This was picked up a couple of weeks ago on one of our jobs. We were doing a walk-through of the system in line with the agreed scope and encountered this high-value “air gap resistor”. Luckily, the system hadn’t been energised and so no problems.
Looking at the cable layout, it seemed the locking pin hadn’t engaged; as things were neatened up at the next bend, we suspect the connectors twisted and separated.
This is the sort of thing we are looking for when we are inspecting systems installed by others, and it’s rewarding when we find them.
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