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Fatal Incident - Safe Isolation failure?

What do we think on this incident, reported a bit differently in these two locations:

Whilst very sad and no-one should lose their life in the workplace (or anywhere else) I can't help thinking that an engineer of 30 years' experience should have been familiar with safe isolation procedures, and perhaps these were not followed.  There are of course many unreported possibilities such as multiple supply sources not identified but if you follow the mantra of poking a verified test device probe in before anything else (like your fingers or a screwdriver….), then your chances of falling victim are much reduced.

Parents
  • There’s a really good video on YouTube which I think is on the IET channel, but I cannot find it.

    A TNCS installation is proved dead with the main switch off, but there’s diverted current running through the earthing system, even with the main switch off as soon as the main earth is disconnected everything that is earthed within the installation becomes live. The conclusion is that the current Safe Isolation Procedure is not fit for purpose, the main earth conductor needs checking with a clamp meter for current.

    So it’s not only me that think the current procedure isn’t fit for purpose.

Reply
  • There’s a really good video on YouTube which I think is on the IET channel, but I cannot find it.

    A TNCS installation is proved dead with the main switch off, but there’s diverted current running through the earthing system, even with the main switch off as soon as the main earth is disconnected everything that is earthed within the installation becomes live. The conclusion is that the current Safe Isolation Procedure is not fit for purpose, the main earth conductor needs checking with a clamp meter for current.

    So it’s not only me that think the current procedure isn’t fit for purpose.

Children
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