The dedicated branch circuit for a fire alarm system must supply no other loads. Which option expresses this requirement most accurately?

The dedicated branch circuit for a fire alarm system must supply no other loads. Which option expresses this requirement most accurately?

• A. It must be fused at 15A.
• B. The circuit serves only the fire alarm system.
• C. It can share loads with other equipment.
• D. It must be protected by a ground fault interrupter.

Answer: (B)

A dedicated circuit is one that is reserved exclusively for the fire alarm system, with no other loads connected to it. This ensures the fire alarm equipment has a reliable, uninterrupted power source and isn’t affected by other devices or circuits in the building. That’s why the description “the circuit serves only the fire alarm system” is the most accurate expression of the requirement. The other points aren’t the defining feature: a specific fuse rating isn’t what makes the circuit dedicated, sharing loads would violate the dedicated nature, and GFCI protection isn’t the core requirement for a dedicated fire alarm circuit and can cause nuisance trips.

A dedicated circuit is one that is reserved exclusively for the fire alarm system, with no other loads connected to it. This ensures the fire alarm equipment has a reliable, uninterrupted power source and isn’t affected by other devices or circuits in the building. That’s why the description “the circuit serves only the fire alarm system” is the most accurate expression of the requirement.

The other points aren’t the defining feature: a specific fuse rating isn’t what makes the circuit dedicated, sharing loads would violate the dedicated nature, and GFCI protection isn’t the core requirement for a dedicated fire alarm circuit and can cause nuisance trips.