Some interesting reports there.

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The contracts manager contacted the network owner to find out if electrical services were in the area where they were digging, and a verbal reply from his office was that there were no cables. The following day work began on digging holes and on the third hole an air hammer struck an 11,000 volt cable.

Once again the contractor failed to obtain clear assurance that the area was safe to work.
A written confirmation would provide suitable evidence that inquiries were made, but I would place the blame with the network employee who apparently told the colntractor that the area was clear without bothering to check properly.

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A 15 year old youth received serious burns when he made contact with live parts on a berm mounted 11kV oil switch unit. It would appear that the busbar extension end cover had been removed previously by unauthorised persons. The youth was removing the heat shrink cover from one of the busbars when a flashover occurred. In order to ensure better protection from such vandalism of electrical equipment in the public environment, the use of anti tamper type fixing screws on covers needs to be considered
It's sad to think that vandal-proof fixings are now necessary in such cases. What part of "Danger - High voltage" did he not understand? [Linked Image]