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Electrics can look fine and still not be safe
Most faults are hidden behind a faceplate or inside a wall. Why every job starts with testing.
By Joseph Lawrence · 18th Edition (BS 7671) · 3 min read
What you can see
New faceplates, a tidy board, a fresh coat of paint. None of it tells you whether the earth is connected, whether a cable has been damaged behind the plaster, or whether a joint in the loft is overheating.
What a tester sees
Continuity, insulation resistance, polarity, the earth fault loop and the time the RCD takes to trip. Each has a limit in BS 7671. A circuit either passes or it does not.
Why it matters for small jobs too
Adding a socket to a circuit with a lost earth makes a dangerous circuit bigger. So even a single socket gets tested before and after, and you get the readings.
