How to Connect Wires in Container Houses

Connecting wires in container houses requires adherence to professional standards to ensure safety and compliance. Here are the specific methods:

I. Wire Connection Methods

1. Ordinary Twisting Method: Cross and tightly twist the copper wires of two wires together. This method is suitable for temporary or low-load scenarios, but it is essential to ensure tight twisting without exposed copper wires to avoid short-circuit risks.
2. Fireproof Tape Connection Method: Wrap insulating tape around the twisted wires, focusing on covering the joint area to prevent electric leakage or moisture damage. This method is suitable for dry environments and requires regular inspection for tape aging.
3. Wire Connector Cap Method: Use a specialized wire connector cap and pliers to insert the wires into the cap and then press tightly to form a sealed structure. This method is standardized and highly safe, recommended for long-term fixed wiring.

II. Power Access Process

1. Prerequisites:
   • Operations must be performed by a certified electrician wearing insulating shoes and gloves and using tools such as a voltage tester.
   • Calculate the total electrical load of the container (e.g., commonly 220V single-phase or 380V three-phase for residential containers) and clarify the electrical installation standards at the project location.
2. Equipment Selection and Planning:
   • Select cables (with a current-carrying capacity greater than the calculated current), circuit breakers (matching the cable cross-section), and auxiliary materials such as waterproof junction boxes and connectors based on the intended use.
   • For equipment containers, additional consideration should be given to heat dissipation requirements, and customized power solutions should be developed.
3. Installation of External Junction Boxes:
   • Choose a dry and easily accessible location with a closed base and a height of ≥50mm.
   • Cables should enter and exit from the bottom of the box, using waterproof PG heads, and the wall gaps should be sealed.

III. Circuit Layout Methods

1. Surface Wiring: Suitable for fully welded containers, with exposed wire troughs for easy maintenance but requiring attention to protection.
2. Concealed Wiring: For top-and-bottom welded and packaged containers, wires can be embedded in the walls or ceiling, which is aesthetically pleasing but complex to install.

IV. Common Wiring Methods and Precautions

1. Bottom Burial:
   • Wires should be inserted into insulating tubes, with ground wires meeting standards and a burial depth of ≥0.7 meters (as per specific regulations).
   • Outlets should be equipped with insulating protective sleeves to prevent wear.
2. Side Wiring:
   • When wiring through the side of the container, install insulating tubes at the wiring ports to prevent wire friction with metal.
3. Ceiling Wire Troughs:
   • Fix wire troughs to the ceiling, selecting an appropriate size and ensuring good grounding.
   • It is strictly prohibited to lay wires directly on the container roof: Sunlight and rain can cause aging and short circuits, and maintenance is difficult.

Safety Tip: All operations must comply with standards such as the "Low-Voltage Distribution Design Code." Regularly inspect the aging of wires and avoid overloading the electrical system.