RE: Earth Resistance Issues
All this talk around earth spikes and resistance is decidedly confusing. Prior to installation of my wall charger the engineer inspection included a check on earth resistance and I was told it was surprisingly low! Good news, you would think. But then I was told I needed an earth spike anyway. Whether this was because the charger was externally mouinted, I don't know. During the installation the spike was driven into the middle of my narrow pathway and stands proud, a hazard ready to trip the unsuspecting visitor and likely to get damaged. It could just as easily have been put just round the corner in a flowerbed.
Now for the tricky bit. As my Fluence cannot control charging time and nor can the BG charger I can either get up in the middle of the night to start the charge at offpeak rate or I can have a timer installed on my switchboard. The electrician who came to do this job expressed 1) dismay at the job BG had done with the wiring and 2) horror that an earth spike had been fitted as he is adamant that, with my type of electrical system, the earth spike means two separate groundings where a circuit failure leading to current running down one will cause that same current to rise up the other with disastrous results. Perhaps he was going over the top, but he hinted that what had been done was illegal.
Anyone fancy commenting?