Leakage Prevention in Container Houses

Preventing electrical leakage in container houses requires a comprehensive approach encompassing material selection, electrical design, insulation protection, grounding systems, and routine maintenance. Specific measures are as follows:

1. Select qualified materials and comply with design standards
The supporting structures (such as channel steel and columns) and wall materials of container houses must meet fire, water, and electrical leakage prevention standards. For example, the thickness of channel steel directly affects the load-bearing capacity and stability of the house, while wall sandwich panels should use A-grade fire-resistant materials like rock wool or glass wool, avoiding flammable materials such as polystyrene or polyurethane foam to reduce the risk of fire caused by electrical faults. The electrical system design must comply with national standards, with wires and cables using outdoor cross-linked polyethylene insulated flame-retardant cables that have independent insulation and sheath layers, a long-term operating temperature of no less than 105°C, and a rated insulation voltage rating one level higher than the actual voltage.

2. Standardize wiring and insulation protection
The power supply system wiring should use cables with different color codes to avoid confusion; cables should be protected with sleeves, and sockets and switch boxes should be metal galvanized and surface-mounted to reduce short-circuit risks. High-quality flame-retardant insulation mats with an insulation voltage of no less than 5kV should be laid in the gaps between channels and equipment cabinets inside the container, ensuring full coverage and neat trimming to prevent electric shock to personnel.

3. Improve grounding and lightning protection systems
All grounding posts must be kept clean (free of paint, rust, or welding spatter), welded to the container body for equipotential bonding, and connected to non-functional conductive conductors (such as metal casings) to form a reliable equipotential network. The roof should be equipped with a high-quality lightning protection system connected to no fewer than two grounding bars via grounding flat steel or round steel to ensure the safety of electrical equipment and personnel during lightning strikes. If the container is not within the original lightning protection coverage area, a separate lightning protection system must be installed.

4. Routine maintenance and safe usage
Regularly inspect electrical wiring to prevent aging or damage; keep heat sources and open flames away from container houses, maintaining a safe distance during hot work; equip both the interior and exterior with simple firefighting equipment, such as dry powder fire extinguishers. Additionally, maintain a minimum safety distance of 6 meters between container houses to prevent the spread of fire.

5. Case warnings and technological innovations
Some fire incidents have been caused by electrical wiring faults, such as electrical switch lines igniting weeds or short circuits inside mobile homes, highlighting the importance of compliant electrical design and fire-resistant materials. Companies like Nanjing Changyou Intelligence have addressed issues such as traditional container leakage and poor insulation through technologies like top-bottom integrated welding structures and built-in drainage systems, providing structural safeguards against electrical leakage.