What is the periodic testing frequency of a control valve switch?

Control valve supervisory switches must be tested to verify that they send a signal when the valve position changes (e.g., valve is closed). NFPA 72 requires this to be doneannually.

NFPA 72 (2022), Table 14.4.3.2 — Testing Frequencies:

Control valve supervisory switch:

Frequency:Annually

Method:Operate valve control; verify signal annunciation.

Correct answer: D. Annually

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