On 27/01/2020 21:39, Dave Liquorice wrote:
On Mon, 27 Jan 2020 19:55:27 +0000, bert wrote:

You need a safety interlock to ensure that the cable only goes
live
once it is plugged-in to the car.

That's interesting as they don't have such safety devices on caravan
sites.

Yeah, I was wondering about all this nanny interlocking. I guess it's
because a car charging the cable is most likely will be left
coonected all the time and just dumped on the floor in all weathers.
People are lazy, coiling up to store neatly or put in the car just
ain't going to happen, particulary in the wet and when they'll only
be uncoiling it a few hours later on their return. A caravan power
cable will travel with the van.

When used with a motorhome, it could be unplugged and left in a puddle
or on wet grass, in the rain, each day.

Can't see why the car has to talk to the supply point. Easy enough to
have a "no load" switch that isolates the cable under no load
conditions and a button to set it when the cable is connected. Car
needs to know how much opwer is available? If power is on this pin -
x kW, that pin - y kW both pins z kW. Simples. No need to have some
electronics always on consuming power...

Yes, nice and simple.

SteveW