Use of bare copper conductors for grounding PV modules

[jaggedben]

I think T.M. is worrying about nothing.

Certainly the worrying has little to do with the topic of this thread. Although perhaps it is worthing stating what is hopefully obvious to everyone here: That contact between bare copper conductors and aluminum racking should be kept to a minimum, and that dual rated (CuAl) lugs must be used, and with appropriate isolating hardware (i.e. stainless steel star washers) where tinned copper lay-in lugs are used on aluminum racking.

These worries are another argument in favor of using an insulated conductor as an array EGC, albiet a minor one.