What Does Nplfa Stand For

For example, a nonpower-limited fire alarm (NPLFA) circuit is a circuit that can’t operate at more than 600V. Neither power nor current for such circuits is limited. An NPLFA circuit is similar to a Class 1 circuit.

What is Nplfa and Plfa?

There are two different types of fire alarm system circuits, NPLFA and PLFA. NPLFA can operate at up to 600V with unlimited power output. A PLFA has limited voltage and power which is dictated by the listed power source.

What are some requirements for Nplfa circuits?

The power source of non-power-limited fire alarm circuits shall comply with Chapters 1 through 4, and the output voltage shall be not more than 600 volts, nominal. The fire alarm circuit disconnect shall be permitted to be secured in the “on” position.