The common faults of electric meter boxes mainly include the following:

Overload: When the load on the circuit exceeds the load capacity of the meter box, it can cause problems such as overheating, short circuits, and damage to wires and appliances.

Leakage: Due to electrical leakage or insulation damage, current may flow to the ground, causing leakage faults, which can also lead to wire overload.

Loose wiring: If the wire connectors in the meter box are not tightly connected, it can cause the wires to loosen, thereby affecting the normal operation of the equipment.

Circuit short circuit: Damage to wires, electrical appliances, etc. may cause a short circuit between two points in the circuit, posing a safety hazard.

Equipment malfunction: Components such as transformers, fuses, contactors, relays, etc. inside the meter box may fail due to aging or damage, leading to equipment malfunction.

To ensure the stability and safety of the power system, it is recommended to regularly inspect and maintain the meter box, and promptly address any malfunctions.