TL inverter & array frame bonding..confusing at best!

[moggy1968]

it is an odd thing I would agree, we rrecently did a board change in a static caravan and the council asked us to TT it. previously it was using the Earth from the main supply to the park.
before inserting spike, Ze,about 0.2, after inserting spike, about 76, so by complying with the regs we made his earthning worse.
In my view the ideal would be PME with an additional spike outside the zone but you can't have 2 earths.

 

[bumcrack]

Moggy...

I think I have answered my own questions to you. If PME is at the inverter ( but isolated from ground ) and the array is at ground, there is the potential for a potential, between inverter metalwork and PV frame...!

cheers..

 

[moggy1968]

It is simple as, except it isn't!! for my first part P inspection I rewired my garage, which was detached and about 5 meteres from the property. Prior to the inspection I rang ELECSAs tech support and asked if I had to spike it and they said as long as it's not too far away it would be ok to transport the earth. I asked how far away not far away was and they wouldn't give me an answer. Me and the inspector had a lengthy chat about it afterwards but still non the wiser, oh, and I transported the earth and he was fine with it.

 

[GreggElectrical]

and yet it get discussed on every electrical board every week of every month.....

Any when you tell your suppliers you dont need three core to supply that garage e.t.c they look at you funny. Most round here don't even stock 2 core.