If all that metalwork is nicely bonded, I'd be happy treating it as "indoors" (see also 717.411.4 (ii) for a similar situation addressing the same problem) - really it's the extent of what we used to call the main equipotential zone that's the consideration, rather than exposure to the weather per se.

Use an open-pen detection device (often built into charge points these days) if you want some additional reassurance.

       - Andy.

Mark,

It may not be your responsibility, but I would hope that the Architect building desiner and the person responsible for the fire risk assessmnet has looked at the RC59 publication as it has a number of points regarding location/design/operation of EVSE, so for example it states that:

There are far more items to consider, but as I say may not be under your design remit, but if you are responsible for the electrical installation design only, you may wish to clarify with others that they intended location is ok and been checked by others.

I believe RC59 is not a code of practice, but fire risk assessors and main insurance companies will likley refer to it.

Cheers GTB

Hi GTB,

Yes, we always advise the clients regarding this publication and that they must have a fire risk assessment carried out by a trained and competent person to highlight any additional works required with regards to fire alarm, fire suppression, smoke extract etc. 

We have already had a number of installations not progress on the back of the fire assessment carried out on our advice as the works involved with improvements recommended would have cost too much and the clients didn't want to go ahead with it.

Until it becomes a code of practice or BS, then unfortunately a number our competitors wont even mention it and just plough ahead, but we feel its the correct way forward.

Regards Mark

Electrically speaking, there is a far greater shock hazard from having the metal steels and the car body not connected, as the chance of a solid contact to both is very credible.  The outdoor thing is a red herring, as only users with limbs like Mr Tickle will be able to make good contact to ta parked  car and the earth outside without touching the steel. Earth to the steel and do not split the earthing. Do however verify how the building steel is earthed - I suspect it will make a pretty decent electrode - far better than anything you could hammer in without major works and a digger, unless for some reason the joints are insulating - so that should just be checked.

Mike.

Mark,

Thanks for confirming and totally agree with you, many EVSE installers are just doing what the client wants without mentioning fire risk needs looked at. So good to read the approach you take, even if it means potential work does not go ahead.

Regards GTB