Circuit breakers are an important component of household current. It can protect the circuit from damage. When it detects a fault, it will cut off the current. If there is no circuit breaker, you and your house may be injured. Understanding the ability of circuit breaker wiring will provide a great guarantee for the safety of home circuits. From this guide to the information, you will gain basic knowledge of wiring circuit breakers.
The step-by-step process of circuit breaker wiring
1.Preparation work before connection
- Before operation, the power must be cut off and a multimeter must be used to confirm that there is no voltage in the circuit to avoid the risk of electric shock
- Wear protective equipment such as insulated gloves and goggles to ensure a dry and well ventilated operating environment
- Essential tools: screwdriver, wire stripper, multimeter, drill, etc
- Ensure that the circuit breaker model matches the circuit and the wire cross-sectional area meets the load requirements
2.Route planning and identification
- Clarify the incoming and outgoing directions of the circuit breaker
- Distinguish between live wire (L), neutral wire (N), and ground wire (PE) and mark them properly to avoid wiring confusion
3.Remove the circuit breaker from the panel
- Use a screwdriver to remove the fixing screws on the front cover plate of the distribution box where the circuit breaker is located, carefully move the panel away, and avoid touching other live parts inside
- Loosen the screws on the upper and lower wiring terminals of the circuit breaker, and remove the live wire, neutral wire, and ground wire
- Most circuit breakers are fixed by bottom clips or rails. Gently pry open the blue buckle under the circuit breaker with a screwdriver and pull out the circuit breaker at the same time; If it is a rail mounted type, the circuit breaker needs to be slid along the rail to one side and removed
4.Install circuit breaker panel
- When no pre-installed guide rail exists in the distribution box, then the guide rail should be clamped horizontally in the designated place on the bottom plate for tightness and without shaking; Finally, clip the circuit breaker onto the guide rail and secure firmly
5.Connect the cable to the main circuit breaker
- Connect various cables (such as power lines, including live and neutral wires) and grounding wires to the main circuit breaker. Be careful when connecting wires to circuit breakers.
6.Connect the branch circuit breaker
- Connect the various cable wires of the main circuit breaker to the branch circuit breaker and connect the neutral wire.
7.Cover the circuit breaker panel and conduct testing
- Perform testing, such as connecting all circuits to the main circuit breaker. To avoid power surges, please open the circuit breakers one by one or tighten all screws.
Conclusion
Energization of circuit breakers is an electric process requiring extremely high safety caution. Perform proper selection, installation, and testing of circuit breakers upon installation and application to ensure safe circuit operation. Immediately inspect and take corresponding maintenance measures upon occurrence of any anomaly to avoid incurring greater losses.
FAQ
How to decide on a model of circuit breaker to utilize?
In selecting a circuit breaker, it should be done in accordance with the rated power, current load, and environmental conditions of the electrical equipment.
What are safety measures in installing circuit breakers?
Power outage, wearing protective equipment, and the use of insulated tools are bare minimum safety measures.
How to test if the circuit breaker is working appropriately?
By simulating overload situations, one can check whether the circuit breaker has the capacity to trip in time.
Can the circuit breaker be fixed?
Minor faults can be fixed, but if the circuit breaker is severely damaged, it is best to get a new one.
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