Trying to cross the "t"s etc. before having the EV charger installed. As is always the case there are some spanners to get rid of
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The existing CU is remote from the meter, 7m tails with a 100A sub main switch at the meter end. TT earth with an unprotected 2.5mm cable coming out of the wall and disappearing under ground, no idea where the rod itself is. No label on the incomer fuse.
Charging point is to go outside the wall the meter is fixed to. The CU position would mean an extra charge for a long run.
Also want to have fitted a 16A socket for the motor home.
Rather that cable back to the CU the sparks recommended a second 7 way Wylex NM CU next to the meter. Henley block in the tails to the Sub Main Switch.
The DNO (UK Power Networks) inform me the tails to the meter are too small (16mm2) for the 100A fuse that would be needed. They had been booked to come and check the earth and uprate the fuse (if required) but CV19 means only essential work being done. Doesn't a dodgy earth count as a safety issue?
Sparks was to fit a Wylex NML CU but doesn't a TT earth mean a metal CU needs a RCD? That plus the isolator means a 7 way CU is only good for three circuits.
I know it won't work independently of the incoming supply but doesn't Solar PV constitute a second voltage source? No warning on the sub main that one exists.
I'm trying to coordinate EV charger, DNO attending and a Smart Meter install all together. I didn't hold up much hope but the Virus has made this even more unlikely
The existing CU is remote from the meter, 7m tails with a 100A sub main switch at the meter end. TT earth with an unprotected 2.5mm cable coming out of the wall and disappearing under ground, no idea where the rod itself is. No label on the incomer fuse.
Charging point is to go outside the wall the meter is fixed to. The CU position would mean an extra charge for a long run.
Also want to have fitted a 16A socket for the motor home.
Rather that cable back to the CU the sparks recommended a second 7 way Wylex NM CU next to the meter. Henley block in the tails to the Sub Main Switch.
The DNO (UK Power Networks) inform me the tails to the meter are too small (16mm2) for the 100A fuse that would be needed. They had been booked to come and check the earth and uprate the fuse (if required) but CV19 means only essential work being done. Doesn't a dodgy earth count as a safety issue?
Sparks was to fit a Wylex NML CU but doesn't a TT earth mean a metal CU needs a RCD? That plus the isolator means a 7 way CU is only good for three circuits.
I know it won't work independently of the incoming supply but doesn't Solar PV constitute a second voltage source? No warning on the sub main that one exists.
I'm trying to coordinate EV charger, DNO attending and a Smart Meter install all together. I didn't hold up much hope but the Virus has made this even more unlikely