes): Incorrect. 25 amperes is too high - AWG 14 is rated for 15 amperes, not 25. 25A would be unsafe.
Option C (20 amperes): Incorrect. 20 amperes is too high - AWG 14 is rated for 15 amperes, not 20. 20A would be unsafe.
题目解析
The correct answer is D: 15 amperes. The size of fuse or circuit breaker that would be appropriate to use with a circuit that uses AWG number 14 wiring is 15 amperes. AWG 14 wire is rated for 15 amperes. For amateur radio operators, this is essential electrical safety. Understanding this helps ensure safe electrical installation.
考试技巧
AWG 14 wiring = 15 ampere fuse/breaker. Think '1'4 AWG = '1'5 amperes. AWG 14 wire is rated for 15 amperes, so fuse/breaker should be 15A. Not 30A, not 25A, not 20A - just 15A.
记忆口诀
AWG 14 wiring = 15 ampere fuse/breaker. Think '1'4 AWG = '1'5 amperes. AWG 14 wire is rated for 15 amperes, so fuse/breaker should be 15A. Essential electrical safety requirement.
实际应用示例
A circuit using AWG number 14 wiring: AWG 14 wire is rated for 15 amperes. The fuse or circuit breaker should be 15 amperes to protect the wire. Using a larger fuse/breaker (e.g., 20A or 30A) would be unsafe - the wire could overheat before the fuse/breaker trips. 15 amperes is the appropriate size.
错误选项分析
Option A (30 amperes): Incorrect. 30 amperes is too high - AWG 14 is rated for 15 amperes, not 30. 30A would be unsafe. Option B (25 amperes): Incorrect. 25 amperes is too high - AWG 14 is rated for 15 amperes, not 25. 25A would be unsafe. Option C (20 amperes): Incorrect. 20 amperes is too high - AWG 14 is rated for 15 amperes, not 20. 20A would be unsafe.
知识点
AWG number 14 wiring, 15 amperes, Fuse or circuit breaker, Wire rating
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.