Testing the Power of Blatchat again, any electrical engineers able to offer advice?
Our dishwasher packed up. The Hotpoint engineer plugged in his tester before starting work and advised that the earth impedance was too high for him to work safely on the machine so he went away.
I've tried good old Google and it looks as though we must have a TT system i.e. the earth is supplied by an earth spike rather than via the supply cable. We have an earth spike near the front door.
The bit I have trouble understanding is how a device plugged into a wall socket can detect this "high" impedance.
Also wondering if I can do anything to improve the earthing to get round the problem. I guess removing the paving blocks and driving in a new and maybe longer stake might do it? I'll photograph the top of the stake when it gets light tomorrow if it helps.
Any thoughts welcome as always, it's good to chat.