[Peter Wieck[_2_]]

Electricity in a wire, AC or DC, moves much faster than the "speed of light" - which is defined by its speed in a vacuum. Pop an electron into the system at one end, and that instant, one pops out at the other. The water that one puts in a pipe is not the same water that comes out the other end (unless the pipe was empty initially - not possible with electrons in a wire). With AC current, it is entirely possible that no individual electron makes it down the entire length of the wire.

Peter Wieck
Melrose Park, PA