On Fri, 22 Nov 2013 22:47:56 +0100, nestork wrote:

All of the neutral wires connect
to the neutral buss in the main panel, and that neutral buss gets
connected to ground, whether it be a plumbing pipe or a ground rod
pounded into the ground outside your house.

This "ground stake" is right below the panel, driven into the ground:
http://farm6.staticflickr.com/5490/1...d624356b_o.gif