SAFETY TIPS
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Here are some general safety tips for doing electrical work particularly on installations where you are dubious about the quality!
1: Test for live both before and after isolating.
Testing before isolating serves both to test your tester and to ensure that the power hasn't already been turned off by something other than the isolating device you are about to use.
2: Test neutrals for live both before and after disconnecting or cutting them.
Borrowed neutrals are all too common especially on lighting circuits
3: Always treat conductors as if they are live even after checking they are dead.
4: If possible make it difficult to re-energise cuircuits you are working on.
If not then at least make sure you warn anyone who might switch them back on.
read here too
Here are some general safety tips for doing electrical work particularly on installations where you are dubious about the quality!
1: Test for live both before and after isolating.
Testing before isolating serves both to test your tester and to ensure that the power hasn't already been turned off by something other than the isolating device you are about to use.
2: Test neutrals for live both before and after disconnecting or cutting them.
Borrowed neutrals are all too common especially on lighting circuits
3: Always treat conductors as if they are live even after checking they are dead.
4: If possible make it difficult to re-energise cuircuits you are working on.
If not then at least make sure you warn anyone who might switch them back on.