NON COMPLIANT NEW EV INSTALLATIONS

weirdbeard:

Harry Macdonald:


And if vacuum cleaners, electric strimmers, lawnmowers, and the like can be class 2, why can't EV chargers be as well and the problem would go away.

Hi Harry, well said, I have often wondered that myself ?

Its not just the charger itself you need to consider as the "Final" piece of equipment, you also need to consider the vehicle itself.

If the vehicle was 100% electric, then in theory not an issue, but with hybrid vehicles where there is a liquid or gaseous hydrocarbon traditional fuel as well as a electric battery for propulsion then there must be an earth thru the EV charger and metalwork/body of the car itself, hence as some people have already mentioned loss of the PEN conductor would be a safety issue for those in contact with vehicle body and ground they are standing on or other earthed metalwork.

 

UKPN:

My company connect a greater part of the 4000 installations every month of the DNOs, working to their strategy which has evolved over many years. 

Regards, UKPN

Around here the DNO do not connect any new installations, they run the supply in, then metering services install the meter and an isolator.


It is then the responsibility of the customer’s electricians to connect the new installation to the isolator and if the electrician also connects the consumer’s installation to an earth terminal installed by the DNO the electrician has to take responsibility for testing it and ensuring it will provide an appropriate means of earthing for the consumers installation.


The DNO and metering services assume no responsibility for connecting new installations to the network and definitely do not assume any responsibility for ensuring that the means of earthing is okay.


 Andy Betteridge 

GTB:

weirdbeard:

Harry Macdonald:


And if vacuum cleaners, electric strimmers, lawnmowers, and the like can be class 2, why can't EV chargers be as well and the problem would go away.

Hi Harry, well said, I have often wondered that myself ?

Its not just the charger itself you need to consider as the "Final" piece of equipment, you also need to consider the vehicle itself.

If the vehicle was 100% electric, then in theory not an issue, but with hybrid vehicles where there is a liquid or gaseous hydrocarbon traditional fuel as well as a electric battery 

Thanks for the reply, would you mind explaining why it is not an issue for “100% electric cars” but is an issue for plug-in hybrids? 


 

weirdbeard:

GTB:

weirdbeard:

Harry Macdonald:


And if vacuum cleaners, electric strimmers, lawnmowers, and the like can be class 2, why can't EV chargers be as well and the problem would go away.

Hi Harry, well said, I have often wondered that myself ?

Its not just the charger itself you need to consider as the "Final" piece of equipment, you also need to consider the vehicle itself.

If the vehicle was 100% electric, then in theory not an issue, but with hybrid vehicles where there is a liquid or gaseous hydrocarbon traditional fuel as well as a electric battery 

Thanks for the reply, would you mind explaining why it is not an issue for “100% electric cars” but is an issue for plug-in hybrids? 


 

I think you will find its to do with the rather flammable fuel that hybrids carry and how vehicles are constructed and how static is dealt with and of course the EV charger may not know what exact type of EV vehicle its charging. As I said in theory a true 100% EV vehicle could be equivalent of class 2, but thats not possible where flammable liquid fuel is used so hybrid cars must be earthed.

GTB:

weirdbeard:

GTB:

weirdbeard:

Harry Macdonald:


And if vacuum cleaners, electric strimmers, lawnmowers, and the like can be class 2, why can't EV chargers be as well and the problem would go away.

Hi Harry, well said, I have often wondered that myself ?

Its not just the charger itself you need to consider as the "Final" piece of equipment, you also need to consider the vehicle itself.

If the vehicle was 100% electric, then in theory not an issue, but with hybrid vehicles where there is a liquid or gaseous hydrocarbon traditional fuel as well as a electric battery 

Thanks for the reply, would you mind explaining why it is not an issue for “100% electric cars” but is an issue for plug-in hybrids? 


 

I think you will find its to do with the rather flammable fuel that hybrids carry and how vehicles are constructed and how static is dealt with and of course the EV charger may not know what exact type of EV vehicle its charging. As I said in theory a true 100% EV vehicle could be equivalent of class 2, but thats not possible where flammable liquid fuel is used so hybrid cars must be earthed.

Thanks again for the reply, but could you give any links to back up your info, thanks.

weirdbeard:

Thanks again for the reply, but could you give any links to back up your info, thanks.

Will static charge and common sense not do for now?

gkenyon:

weirdbeard:

Thanks again for the reply, but could you give any links to back up your info, thanks.

Will static charge and common sense not do for now?

Not unless you already add a drain wire when refuelling your conventional car, no !  I realise that when light aircraft bounce onto some airstrips on the edges of the desert a man rushes out to throw a dodgy looking bucket of what we hope is water over the tyres and than clips on his earth leads, before bringing up the fuel bowser, but the capacitance to earth of an aeroplane is much higher as are the chances of tribo-electrioc charging due to high speed.

I'd like to think the normal conductive rubber hoses and so on at the local forecourt that work for normal cars are good enough for refuelling hybrids too. When you are drivign along or just getting in and out, you do not earth the car - I suggest that the charge movement when connecting a non earthed charger is about the same as a bare hand.

mapj1:

Not unless you already add a drain wire when refuelling your conventional car, no !  .

Fuel delivery pumps with conductive polymer hose etc. achieve that, I understand ...