How to Rewire a Prefabricated Slab House

Rewiring a prefabricated slab house requires careful operation to avoid compromising structural safety. The following methods can be referenced for standardized renovation:

1. Avoid Cutting Horizontal Grooves; Prioritize Safe Wiring Methods

Cutting horizontal grooves on the surface of a prefabricated slab may damage the steel reinforcement protective layer, increasing the risk of fracture. It is advisable to prioritize wiring along slab joints or adopt surface-mounted wiring to minimize damage to the slab structure. If wiring needs to be passed through, it can be done by creating new holes for routing or running wires from the floor, avoiding direct cutting of horizontal grooves on the slab surface. For example, after snapping control lines on both sides of the wall, the wiring path can be planned along the slab joints to ensure no damage to the internal steel reinforcement.

2. Standardize the Wiring Process for Secondary Renovations

1. Measurement and Positioning: Before construction, snap control points and lines on walls, columns, and slabs based on renovation requirements to serve as construction references. For example, snap wall edge lines and 50 control lines on both sides of the wall to control surface layer construction during wall plastering, ensuring precise wiring layout.
2. Wiring Planning: Re-plan the wiring layout according to actual needs, replace aging wires, and add leakage protection devices. For concealed works such as water and electricity wiring, visual documentation should be retained, and joint acceptance and signing by the owner and supervisor should be completed before covering, ensuring traceability for future maintenance.

3. Be Rigorous in the Steps for Wire Replacement

1. Power Disconnection: Turn off the power supply by cutting off the main switch at the electrical panel or unplugging devices to ensure safety and avoid the risk of electric shock from live operations.
2. Removal of Old Wires: Remove the outer protective components of the prefabricated slab, confirm the position and connection method of the wires, disassemble plugs or connectors, carefully extract the old wires, and avoid damaging the internal structure.
3. Installation of New Wires: Select new wires that match the specifications of the original wires, pull them in through the slab entrance, connect them to plugs or connectors through the original conduit, and finally install the outer protective components to ensure a secure and well-insulated connection.

4. Strictly Adhere to Precautions

1. Material Selection: If new partition walls or additional walls need to be built, lightweight materials such as aerated concrete blocks or light steel keel gypsum boards should be used, with a thickness controlled within 120mm to avoid excessive concentrated loads causing slab surface cracking.
2. Safety Regulations: Ensure secure connections when replacing wires to avoid looseness or breakage; wear insulating gloves during operations to prevent accidents.
3. Long-term Monitoring: Within 1-2 years after the renovation, regularly inspect the prefabricated slab for new cracks or deformations, especially in areas beneath newly added walls or equipment, and address any issues promptly if found.