What type of system should automatic-starting, engine-driven generators used for secondary power for a supervising station comply with, as per NFPA 72?

What type of system should automatic-starting, engine-driven generators used for secondary power for a supervising station comply with, as per NFPA 72?

• A. Type 60, Class 24, Level 2
• B. Type 60, Class 28, Level 1
• C. Type 60, Class 51, Level 2
• D. Type 60, Class 24, Level 3

Answer: (A)

NFPA 72 requires that automatic-starting, engine-driven generators used to supply secondary power for a supervising station meet the Type 60, Class 24, Level 2 specification. Type 60 identifies this as a standby power source for supervising stations. Class 24 specifies the size/duration requirements appropriate for continuous standby operation, typically ensuring enough runtime to keep the supervising station powered during a loss of primary power. Level 2 indicates the required level of monitoring and reliability for the power system, including automatic transfer and fault detection so the supervising station remains operable without manual intervention. This combination matches NFPA 72’s criteria for secondary power to supervising stations, while the other class or level options would not meet those specific requirements.

NFPA 72 requires that automatic-starting, engine-driven generators used to supply secondary power for a supervising station meet the Type 60, Class 24, Level 2 specification. Type 60 identifies this as a standby power source for supervising stations. Class 24 specifies the size/duration requirements appropriate for continuous standby operation, typically ensuring enough runtime to keep the supervising station powered during a loss of primary power. Level 2 indicates the required level of monitoring and reliability for the power system, including automatic transfer and fault detection so the supervising station remains operable without manual intervention. This combination matches NFPA 72’s criteria for secondary power to supervising stations, while the other class or level options would not meet those specific requirements.