1、 Core components of the system
Household end: Connected from the electricity meter to the household main distribution box, the main switch uses a main circuit breaker with overload and short circuit protection as the main control node for the entire house’s electricity consumption.
Branch circuit: Split the circuit into lighting circuit, ordinary socket circuit, and high-power electrical dedicated circuit (air conditioning, electric water heater, etc.), and independently configure circuit breakers of corresponding specifications for each circuit to avoid single circuit faults affecting the power supply of the whole house.
Protection device: The entire house must be equipped with a leakage protector that complies with 3C certification, to achieve rapid power-off in the event of leakage or electric shock, and reduce the risk of personal injury.
End load: Covering various household electrical equipment, all metal shell appliances must be reliably grounded to form a complete safe electrical closed loop.
2、 Installation specification requirements
Wiring standards: The socket circuit uses single stranded insulated copper wire with a cross-sectional area of not less than 2.5 square millimeters, the lighting circuit uses single stranded insulated copper wire with a cross-sectional area of not less than 1.5 square millimeters, and high-power electrical appliances are separately equipped with dedicated lines to avoid line overload.
Installation of distribution box: The box body should be made of qualified iron sheet material, with a grounding resistance of ≤ 4 Ω. The internal wiring should be horizontal and vertical, with clear identification of phase lines, neutral lines, and ground lines. The wires should be protected by insulation rings to avoid damage to the insulation layer.
Protection device debugging: After the installation of the leakage protector is completed, it needs to be powered on and tested by pressing the test button to confirm reliable operation. It needs to be manually tested once a month and replaced immediately in case of failure.
3、 Key points for equipment selection
Circuit breakers: Plastic shell circuit breakers with rated current matching the total household load are selected for the main circuit, miniature circuit breakers with corresponding current specifications are selected for the branch circuits, and leakage protection circuit breakers with leakage protection are used for high-power circuits.
Cables and sockets: National standard oxygen free copper core cables should be preferred, and qualified products with rated 10A/16A should be selected for sockets. High power air conditioners and electric water heaters should be equipped with 16A dedicated sockets to prevent the use of three no electrical products.
Auxiliary accessories: Surge protectors can be installed as needed to resist the instantaneous overvoltage impact caused by lightning and power grid fluctuations, protecting precision household appliances from damage.
4、 Daily operation and safety precautions
Avoid privately pulling and randomly connecting wires, and connect multiple high-power appliances to the same socket at different times to prevent current overload and overheating of the circuit.
Wet hands and wet cloth are strictly prohibited from touching live sockets and switches. Flammable materials such as curtains and clothing should not be piled up around electrical appliances. High temperature electrical appliances should maintain a safe distance of at least half a meter from surrounding items.
Regularly check the aging condition of wires and electrical appliances, replace them in a timely manner if insulation layer damage or poor switch contact is found, and disconnect the main power switch of the household when going out for a long time.