Power In and Out for Container Houses

The power in and out of container houses are mainly achieved through professional electrical design and wiring systems, including key aspects such as power distribution systems, cable selection, wiring specifications, grounding, and lightning protection.

1. Power Distribution System Design
   The power distribution system of a container house is typically integrated internally, including an AC power distribution unit that distributes electrical energy from the mains or energy storage systems (such as battery packs) to devices like lighting, air conditioners, and fans. The design of the power distribution box must consider three-phase balance to ensure stable power supply and consumption. For example, in an energy storage system, the three-wire power supply of the power distribution box is sourced from the AC side of the energy storage converter, forming an independent power supply circuit.

2. Cable Selection and Wiring Specifications
   The power supply system requires the use of outdoor cross-linked polyethylene insulated flame-retardant cables with independent insulation and sheath layers, capable of operating at temperatures not lower than 105°C for extended periods, and with insulation withstand voltage values one level higher than the actual voltage. When wiring, cables should be identified with different colors for easy maintenance and inspection. Cable laying should avoid contact with high-temperature equipment and reserve sufficient length to the connection points (e.g., the endpoint of the access control signal line is the client's control cabinet).

3. Lighting and Emergency Systems
   Indoor lighting must be equipped with emergency lights that automatically activate during power outages, with effective lighting times meeting the standards of the "Fire Emergency Lighting and Evacuation Indication System" (GB 17945—2010), with a luminous flux not lower than 50Im. General lighting can use LED three-proof lights (dustproof, waterproof, explosion-proof) with a protection rating of IP65 or WF2 or higher, suitable for scenarios such as power distribution rooms and control rooms.

4. Grounding and Lightning Protection
   All grounding posts must be kept clean (free of paint and rust), welded to the container body at the same potential, and connected to no fewer than two grounding bars via grounding flat steel or round steel. A lightning protection system must be installed on the roof, complying with the requirements of the "Code for Design of Lightning Protection of Buildings" (GB 50057). If the container is not within the original lightning protection coverage area, a separate lightning protection device must be configured.

5. Insulation and Safety Protection
   Insulation mats with an insulation voltage not less than 5kV should be laid in the gaps between aisles and equipment cabinets, and cut neatly. Non-functional conductive conductors (such as metal casings) must be connected to the grounding copper bar to form a reliable equipotential, preventing electric shock risks.