On Wed, 24 Mar 2021 17:17:07 +0000, Tim+ wrote:

This is the fuse box of a chap on Facebook who had a nasty experience
after getting an 7kW EV charger fitted.

I dont know enough to speculate on the cause but it there anything
glaringly wrong here.

https://www.amazon.co.uk/photos/share/
HMsmsBclYN4BpZwNC3mCqhBMutH239HHYn227WF3V0A


Loose connection at the busbar, probably at the RCD, though could be at
the first circuit breaker. There is a possibility that the busbar is not
in the cage. It is possible on those breakers for the busbar to be
touching the CB connection, but not tightened at all. Usually found soon
after once things start flickering, but on a car charger there wouldnt be
much of an indication of a poor connection.
The switch is a common sight, burnt out due to a poor connection. With
10mm cable, and poor quality switches, it can be difficult to get a
really tight connection. You think it is tight, twist the cable a little,
and it is loose again.It doesnt help when the screw heads start splitting/
breaking, so you cannot tighten it enough anyway.
Generally poorly installed.