2. Three wire control means, one wire for stop command ("NC" Pushbutton) and two wires for drive start command of "Forward and Reverse("NO" Push button)". In three wire control, the stop command is provided separately.

Why is it called 3 wire control?

The three-wire control circuit is the most widely used motor control circuit. ... This control circuit gets its name because of the auxiliary contacts that are connected in parallel with the start button. The auxiliary contacts seal in the circuit to keep the coil energized after the start push button is released.

What is wire control?

Control wiring is used to communicate commands and other information between control devices in a lighting system. ... Line-voltage wiring also can serve as a pathway for control signals.