Considerations for Renovating Electrical Circuits in Old Houses
It is essential to replace all wiring with copper core wires; partial modifications are not recommended;
Old aluminum wires in walls are prone to oxidation and overheating, posing hidden dangers;
Old air switches should be replaced with
new models with leakage protection;
Increase the number of sockets to avoid overloading and unstable voltage.
3. Suggested Wiring Layout for Renovation (Standard Three Rooms and One Hall)
Lighting Circuit ×1
Socket Circuit ×2
Kitchen Socket ×1 (for microwave, rice cooker, electric kettle, etc.)
Bathroom Socket ×1 (for washing machine, electric water heater)
Air Conditioning ×2 (living room/master bedroom)
Spare ×1 (for future installations)
✅ A total of 6~8 independent circuits is recommended, each corresponding to one air switch.
⚠ Safety Considerations
1. Common Mistakes Made by Electricians During Renovation
Connecting the live wire to the switch output: causes the lamp holder to remain live;
Ground wire not connected or incorrectly connected: cannot provide protection during leakage;
Sockets not securely connected: loose connections can easily cause fires;
Improper routing of visible wires: chaotic layout makes future tracing difficult.
2. Recommendations for Leakage Protection Device Selection
Common specifications: leakage action current 30mA, action time ≤0.1s
Prioritize installing leakage protection sockets in bathrooms/kitchens;
It is recommended to use branded leakage protection switches for the entire house, do not skimp on quality!