A fire alarm strobe flashes at a rate of 1 flash per second. What is the minimum flash rate per second for a visible notification appliance?

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Multiple Choice

A fire alarm strobe flashes at a rate of 1 flash per second. What is the minimum flash rate per second for a visible notification appliance?

Explanation:
Visible notification appliances must flash at a rate of at least one flash per second to be reliably noticed. If a fire alarm strobe is flashing at one flash per second, it meets the minimum requirement; slower rates would not satisfy the standard, while faster rates exceed the minimum but are still acceptable. So the minimum flash rate per second is one flash per second.

Visible notification appliances must flash at a rate of at least one flash per second to be reliably noticed. If a fire alarm strobe is flashing at one flash per second, it meets the minimum requirement; slower rates would not satisfy the standard, while faster rates exceed the minimum but are still acceptable. So the minimum flash rate per second is one flash per second.

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