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A lot of power tools are deemed to have reinforced insulation but you are not likely to know the difference between double and reinforced as they use the same symbol of the two squares.

That doesn't make them Class II. Doesn't change the fact you can't use Class II as a means of protection in a dwelling and just because Class II parts may have been employed the normal rules for ADS apply.

They are not Class II.

Each conductor the live, neutral and earth need separate connectors so you need three of them not just one or it will just create a dead short.

I'm sure you don't many electricians are ignorant to this, see Regulation 412.1.2.

Installing plastic fittings in a dwelling due to the absence of cpcs does not rectify the situation as Class II protection should not be used in a dwelling.

As soon as you cut the armour the ends are no longer galvanised. Any moisture that comes into contact with this will create corrosion and this will creep up the armour.

It would have been tested up to the joint box.

Yes but this may already be in place at the consumer unit, can you show a pic?

Yes provided it has 30ma RCD protection.

Check connections are sound at the relay, these are thermal in operation so lose connections can cause issues. Check the FLC of the motor compares to the rating plate and the phases are pretty much balanced. Does the heat generated from this motor compare with the other two. Does it sound like...

Whatever it is who cares?

Didn't notice myself initially.

Looks like the remains of a wooden back box so maybe not as straightforward as originally thought especially if the switch is metal as there is almost certainly no cpcs.

The single red with the bare copper linking bar goes into Common. You then want a link across to the other Common using a piece of insulated wire, similar to what you have but don't reuse the bare wire. The other two go into each of the 1 WAY terminals so black in one and red the other in the...

Went to survey a large factory in Bath 20 odd years ago and in the upper stores they had PolyButyl Jute singles strung across the ceiling, what the Americans called knob and tube. I was told none of that is live but it was and powered most of the lighting all Class I with no cpc.

The wiring in my house was on the cusp of the metric change and mine is all metric, two doors up from me they are imperial they must have used old stock. Cables in both properties are fine at 50+ years so age isn't necessarily a defining factor.

What tolerance do you give for the low side of acceptable? This isn't something that needs Coding 3.6 meg ohm is fine.

So are you an electrician as it makes a difference to the responses?