Pv array earthing why?

[Sparkytlec]

As I understand it bonding the frame has nothing to do with the transformer. the transformer gives electrical seperation of the DC and AC. we are treating the frame as an extraneous conductive part and I would always be inclined to earth the frame, regardless of what transformer is used.

It has every thing to do with a transformer if the frame becomes live with a transfomer then it stops current flow from reaching earth of the AC system. If someone touched it then the current woud not compleat any circuit so no nead to earth. If you earth with a TT or TN-S system then you must earth to the MET as using a spike could have a differant potential to the MET and if you have PME then you must use a spike as the earth on PME is a combined nutral earth that would make it more dangrous if someone on a ladder were to touch the live array as the earth point on PME is back at the DNO transfomer.

 

[SolarCity]

Edit: Ignore me - I just woke up and I misread your post

 

[Rw1001]

All mcs approved panels are class 2 double insulated. The dc cabling is also double insulated. For this reason I wouldn't earth the mounting system any more than I would earth metal guttering or tv aerial bracketry.

 

[powervan]

best answer for u is dump the TL go for sunnyboy 3800 of HF and screw up the velux

 

[powervan]

Oooops ment or hf

 

[Dan]

Don't mind me while I bump some threads in the solar PV forum. If they're not current or applicable topics, just ignore the threads; they'll drop off the page. If they are, feel free to chip in and chat solar stuff in the solar panels forum.