On 02/08/2011 03:20 PM, Nico Coesel wrote:
Jim
wrote:

Two lines coming in...

How much risk is it to assume that both "Tips" are essentially earth
ground potential?

You can't assume either is at ground potential.


Right, they are at frame ground potential at the central office! And,
there is no reason to be sure the two lines are from the SAME CO! Ours
are not. One is from the real CO, the other is from an RT a couple
blocks away.

Jon