NICET Fire Alarm Practice Exam

Question: 1 / 400

What is the minimum wire gauge for single conductors in a fire alarm system?

16 AWG

20 AWG

18 AWG

In fire alarm systems, the minimum wire gauge for single conductors is typically 18 AWG. This standard ensures that the conductors can handle the necessary current load while also being appropriately sized to minimize voltage drop over the distances involved in typical fire alarm installations. Additionally, using 18 AWG wire complies with the National Electrical Code (NEC) requirements for low-voltage installations, including fire alarm systems, which emphasizes reliability and safety.

Choosing a wire gauge that is too small can lead to issues such as increased resistance, which could affect the operation of the alarm system during an emergency situation. Therefore, 18 AWG is deemed sufficient for the majority of fire alarm devices while maintaining compliance with safety regulations.

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14 AWG

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