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Easy way to remember. N comes before V. C comes before S. LicenCe is the Noun, LicenSe is the Verb.

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Don't pay him then - he hasn't done the job he was contracted to do.

Historically NICEIC required full registered contractor status to do I&T - Domestic Installer wasn't enough.

From the relevant regulations: “qualified person” means a person competent to undertake the inspection and testing required under regulation 3(1) and any further investigative or remedial work in accordance with the electrical safety standards; No identification of required qualifications or...

Sloppy work there. Me, I mean. Pretty sure (but didn't check and didn't clarify) the NEC requirement isn't "never", it applies to "constant" loads. Which I assume must mean "for more than X minutes/hours/whatever". My point was that different countries have different rules, and what they...

True

Any box sturdy and spacious enough to put a gland into. https://www.screwfix.com/p/tower-rubber-exterior-swa-20-gland-2-pack/56505 Some boxes e.g. Wiska have gland plates which make it easier.

Ah - the old absence of evidence Ξ evidence of absence conflation

Yup. Even if they use the right wire (can't find a standard for that - presumably it's in BS 3036) they might not tighten the screws enough. Or too much and neck the wire. Or they might put bends in it.

That's what I meant :whistle:

So about .025s at 1kA.

And the NEC says that breakers should not be loaded to more than 80% of their rating.

RCD trip out to help out?

One can apply the Mk.1 eyeball curve extrapolator. Might work better on a piece of paper without the fuse rating legend, but on a screen one can get some kind of idea.

Or a non-mix of makes but installed in a tin box made by someone else and internal tri-rated cables sourced from a 3rd maker.

https://www.beama.org.uk/static/uploaded/992ea5f3-2044-46b2-9db965480b99d7c8.pdf

If you don't like 'em don't have 'em.

Well they could, but even though I am in favour of higher taxes and greater "social" spending, I'm not sure I'd be keen on what would basically be a "circuit tax" of £130 per circuit. Would old Wylex standards attract an even higher rate, as all the cost of RCBOs would be avoided? :D