Power Limited Circuit Cable Form 3

By itself wiring does not show if a circuit is power limited or non power limited.

Power limited circuit cable form 3.

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. Any circuit that is above 30v or 100 va is considered not to be power limited even if there is a protection device like a fuse or circuit breaker. What i am asking about is when power limited is part of the cable description.

The wiring has to be good enough for the type of circuit. If the power source is power limited the circuit is power limited. Class 1 2 and 3 circuits are classified as remote control signaling and power limited circuits in the national electrical code nec. 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.

That makes sense when talking about power limited circuits. I want to use this cable to supply two ac circuits to a remote location in the machine. They are considered to be a special condition other than a normal power circuit. This is a 2 pair 16 awg shielded cable from belden.

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. The national electrical code nec class 2 and class 3 covers remote control signaling and power limited circuits covered by chapter 7 in article 725. 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.