TFM 12 Fire Alarm Technical Practice Test

The correct answer regarding the maximum voltage allowed in multi-conductor N.P.F.L.A (Non-Powered Fire Alarm) cables is 150 volts. This classification is significant because N.P.F.L.A cables are specifically designed for fire alarm systems and related applications where low voltage is safer and preferred to minimize risk in case of a fire. The 150-volt limit helps to ensure that the cables remain compliant with safety standards and are appropriate for their intended use in such critical systems.

Cables rated for 150 volts are suitable for general alarm, signal, and control circuits, and they help prevent electrical hazards in installations where higher voltages may create more dangerous situations. Fire alarm systems prioritize safety and reliability, meaning that the components, including wiring types such as N.P.F.L.A, need to adhere to these strict voltage qualifications.