How do you wire a contactor with a 120v coil?

Attach the wire coming from the 120 VAC electrical supply to the top screw terminal on the switch. Secure another wire to the second screw terminal on the switch. Attach the other end of that wire, to one of the screw terminals on the 120 VAC coil located on the contactor.

What are a1 and A2 on a contactor?

One side of the contactor coil (A2) is connected directly to one of the incoming power lines. The other side of the coil (A1) has two possible pathways to complete a connection to the other incoming power line.

Does a contactor need a neutral?

Where is going, what is switching? A1 and A2 is the coil – voltage depending on situation – 24v, 110v, 240v, 400v. 3 or 4 poles switched at the same time – 4 terminals at top, 4 at bottom, either way around.

Where is neutral on contactor?

It goes into the A2 slot on most contactors. This slot will be opposite from the A1 slot. The neutral wire completes the circuit so electricity can flow safely back toward the power supply.

What is the difference between a relay and a contactor?

A contactor joins 2 poles together, without a common circuit between them, while a relay has a common contact that connects to a neutral position. Additionally, contactors are commonly rated for up to 1000V, while relays are usually rated to only 250V.

Do contactors need 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 you run neutral through a contactor?

it is always a good practice to switch both line and neutral through the contactor. but if you can’t do it, then just switching the line will be acceptable.