Power Limited Circuit Cable Form 3

The nec defines such circuits as that portion of the wiring system between the load side of the overcurrent protection device ocpd or the power limited supply and all connected equipment.

Power limited circuit cable form 3.

What i am asking about is when power limited is part of the cable description. 3043a multi conductor 300v power limited tray cable. For lv what you are asking about is class 2 power limited circuits which according to the nec means voltages of less than 30 volts and power of less than 100 va. In class 2 and class 3 systems either the voltage or the current depending upon circuit design is limited to a level that will not cause a fire and under.

Class 1 2 and 3 circuits are classified as remote control signaling and power limited circuits in the national electrical code nec. You can wire class 2 circuits with class 2 cable or any of its substitutes permitted by table 725 61 a depending on the condition of use. If the power source isn t limited the circuit is non power limited. I want to use this cable to supply two ac circuits to a remote location in the machine.

By itself wiring does not show if a circuit is power limited or non power limited. Wiring is it power limited or non power limited. That makes sense when talking about power limited circuits. Use class 3 circuits when the power demand for circuits over 30v exceeds 0 5va but is not more than 100va chapter 9 table 11.

They are considered to be a special condition other than a normal power circuit. If the power source is power limited the circuit is power limited. This is a 2 pair 16 awg shielded cable from belden.