John Peckham:
I am thinking that the ground is sitting at around 0V and the outside tap is at 187V with respect to the general mass of earth as I cannot see the line to earth fault lifting the voltage of the general mass of earth to 187V some distance away from the site of the fault.
If the copper water pipe in the house is bonded it is directly connected to the transformer neutral so how can it sit at 187V to Earth?
If the water pipe is not bonded and/or the transformer earth is disconnected then that is a different story.
I would like to think that the DNO would have checked the transformer earthing.
It was I who asked whether there was a common metal water supply and I don't think that Lyle has answered that one, but if that is the case, the absence of adequate main bonding in the house would explain the situation.
John Peckham:
I am thinking that the ground is sitting at around 0V and the outside tap is at 187V with respect to the general mass of earth as I cannot see the line to earth fault lifting the voltage of the general mass of earth to 187V some distance away from the site of the fault.
If the copper water pipe in the house is bonded it is directly connected to the transformer neutral so how can it sit at 187V to Earth?
If the water pipe is not bonded and/or the transformer earth is disconnected then that is a different story.
I would like to think that the DNO would have checked the transformer earthing.
It was I who asked whether there was a common metal water supply and I don't think that Lyle has answered that one, but if that is the case, the absence of adequate main bonding in the house would explain the situation.
We're about to take you to the IET registration website. Don't worry though, you'll be sent straight back to the community after completing the registration.
Continue to the IET registration site