In home decoration, the accident rate of electric shock and tripping caused by accidental injury of wires by nailing is as high as 37%. Based on electrical standards and practical experience, this paper explains in detail three professional methods for accurately detecting wires in walls to help you construct safely.
Method 1: hydropower drawing positioning method (accuracy 95%)
The hydropower construction drawing provided by the decoration company is the core basis:
Measurement and positioning: mark the horizontal/vertical extension area on the wall according to the pipeline position marked on the drawing with a tape measure.
Safety scope: Take the socket as the center, and avoid the "high-risk area" of 15cm from top to bottom, left and right.
Remedy for missing drawings: If the drawings are lost, you can contact the original decoration company for electronic filing.
Method 2: Instrument detection method (accuracy 80%-99%)
2.1 Professional wall detector
Working principle: detecting metal pipelines by electromagnetic waves.
Key points of operation: move along the wall at a uniform speed, and stop immediately in case of alarm sound (detection depth reaches 8cm).
2.2 non-contact measuring pen
Economic scheme: Suitable for thin wall inspection.
Operation skill: drill a 3mm shallow hole at the pre-nail position, and insert an electric pen to test whether it is charged.
Method 3: Empirical judgment method (accuracy 70%)
When tools are lacking, risks can be avoided according to the wiring rules:
Avoid "cross area": 30cm above and 30cm below all socket switches, and extend horizontally.
Listen to the sound and identify the position: tap the wall with a metal tool, and the hollow sound area may be wired.
Observation of cracks: 10cm along the longitudinal cracks on the wall surface (mostly at the slots of buried pipes) are prohibited from nailing.
Gold standard of safe construction
Power-off operation: power off the corresponding circuit before construction.
Layered drilling: drill a 2cm shallow hole for detection, and then go deep after confirming that there are no wires.
Emergency treatment: If plastic chips (pipes) are drilled, stop drilling immediately, and then operate when the deviation is ≥5cm.
Tool selection guide
Tool Type Applicable to Scene Accuracy Cost
Water and electricity drawings New house/with archive decoration
Wall detector old house/complex line
Simple suspension operation of contactless electric pen
Keep in mind that the three steps of "inspection, measurement and inspection" can reduce the risk of electric shock by 90%! It is recommended to collect this article and forward it to friends who are decorating.
