Container House External Line

The external line of a container house generally refers to the wiring system that connects the container house to an external power source, which needs to be designed and installed according to the purpose of the house, power requirements, and safety regulations. Here are the specific details:

1. Basics of External Line Design
The external line of a container house must meet the power requirements of electrical equipment. For example, the customized packing-box unit (with dimensions of 3m×6m×2.9m) from Shandong Wanqing Integrated Housing has pre-installed circuits inside, including sockets, lights, and switches. Users only need to connect the external line to use it, which is suitable for temporary offices on construction sites or employee dormitories. If it is used for high-power equipment (such as air conditioners and welding machines), the current load needs to be calculated separately, appropriate cable diameters (such as copper wires) need to be selected, and overload protection devices need to be configured.

2. Safety Regulations and Material Selection
External line safety is crucial. According to fire safety regulations, container houses should be filled with Class A fire-resistant materials such as rock wool boards and fireproof cotton. The external line cables need to be equipped with protective sleeves, and the socket and switch boxes should be made of metal galvanized material and installed in an exposed manner to reduce the risk of fire. For example, the Yazhi packing-box unit (an economical model with dimensions of 6058mm×2438mm×2800mm) has pre-buried circuits and can be used immediately upon placement. However, it is necessary to ensure that the insulation performance of the circuits meets the standards to avoid short circuits that could cause fires.

3. Installation and Grounding Requirements
The installation of the external line should be carried out by professional electricians to ensure proper grounding. The metal shell of the container house needs to be reliably connected to the grounding electrode to prevent lightning strikes or electric leakage. For example, when customizing container houses in Hubei, it is necessary to check the steel thickness of the main beams and columns (usually ≥3mm), whether the welding process is full without cold welds, and whether the container body has been galvanized or coated with anti-corrosion treatment as a whole. These details directly affect the stability and safety of the external line system.

4. Applications in Special Scenarios
In disaster relief or temporary medical scenarios, such as the Yazhi packing-box unit export project to Japan, the external line needs to meet the requirements for rapid deployment. It adopts a modular design with pre-buried circuits and standard plugs to ensure that installation can be completed within 20 days after placement. In addition, the spacing between container houses should be ≥6 meters to reduce the risk of fire spread, and simple fire-fighting equipment should be provided.