https://merkindium-staging.apps.etardif.com/en/cours/renovating-a-rooms-wiring-from-a-to-z/diagnosing-existing-installation
Lesson 1 of 3
Diagnosing the existing installation
10:00Updated on August 18, 2026
Very easy
YouTubeVideo length: 10 minutes
Goal
Spot the risks and list what needs to be redone before starting the work.