Wiring for Concrete Prefabricated Houses

The embedding and wiring of electrical wires in concrete prefabricated houses require comprehensive control from aspects such as material selection, position fixation, wiring methods, construction specifications, and handling of special scenarios. The specific key points are as follows:

1. Selection of Embedded Materials
For conduit materials, it is advisable to prioritize flexible PVC pipes, which can be bent into shape without tools, are highly impact-resistant, and less prone to breakage, effectively protecting the internal wires. For wires, PVC-insulated wires are recommended due to their low cost, high durability, and good safety, meeting long-term usage requirements.

2. Embedded Positions and Fixation

• Floor Conduits: The conduits for ceiling lights should be embedded before concrete pouring, positioned between the lower and upper reinforcement bars of the floor slab to ensure they are in the vertical middle of the slab. They should be fixed to the reinforcement bars with zip ties or wire to prevent displacement during pouring.
• Box Installation: Lighting boxes should be fixed to the floor slab formwork, while boxes for switches, sockets, weak current, and distribution boxes should be embedded in the bottom slab of the current floor. The interiors of the boxes should be filled with waste paper to prevent concrete from entering and causing blockages.
• Vertical Conduits: These should have 90-degree rounded bends and, after connecting with the bends extending from the floor slab, be fixed to the reinforcement bars of the concrete structure or post-built walls, ensuring no sharp angles at the bends to avoid damaging the wires.

3. Wiring Methods

• Recessed Wiring: Mark the positions on the wall in advance and control the groove depth at 4cm. The wire grooves should be kept parallel or perpendicular to avoid a messy appearance. After embedding the conduits, they should be set deeper than the wall surface by 0.5cm to facilitate subsequent plastering and protect against wall cracking.
• Optimization for Rural Self-Built Houses: Wires and network cables under floor tiles can be laid separately to reduce damage to the floor concrete and facilitate future maintenance.
• Adaptation for Simple Cement Houses: Adjust the positions of sockets and switches according to living habits. For example, increase the number of sockets in high-frequency usage areas like kitchens and bathrooms and reserve space for future electrical appliance expansions.

4. Construction Precautions

• Drawing Verification: Before embedding, strictly follow the water and electricity pipeline drawings to ensure accurate horizontal and vertical orientations of the conduits and avoid cross interference.
• Circuit Stability: During construction, keep the power supply wires separate from the load wires to prevent confusion that could lead to poor contact or short circuits. The wire connections should be secure to avoid loose connections that could pose safety hazards.
• Position Marking: After confirming the positions of lights, sockets, drainage pipes, etc., mark them with paint and fix the boxes to ensure the later installation matches the design.

5. Handling of Special Scenarios
For rural self-built houses or simple houses, flexible adjustments should be made according to actual needs: for example, reducing floor grooving to protect the structure or selecting waterproof boxes and wires for humid areas like bathrooms to enhance safety.