On 26/11/2020 08:00, Andy Burns wrote:
F wrote:

We may be in need of a 7kW EV charging point in the fairly near future.

Anyone got any advice on* makes, installers (I assume it's not DiY to
a competent DiYer),

To qualify for the grant they have to be installed by someone on the
scheme.

what to avoid,

Rolec?

what to ensure? It's all new to me.

There are specific requirements about earthing for EVs, possibly
requiring a separate earth rod, particular RCBO type and carefully
keeping apart the house earth and car earth.

Bugger. Does that mean I would need two separate supplies for EV
and normal garage power (which might include an Air-water heat pump
at some point) ?

At the moment my garage is detached and separated from the house by
a metre wide path and the original builder? ran power into the garage
via some of that TUFF cable (not swa), 'professionally' installed inside
a 4 foot length of yellow plastic gas pipe, buried under the original
concrete path and curled up 90 degrees at each end. The house side
is clipped to the outside wall and goes through the cavity wall and into
the back of a single socket connected to the ring main via an FCU.
Garage end has another 13 amp FCU feeding lights and single socket.

I am about to replace the gas pipe with some 25mm black conduit but if
I need two separate cables then some 38mm stuff might be better.

The cable that Doncaster sell has 2-core or cat5E signal cable in the
same sheath, but how would the cat5e be 'split out' so that it connects
to the house network ?. This must be cutting the sheath of the main
cable and pulling the cat5e out before the cable enters a consumer
units or junction box ?.

I've been waiting for Adam to install one so he can illuminate us.

There are now several chargers that do all the earth handling
internally, and might be OK for DIY e.g.

https://myenergi.com/product/zappi

Look at a couple of EV videos on youtube by John Ward or Artisan Electrics.