ROSSLYN, Va.—The National Electrical Manufacturers Association (NEMA) published NEMA SBP 4-2015 Low Frequency Audible Signals. This new white paper addresses the need for and the development of the low-frequency audible signal used in fire alarms, carbon monoxide (CO) alarms, and fire or CO alarm systems.
This document was developed by the Fire, Life Safety, Security, and Emergency Communication Section. It addresses why a low-frequency signal is needed, the difference between the low-frequency signal and the standard audible fire alarm signal, and when and where the low frequency signal is required.
NEMA SBP 4-2015 may be downloaded free of charge on the NEMA website.
Electrical Manufacturers Association (NEMA) represents nearly 350 electrical
equipment and medical imaging manufacturers that make safe, reliable, and efficient products
and systems. Our combined industries
account for 360,000 American jobs in more than 7,000 facilities covering every
state. Our industry produces $106 billion shipments of electrical equipment and
medical imaging technologies per year with $36 billion exports.