Revisited Service Centre January 9 and they tested everything again and I was able to watch. You set the vehicle to charge at 32 amps, when you plug in the lead it does charge at 32 amps but the moment the lead is removed the vehicle reverts automatically to 72 amps. On replacing the lead it returns to 32 amps which they said is all normal and how the vehicle is set up. What they could not explain is why since November the breaker trips. They exchanged my charger lead with another they had (not a new one) and to date the breaker has not tripped since. One would then assume then the lead was the problem. I was advised by an E.S.A. Inspector that the safety rules regarding the home charging of all electric vehicles is under review and it is highly likely that all new installs will have to include a heat/smoke detector above the vehicle. For piece of mind I had them installed (cost $750.00) above my Tesla Model S and F150 Platinum Lightning.