Problem solved!
0v at the wheel/chassis when switched on or off due to the simple fact of having an earth in the supply socket transforming the situation.
An hour ago measured the voltage at the road wheel with the same EHU cable connected to the same shed socket, 69.9v and 14.0v as a residual. Pull EHU cable out of socket and 0v.
Plug into a known earthed socket in the house and both readings are 0v.
Have since discovered we have 3 buildings all with no earth point but they are due to be either demolished or seriously repaired depending on the Brexit negotiations outcome. So in the same vein as all our other projects we have here in France we have decided to stop investing in what may or may not be our home in retirement until more is known. Providing this isn't a stupid idea I'll get three earth rods and wire each building into an RCB.
The unstinting expert help given by all on this thread is so typical of the goodwill here, a very big thank you indeed, and if we are here and you need an overnight on your way north or south we have plenty of space... but can't guarantee you can plug into the electrics!
0v at the wheel/chassis when switched on or off due to the simple fact of having an earth in the supply socket transforming the situation.
An hour ago measured the voltage at the road wheel with the same EHU cable connected to the same shed socket, 69.9v and 14.0v as a residual. Pull EHU cable out of socket and 0v.
Plug into a known earthed socket in the house and both readings are 0v.
Have since discovered we have 3 buildings all with no earth point but they are due to be either demolished or seriously repaired depending on the Brexit negotiations outcome. So in the same vein as all our other projects we have here in France we have decided to stop investing in what may or may not be our home in retirement until more is known. Providing this isn't a stupid idea I'll get three earth rods and wire each building into an RCB.
The unstinting expert help given by all on this thread is so typical of the goodwill here, a very big thank you indeed, and if we are here and you need an overnight on your way north or south we have plenty of space... but can't guarantee you can plug into the electrics!