Ground - solid triangle or line triangle

[demonstar]

Right, I understand that a upturned rake symbol is a chassis ground, a triangle made of lines is an Earth ground as in a connection to Earth and a solid triangle is a signal ground. So where does this leave the ground we use in effects?

The way I see it is it probably is connected to earth through the amp so should it be a line type triangle symbol but I guess there is most likely significant resistance between the ground of a guitar and real earth. This would mean the guitar ground is at positive voltage relative to the real earth as theres some current in the ground as we use it as a negative return so does that mean it can't really be a line triangle earth. The effects could be a signal ground because we reference signals and could claim it's floating as it's above ground as there's current in the ground. Then again the ground often connects to the chassis so is it a chassis ground or should it be all three?

I may be over thinking this but I'd like to understand properly. The term ground seems to be used very generically and often used to replace the return line for a power source (battery etc.) so I guess that's be a signal ground. There also seems to be a obsession with calling it positive ground and negative ground as mentioned by some previous posts here I can't see why it isn't just ground making it positive supply for 'negative ground' and negative supply for 'posistive ground'. After all the ground is the reference not the supply.

I hope I'm making some sense. I couldn't think how to word this one logically.

Thanks.

[StephenGiles]

As nothing is standard, I should think it is whatever you want it to be.