Bit like those things you see clamped onto a water mains when people add an outside tap.
Just a lot more dangerous by the looks of it on the electrical front...
Best EV Chargers by Electrical2Go! The official electric vehicle charger supplier.
OFFICIAL SPONSORS
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc