How to Connect Wires in Container Houses

Connecting wires in container houses requires adherence to safety standards and professional methods. The core steps include planning the wiring, selecting appropriate connection methods, and ensuring proper insulation and grounding protection, as detailed below:

Wiring Planning and Material Selection

• Planning the wiring route: Based on the positions of electrical appliances inside the container house, plan the wiring route in advance. You can refer to the principles of household circuit piping layout, such as keeping the lines horizontal and vertical, to avoid damage to the piping during subsequent decoration. Alternatively, you can adopt a point-to-point approach, running the piping directly from the distribution box to the electrical points in a straight line to reduce wiring length and cost.
• Selecting appropriate wires and cables: The wires and cables in the power supply system should be outdoor-type cross-linked polyethylene insulated flame-retardant cables marked with different colors. The cables should have independent insulation and sheath layers, with a long-term operating temperature not lower than 105°C. The rated insulation withstand voltage of the wires and cables should be one level higher than the actual voltage.

Connection Methods

• Twisting and tinning method: Connect the wires together according to the twisting requirements, then apply tin to the exposed twisted part to fix the joint and prevent the wire joint from loosening. Finally, use insulating tape to insulate the connection.
• Twist-on wire connector method: Select dedicated wire connectors, cut off the insulation at the ends of the wires to expose the copper cores, insert the copper cores into the connectors, and use a dedicated twisting wrench to tighten the interior, securing the wires and preventing loosening and poor electrical connections.
• Wire cap method: Cut off the insulation at the ends of the wires to expose the copper cores, insert the copper cores into the wire caps, and then use a wire crimping tool to crimp them tightly, securing the wires.

Insulation and Grounding Protection

• Internal insulation protection: Lay high-quality flame-retardant insulating mats with an insulation voltage of not less than 5kV in the aisles of the battery room in the container house. The mats should cover the entire aisles and the gaps between equipment cabinets in the container and be neatly trimmed.
• Grounding treatment: All grounding posts must not have paint, rust, or welding beads. Ensure good contact between the grounding cables and the grounding posts. All grounding posts inside the container should be welded to the container body to maintain equipotential bonding. At the same time, the grounding copper bar of the container should be connected to the non-functional conductive conductors of the entire container to form a reliable equipotential bond. All grounding points must be clearly marked.