What is special about a lighting contactor?
Lighting contactors are relay switches that control the flow of electricity through a circuit powering the lighting in a given area. A lighting contactor switch operates at a lower but safer load and controls the high voltage/current circuit using an electromagnet. Turn the power off for the entire system.
What is a 3 pole contactor?
3 pole contactors are electrically controlled switches (relays) used for switching an electrical power circuit. A contactor is typically controlled by a circuit which has a much lower power level than the switched circuit, such as a 24-volt coil electromagnet controlling a 220-volt motor switch.
Does a lighting contactor need a neutral?
In general, no, a it is not necessary that a lighting circuit, of which a contactor is a part, have a neutral conductor in all cases. The contactor must open all UN-grounded conductors. If the contactor is a single pole, then one of the current carrying conductors must be a groundED (not the groundING) conductor.
Do contactors wear out?
One of their hallmarks is reliability. However, like any other device, they are not infallible. In most cases, the contactor does not simply wear out from normal use. Usually, the reason for contactor failure is misapplication.
Can you use a 3 pole contactor in place of a 2 pole?
Can you replace a one pole or two pole contactor with a three pole? – Quora. Sure, you can just leave one pole unused if you like. Assuming everything else about them is the same – the contact voltage and current ratings, the coil voltage, and whether the contacts are NO or NC – then yes, absolutely you can.
Does a 3 phase contactor need a neutral?
In summary, as you could see by yourself, a three-phase system doesn’t require neutral wires nor ground wires for there to be a return path, because each phase conductor already acts as a return wire at different instants in time, even during unbalanced conditions or during a fault.
Can I use a 3 phase contactor for a single phase motor?
Yes you can. Feed your single phase in on one pole and then back thru the contactor on the second pole followed by thru the third pole. This will mean that you are going thru the contactor and overload three times which the overload will see as the same effect as a three phase motor being supplied.