Car chargers close to exposed steelwork

[goasis]

Hi, installing just cabling at this stage for electric vehicle chargers in a carpark under a building. Assuming tt earthing required on those. There is also exposed structural steel work rising out of ground which will be bonded back to MET.
I'm not designing this install, just installing and I'll admit to not knowing enough about car chargers at the moment.
Issues with two earthing systems in close proximity?

 

[Ian1981]

I’m still learning this subject. So if you do get a broken PEN, how will an earth rod, on its own, give you compliance with 722?

Whilst the earth will provide a path, so will a person touching the car, if in contact with true earth. Unless the earth rod has a low Ra, as per 722.

By making the earthing for the EV it’s ownTT island, How will a broken PEN cause an issue when your earthing for the EV is not connected to the PME earthing?

 

[Midwest]

By making the earthing for the EV it’s ownTT island, How will a broken PEN cause an issue when your earthing for the EV is not connected to the PME earthing?

Arrgh, reading your phrase to ‘supplement the existing earthing arrangement’.