On August 29, 2019 at 20:40, Don Heany said...
What does the VOM register on the Ring terminals? That would be my first test.
Always the first thing to do is check for voltage across any terminals that can be connected to external stuff.
In the following, "terminal" can mean "chassis" or "case."
This list is not just for Ring... it's for every unknown situation.
1st check for AC voltage, each terminal to ground -- save your life
2nd check for DC voltage, each terminal to ground -- save your life
3rd check for AC voltage, terminal to terminal -- save your life and your meter
4th check for DC voltage, terminal to terminal -- save your life and your meter
Know your meter. Some meters show a voltage present when the other type (i.e. DC versus AC) is present. Test your meter in advance so you'll know when this happens.
5th check for resistance to ground from each terminal
6th check for resistance from terminal to terminal