So based on my investigations/tests, it seems that the extra outside wire is a "sensor" that double checks to make sure that the circuit is grounded (the small board inside the plug labels it as such). If this wire goes "hot", it trips and cuts power until the issue is fixed. Additionally, if not connected it trips after being turned on for a moment. Seems one of my bricks must have come with the polarity of flipped or something, cause when I connect to the supposedly grounded wire to the sensor port, the transformer made a weird buzzing noise that sounded like the breaker was being flipped off and on rapidly; connecting to the "hot" inner wire (in reality the ground) fixed this issue (Additionally the LED does not light up in this unit, which could be related to the polarity being flipped). I've heard that these units have been known for sometimes shipping with the polarity flipped, guess I got one of those.
|
|
