If electronic loads have been failing frequently, you can probably find the root cause at the distribution panel(s) supplying those loads.
First, trace the problems to their common point of supply — the last (electrically closest to the load) panel common to the affected equipment. You should look for:
- Power issues: Voltage, current, and harmonics.
- Physical issues: Connection integrity and bonding conformance.
In our next issue, we'll focus on power issues.