Hi Guys,
At work, we have had 8 car chargers installed by contractors - they've been and gone, but I was wondering about the earthing of them. (I'm not involved in contractors, so cannot ask them).
What they have done is:
MCB - RCD - Isolator - ran the cables outside on cable tray - then burried the cable under ground - then up through the stand, in to the charger.
- SWA is earthed/made off both ends, and the earth cable has been used.
- First charger is approx 2m from the building, the 8th approx 16m away from the building.
Is this a case of you can take the earth (from the DB), or are you supposed to use an earth spike at each charger? The charging stands are metal, and don't seem to be earthed with a wire, but then again, they are buried in to the earth, approx 2ft deep. Do these need bonding with the earth from the SWA?
I've never understood about exporting earths, hence the question.
Thanks
At work, we have had 8 car chargers installed by contractors - they've been and gone, but I was wondering about the earthing of them. (I'm not involved in contractors, so cannot ask them).
What they have done is:
MCB - RCD - Isolator - ran the cables outside on cable tray - then burried the cable under ground - then up through the stand, in to the charger.
- SWA is earthed/made off both ends, and the earth cable has been used.
- First charger is approx 2m from the building, the 8th approx 16m away from the building.
Is this a case of you can take the earth (from the DB), or are you supposed to use an earth spike at each charger? The charging stands are metal, and don't seem to be earthed with a wire, but then again, they are buried in to the earth, approx 2ft deep. Do these need bonding with the earth from the SWA?
I've never understood about exporting earths, hence the question.
Thanks