Lighting Wiring for Housing Prefabricated Panels

There are several common wiring methods for lighting in housing prefabricated panels:

1. Trenching and Wiring in Prefabricated Panels During the manufacturing stage of prefabricated floor slabs, trenches are pre-cut inside the slabs, and electrical wires are laid within these trenches. The depth and width of the trenches must strictly adhere to electrical wiring specifications. For example, the depth should ensure that the outer insulation of the wires is not damaged, and the width should match the quantity and specifications of the wires. The location of the trenches should avoid the load-bearing structures of the floor slabs to prevent weakening their load-bearing capacity. This method is suitable for situations where wiring has been planned during the design stage of the floor slabs, enabling concealed installation. However, attention should be paid to sealing the trenches to prevent water seepage or insect and ant infestation in the later stages.

2. Pre-reserving Wire Openings in Prefabricated Panels During the production of prefabricated floor slabs, wire openings (such as wire-passing holes or slots) are pre-reserved at specific locations. During installation, the wires are led out through these openings. This method eliminates the need for on-site trenching, reducing damage to the floor slab structure. However, precise control over the location and depth of the openings is required. For example, the openings should avoid the joints between floor slabs to prevent wire breakage due to settlement. The depth should ensure a safe distance between the outer layer of the wires and the surface of the floor slabs to avoid damaging the wires during subsequent renovations (such as laying floor tiles).

3. Wiring Through Existing Holes in Prefabricated Panels For local lighting such as pendant lights, holes can be directly drilled at the light installation locations, allowing the wires to pass through existing holes in the prefabricated panels (such as steel bar reserved holes or construction holes). This method is suitable for lighting fixtures with clearly defined locations. However, attention should be paid to matching the diameter of the holes with the specifications of the wires to prevent insulation damage due to friction. Additionally, the holes should be sealed after wiring to prevent dust or moisture intrusion.

4. Drilling and Wiring at the Junction of Floor Slabs and Walls Holes are drilled at the junction of the floor slab where the light is to be placed and the wall, and the wires are threaded through the gap between the floor slab and the wall. This method is suitable for later renovations or temporary wiring. However, it is essential to ensure that the hole locations avoid the main reinforcement bars of the floor slabs to prevent structural damage. After wiring, the holes should be sealed with fire-resistant materials to prevent the spread of fire.

Construction Precautions: Regardless of the method used, it is crucial to avoid cracking at the wire openings due to improper construction (such as drilling position deviations or excessive force when tightening screws) or material quality issues (such as aging of the wire insulation). It is recommended to conduct a structural safety assessment before construction, select wires and accessories that comply with national standards, and have the work carried out by professional electricians to ensure that the wiring meets electrical safety specifications.