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This rule has been in place for over two years and I can't find a single other person that has heard of it (including inspectors). Multi-volt motors have been showing up to 208 volt jobsites for a while now. Their nameplates no longer list 208 as an acceptable voltage. Does everybody else just tie equipment in regardless of what nominal voltage is present or what the nameplate states? The only reason I am aware of this relatively new rule is because calling the equipment manufacturer is common practice for me. When other electricians have a question, do they just push it to the back of their minds, throw the switch, and let it buck? I had to re-tap a transformer on the same job mentioned above. It was only 8% high and I figured that should be fine. However, I called the equipment manufacturer to verify and was surprised to find that their recommendation was to bring the increase to within 4%. This water cooled condenser would have worked if I just ignorantly powered it up and walked away. However, certain components were said to prematurely fail if I had left the voltage as it was.

I just see it on Facebook, presented as the right way to do things.
I am old enough to remember being taught those splicing methods but that was when they soldered them after making a solid mechanical connection.
I also saw it in this house but the wires were not soldered. The joints were twisted together tightly and a stinger was folded over against the splice before it was taped. I think I have all of those spliced removed now along with all of that old Romex. It was easy to spot. Brown plastic insulation, TW conductors that were tinned.
On the positive side, I saw no signs of heating on those splices. I should have saved a few pieces of that wire.

About the only thing on your list that gets tested is the GFCIs in residential. Most inspectors carry a bug eye tester with GFCI testing capability.
I had an Ecos tester that checked ground impedance.
Ground/earth testing is usually done by an engineering firm but I have only seen it on some state jobs. Toll booths were one. Out in the boonies, a toll plaza is the most attractive lightning target. The grounding system is right up there with radio towers, another interesting job.
Some commercial jobs do get megger testing but not residential..

Quite true Greg,
Back in the early days of me being a FF, we would get up on a single storey roof, at night, no fall harness or fall protection.
Start taking roofing iron off to get to the seat of the roof fire, yes it was dangerous (like most of fire-fighting is), but it was more about situational awareness, if you knew you could fall, you were more careful.
That is not an excuse for good retention in a fall harness/retention system, but once you have a BA set on and a fall harness over the top of that, it becomes quite messy with straps heading in all directions.
Everyone on a roof SHOULD have fall protection

Also, what is not mentioned here is the required trip time, this needs to be LESS than 300mS, which oddly enough is half the time required to send a person's heart into fibrillation.