On that Note, as I’m in the process of redesigning the garden, and allowing for EV is something I want to allow for, I have a long back garden with no current electric points, I will be putting Electric to a shed/garage at some point, what is needed for these free wall boxes EV Chargers ? Is an out door socket enough or does it need a 32amp supply of its own etc,
The first thing you will have to consider is you incoming supply older properties have a 60 amp supply later properties have a 80/100 amp supply, fortunately I had a 100 amp supply, if you only have a 60 amp supply you will need to contact your supplier for an upgrade.
For a 32 amp (7kW) circuit you will need 4mm2 armour plated cable which can run under paved areas or 450mm below exposed ground levels, or 16 amp (3.6kW)circuit will need 2.5mm. For a 22KW system you will need a new 3 phase incoming supply (expensive)
For very long runs you will there will be a voltage drop in that case use 6mm2 for 32 amp and 4mm2 for 16 amp.
Plus obviously a fuse consumer unit, with a 32 amp circuit you will be able to take a 16 amp supply from the consumer unit for your EV charger.
If you require a 32 amp EV charger I would use 10 mm2 armour cable.
Unfortunately I have suffered a brain injury and occasionally I get confused and often say the wrong thing.