- Reaction score
- 3,010
Your quite right, it's time to get CSI on it.It is often possible to identify the root cause from close forensic examination of the damage. Is there any way you can get and post high res pics and / or get a sample open on the bench and take some measurements?
Terminal burnout is not normally caused by a supply fault like a floating neutral. It is more likely to be from incorrect installation or faulty units. Overvoltage will usually kill the internal DC supply dropper and one can often tell from which components failed in which way, whether it was a 'surge' or a long low overvoltage from a floating neutral.
The fact these faults have occurred across most floors leads me to lean towards a supply issue or early distribution issue.
I'll try to get back there today and swap out a couple, get some better pictures and do an autopsy.