Some thing I have not really come accross before but I have a Client looking at a renovation of an old Property. For various reasons including Western Power the Clients PME supply may be located in a Garage. However the House will be about 20 metres away from the Garage and the main consumer unit will be located in the house. I am assuming I would connect the Consumer unit as a TT to the garage with an earth rod located at the consumer unit at the house. There are loads of of awkward little things at this job and I dont know why the supply and consumer nit are worrying me