If you’re looking to install lighting contactors for your commercial, industrial or residential building, you need a comprehensive guide to help you with the process. Square D 8903 lighting contactors are some of the most popular types of contactors used in buildings today. These contactors are reliable, durable and easy to install. In this article, we’ll explore the Square D 8903 lighting contactor wiring diagram so that you can get a clear picture of how to install them in your building.
What is a Square D 8903 Lighting Contactor?
A Square D 8903 lighting contactor is a type of electrical switch that is used to control lighting circuits. The contactor consists of a set of contacts that can be switched on and off using an electromagnet. When the electromagnet is energized, it causes the contacts to close, completing the circuit and turning on the lights.
These contactors are commonly used in commercial and industrial buildings where there is a need for multiple lighting circuits. They are also used in some residential applications where there is a need for a large amount of lighting or where the lighting needs to be controlled from multiple locations.
Parts of a Square D 8903 Lighting Contactor
A Square D 8903 lighting contactor consists of several parts. These include the following:
| Part | Description |
|---|---|
| Contactors | The contacts that are used to turn the lights on and off. |
| Electromagnet | The part of the contactor that creates the magnetic field that pulls the contacts together. |
| Coil | The part of the contactor that is energized by the electrical circuit to create the magnetic field. |
| Enclosure | The housing that houses the contactors, electromagnet and coil. |
Wiring Diagram for Square D 8903 Lighting Contactor
When wiring a Square D 8903 lighting contactor, it’s important to follow the wiring diagram provided with the contactor. This will ensure that the contactor is wired correctly and will work properly.
The wiring diagram for a Square D 8903 lighting contactor generally consists of the following:
Power Supply Wires
The first wires that need to be connected are the power supply wires. These wires provide the electrical power that is needed to energize the coil and create the magnetic field that pulls the contacts together. The power supply wires usually consist of two wires – a hot wire and a neutral wire.
Control Wires
The next wires to be connected are the control wires. These wires are used to energize the coil and create the magnetic field that pulls the contacts together. There are usually two control wires – one for each side of the coil.
Load Wires
The load wires are the wires that connect from the contactor to the lights. These wires usually consist of two wires – one for the hot side of the circuit and one for the neutral side of the circuit.
FAQs
Q. Can Square D 8903 lighting contactor be used for single-phase circuits?
A. Yes, Square D 8903 lighting contactors can be used for single-phase circuits. However, it’s important to make sure that the contactor is rated for the voltage and amperage of the circuit.
Q. How do I know if my Square D 8903 lighting contactor is working properly?
A. You can test your Square D 8903 lighting contactor by using a voltmeter to check for continuity across the contacts when the coil is energized. If there is continuity, the contactor is working properly.
Q. Can I install a Square D 8903 lighting contactor myself?
A. Yes, you can install a Square D 8903 lighting contactor yourself if you have basic electrical knowledge. However, it’s always recommended that you hire a licensed electrician to perform the installation.
Conclusion
Installing a Square D 8903 lighting contactor can greatly improve the efficiency and control of your lighting system. By following the wiring diagram provided with the contactor and ensuring that it’s installed correctly, you can enjoy the benefits of a reliable and efficient lighting system.
