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If the cables are in safe zones and they are protected by an RCD then all is well generally. If you did need mechanical protection, that means industrial conduit, not diy stuff. Basically something you wouldn't be able to drive a nail through.

Harsh.

Works for me.

This pump comes with a flex and a plug. Is BS7671 even relevant? Much like they don't apply to my missus' food mixer, which has a motor bigger than 0.37kW.

Do they? Says who?

In lockdown? That's crazy talk.

? If we are talking about BS7671, then they are regulations, not recommendations, not laws. Compliance with BS7671 is evidence of compliance with the applicable statute law, PUWER, EAWR and the like.

Legal? There are no laws defining or requiring any of the above.

And the point of all this was what? An actual installation in your house? Or purely hypothetical?

Is it running slow without any load? Does it drive through a gearbox? Is any gearbox and bearings in working condition? If you've swapped the motor and it's still running slow, then as above, what's supplying it? Phase converter, VSD? VSD will have lost its settings after 5 years off.

I'm assuming you mean that my guesses are rarely wrong, rather than, for once, an OP has returned....:)

I'm guessing the OP has long gone.....

MCP?

Presumably you mean field wiring and not panel wiring?

OP - Make sure you prove that the pull cord connections are dead if you just pull the lighting fuses. Dont just assume that the circuits are dead just because you have pulled the labelled fuses, who knows what has been wired to what.

As do I.

CEGB standard is for all numbering to read away from the terminal, regardless of what that does to orientation, or your neck. That's an old standard of course.

Caution. You have just entered a minefield.

50 complete cycles per second, passing through zero 100 times per second

Hardly a typical example though. Generally I would expect to see back to back lugs for different wire sizes.