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 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.
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.
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.
What is the purpose of a lighting contactor?
Lighting contactors are relay switches that control the flow of electricity through a circuit powering the lighting in a given area. They exist remotely and control circuits with higher voltages which can be dangerous to the operator, if controlled directly.
Can I replace a double pole contactor with a single pole contactor?
Yes, a 1 pole can be replaced by a 2 pole, and the 2 pole provides additional switching capabilities.
How to connect one phase motor to contactor?
In the above one phase motor wiring i first connect a 2 pole circuit breaker and after that i connect the supply to motor starter and then i do cont actor coil wiring with Normally Close push button switch and Normally Open push button switch and in last i do connection between capacitor start motor and contactor.
How does a 240V split phase circuit work?
In a 120/240V single split phase system, the two ungrounded (hot) legs are actually connected to the secondary winding of the distribution transformer. The transformer actually steps down the voltage to 240 volts, so the two legs are a complete 240 volt circuit.
How do you install a 240 volt circuit breaker?
Strip about 1/2 inch of insulation from each end of the two hot wires and the green ground wire, using wire strippers. If you are installing a 120/240-volt circuit, also strip the insulated white (neutral) wire. Connect each hot circuit wire to one of the terminals on the new 240-volt circuit breaker.
How is a contactor connected to a control circuit?
Often the control circuit is from a transformer which may be powered by the primary motor circuit, however the control circuit has it’s own over current protection, such as a fuse or circuit breaker. The control circuit typically is wired to a switch that will then send power to the coil of the relay contactor, which then turns on the motor.