KeepItSimpleStupid
- Joined Mar 4, 2014
- 5,088
3 phase protection is more common. We lost a phase in a storm and most of the stuff survived, but a few things did not and those things were very expensive to repair. So, 3 phase protection was added. That included mismatched voltages, phase reversal, missing phase, and timed loss and timed re-start. One event in 25 years or so. I don't think we had phase reversal. I think it was like 5 devices total. It wasn't cost effective to do it to ventilation and 36 heat pumps.Armed with this understanding it should be very easy to decide just how you want to test a circuit. But for the life of me I can't imagine why anyone would need an automatic detector circuit to be active on the line at all times. When the wiring is installed THAT is when it's tested to make sure it's done right. What's going to change after that? Unless someone physically alters the wiring (or works on the line) nothing should change. And if someone DOES work on it - testing to verify the wiring was done correctly should be performed BEFORE restoring power to the equipment. But if you want an automatic system to monitor it - that's your prerogative.