EV charging question

[richy3333]

No need to get worked up. And I don’t think accused you of anything. I was trying to highlight your original statement was not correct. In your defence you’ve now added lots of caveats to justify it.

apologies if I upset your sensitivity.

 

[craig.jones76]

Can some one expalin to me then if the PEN connection is lost supplier side how does not all the bonded conductive parts become live? Why such focus on the EV charger point?

 

[leebut]

Can some one expalin to me then if the PEN connection is lost supplier side how does not all the bonded conductive parts become live? Why such focus on the EV charger point?

The only reason for highlighting the EV issue on a PEN conductor loss, is the car charging is exterior to the property and is a 7Kw load that’s at full load for the duration of charging process

 

[Risteard]

Can some one expalin to me then if the PEN connection is lost supplier side how does not all the bonded conductive parts become live? Why such focus on the EV charger point?

The bonded parts would be within the equipotential zone though, so with adequate bonding hopefully the touch voltages won't rise too much and give rise to the risk of electric shock.

However outside a person charging an EV is likely to be in simultaneous contact with true Earth, and with the MET at a dangerous potential owing to the PEN fault.

 

[Midwest]

The other thing to consider, is a car is just sat there in such circumstances, with four feet bits of fat rubber.

 

[PEG]

The other thing to consider, is a car is just sat there in such circumstances, with four feet bits of fat rubber.

Speak for your own vehicle...my lithium-ion powered traction engine,has no rubber or plastic...

 

[UKPN]

Bill01803


The issue isn’t conversion of the clients property to a TT system, if there is any class 1 light outside fittings or bonded pipes to gas or water within 10 metres of the charging point you have the risk of dangerous touch voltages under earth fault (possibly from neighbours property etc) it’s part of the risk assessment you have to carry out prior to installation.

EV installation not straight forward external influences play a big part of installation, if you change the property from a PME to TT there’s always a risk of another electrician who doesn’t know the legislation on EV installation puts the PME connection back.

Also some ground conditions you would struggle to get the earth potential acceptable for the EV installation, hence why in the installation it’s easier and straight forward to install an isolating transformer.


Lee

I think you will find its 2 meters Lee, not 10.
Regards, UKPN

 

[Midwest]

I think you will find its 2 meters Lee, not 10.
Regards, UKPN

I thought was 10 for adjacent bonded pipes etc.