Container House Leakage Protection Device
The leakage protection device for container houses is mainly achieved through measures such as installing leakage protection sockets, configuring grounding systems, and using anti-static floors.
Leakage protection sockets are one of the key devices for preventing electrical leakage in container houses. For example, GFCI leakage protection sockets (American standard, American specification, American-style sockets) can quickly cut off the power supply when detecting electrical leakage, preventing electric shock accidents. These sockets usually have high sensitivity and can respond quickly when the leakage current reaches the set value (e.g., 30mA), ensuring electrical safety.
The grounding system is the foundation of electrical safety in container houses. According to specifications, all electrical equipment inside the container must be reliably grounded, and the grounding resistance should not exceed 4Ω. Specific measures include:
- Grounding grid laying: Lay dedicated grounding copper bars in the lower layer of the anti-static floor inside the container to form an equipotential grounding grid and connect it to the external main grounding grid through copper cables.
- Equipment grounding: Internal components of electrical equipment and cable shielding layers should be connected to the equipment's own grounding copper bar through yellow-green bicolored grounding wires and then to the equipotential grounding grid inside the container. Series grounding is strictly prohibited.
- Grounding point setting: The container should provide at least 2 grounding points that comply with electrical standards, located at diagonal positions to ensure grounding reliability.
The application of anti-static floors can effectively reduce static electricity accumulation and lower the risk of damage to electronic equipment caused by static electricity. The system resistance value of anti-static floors should be controlled within the range of 1×10⁶ to 1×10⁹Ω, and the surface resistance value should be between 2.5×10⁴ and 1.0×10⁹Ω to ensure that the static voltage does not exceed 2500V (at a temperature of 21±1.5℃ and a relative humidity of 30%).
In addition, the electrical design of container houses should also comply with national standards, such as using flame-retardant cables, setting up emergency lighting, and configuring fire protection systems to enhance overall electrical safety. For example, emergency lighting fixtures should meet the requirements of the "Fire Emergency Lighting and Evacuation Indication System" (GB 17945—2010) to ensure immediate operation in case of a power outage.
