I have no problem with a 'spec' .... and I have a confession to make:
I almost always use the 'quick reply' box. This seems to specifically address my comments to the previous poster ... when that is not always my intent.
In this case, two posters mentioned #6; I thank both of you for responding, and I understand both approaches.
For general discussion purposes, if the intent is to cause a breaker to trip should someone get a shock off the siding, I'm not sure I'd approach the matter the same way. I don't think there's anything in the code that would require a wire larger than #14, I don't think you need to use lugs, and I would want the wire to land on the bussbar in the panel. That's how it looks to me, anyway. I don't see the metal siding as being part of the grounding electrode system at all.
