On Wednesday, May 28, 2014 9:27:32 AM UTC-4, wrote:
When are you going to use an actual light bulb to test the circuit at the utput of the breaker. Non-contact sensors can be fooled, and if there is an open in the ground side, almost anything can indicatevoltage, except an actual circuit load like a light bulb. It is beginning to appear that you are the dim bulb because you won't do the definitive test at the breaker output.

He did say he swapped the breaker with a working one and
also replaced it with a new breaker, both of which would rule
out the breaker as the problem.