Wiring Methods for Prefabricated Houses

Wiring in prefabricated houses can be carried out using the following methods depending on the situation, and it is essential to strictly adhere to safety regulations to avoid damaging the structure:

1. Wiring Through Ceiling Spaces

If the prefabricated house has a ceiling, wires can be routed through the space inside the ceiling. Ensure that the wire conduits are firmly fixed to prevent wire movement that could wear down the insulation. Additionally, the wires must have good insulation to prevent the risk of electric shock. Ceiling wiring is suitable for spaces such as living rooms and bedrooms, but maintenance access points should be reserved for future upkeep.

2. Wiring Through Wall Channels

When routing wires through wall channels, it is crucial to strictly avoid load-bearing walls and the connection areas between prefabricated floor slabs and walls to prevent compromising structural stability. Before cutting channels, confirm the wall type and use professional tools to create smooth, even slots. After cutting, promptly fill and repair the wall surface to maintain aesthetics. This method is suitable for connecting wires between different indoor areas, such as for outlets and switches.

3. Using Pre-drilled Holes in Prefabricated Panels

If the prefabricated panels have pre-drilled wire-passing holes, wires can be directly threaded through, provided the following conditions are met:

1. No burrs in the holes: To prevent damage to the wire insulation;
2. Use of insulating sleeves: To protect the wires from abrasion;
3. Appropriate hole diameter: To ensure that the wires and sleeves can pass through smoothly. This method is efficient but requires prior confirmation of the location and condition of the pre-drilled holes.

4. Wiring Through Panel Seams

If the prefabricated panels have no pre-drilled holes and the seams are wide enough, wire conduits can be laid within the seams. After threading the wires, fill and secure them with cement mortar. Note the following:

1. The wire conduits must be flame-retardant;
2. The cement mortar filling must be dense to prevent wire loosening;
3. The seam width must be sufficient for conduit installation. This method is suitable for prefabricated houses with wide panel seams.

5. Surface Wiring on Prefabricated Panels

If wiring needs to be laid on the surface of prefabricated panels, first fix flame-retardant wire conduits, thread the wires through, and secure the conduits firmly with pipe clamps. Note the following for this method:

1. The fixing interval for the conduits should not exceed 1 meter;
2. Avoid damaging the conduits during subsequent renovations;
3. The surface should be covered with a protective layer (e.g., tiles or flooring). This method is suitable for scenarios where there is no ceiling and wires need to be installed openly.

6. Concealed Wiring Within Floor Leveling Layers

When laying wires concealed within the floor leveling layer above the prefabricated panels, use galvanized steel pipes as wire conduits and meet the following requirements:

1. Strictly prohibit chiseling the prefabricated panels: Wire conduits should be laid along the surface of the panels to avoid damaging the floor structure;
2. Grounding connection: The wire conduits must be welded to the grounding grid and connected to the equipotential bonding box on the same floor;
3. Protective layer thickness: The floor leveling layer must cover the wire conduits with a thickness of at least 50mm. This method is suitable for scenarios where wires need to be hidden, but the construction complexity is relatively high.

Special Reminder: It is strictly prohibited to cut channels in prefabricated floor slabs for concealed wiring. Prefabricated floor slabs are hollow structures, and cutting channels can compromise their load-bearing capacity, leading to safety hazards. All wiring plans must comply with electrical installation regulations and be carried out by professionals.