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I don't see how installing a ring circuit with a '20A-rated' connector is fundamentally different from installing a ring circuit where part of the cable is installed with a more restrictive installion method than the rest such that the CCC of that particular section is only 20A.

In the video he essentially states two things. One of which he backs up with a reference and one of which he doesn't. He states that according BS7671 the cable for a ring should be rated at at-least 20A and gives a reference to back it up. He then goes on to state that the same rule should be...

Two independent faults in two different circuits within a second of each other would indeed be extremely unlikely. The harder question is how plausible is it for there to be two "live-cpc" faults on different circuits with a "common cause". I would think the only remotely plausible situations...

Harmonised colours for fixed wiring in the UK were introduced in 2004, with a two year transition period, so red/black was considered "acceptable"* until 2006. Of course what was acceptable and what was actually available can be different things. I presume the suppliers wanted to phase out...

Lots of things are sold that could be unsafe if misused. There will always be a compromise between protecting idiots from themselves, and not preventing the sale of useful products. Afaict the requirements for fusing in BS1363 have remained largely unchanged for a very long time (possibly since...

Well I just bought some rapid fix sockets and my conclusion is that for small fine-stranded conductors (I tried some 0.75mm mains flex and some 0.4mm test lead wire which I had handy) the wago style terminals are far far better than the massive screw terminals on regular sockets.

In rural areas it's not uncommon to see 11kV overhead lines with only two wires, so they can't feed a 3-phase transformer. Whether the transformer outputs are split-phase or single ended I don't know, I suspect it varies with the power capacity.

I did some searching and it seems that omicron advertise their "compano 100" for MCB testing, but it only has an output current of 110A, so seems only suitable for B20 and smaller MCBs.

In general, a 3 phase cable will be cheaper than a single phase cable of the same power capacity Also domestic/small commercial intake and metering and distribution gear tends to be rated at a max of 125A, and often less. If you need more than that you are getting into the world of CT metering...

https://electrical.theiet.org/wiring-matters/years/2019/75-may-2019/mythbusters-4-double-insulated-cables/

If the values and calculators I've found online are correct then it looks like a 2.5 CPC would be good for an 80A BS88 but not a 100A BS88.

I feel the need to start from the beginning here. You should not design installations you expect to be overloaded. However, unanticipated usage of the installation, simple bad luck with timing, or faulty equipment can lead to overloading. The possibility of overloading cannot be completely...

There are certainly cases where one can see that an item exists, either with the MK1 eyeball or with the help of tools like mirrors or endoscope cameras but where to access it for inspection or maintenance would require destructive actions.

The ones I've seen like that had their own base, rather than a conventional battern holder.

Stuff in bathroom zones 1 and 2 needs to be at least IPx4 rated. The bathroom ceiling is usually outside the zones (the zones end 2.25m from the floor) but I'd expect in most cases a pendant would hang down into them. Afaict battern holders with the traditional choice for bathrooms. Even...

My thoughts on this. 1. The "random example" you found seems to be substantially more efficient than the house-brand bulbs I've looked at. 2. Not all lights were incandescent even in the pre-LED era. It was common to see flourescent battens in kitchens etc and the LED counterparts to those are...

If the property has a timber ground floors then ground floor socket wiring is usually run under the floor and up to the sockets, but if the ground floor is concrete then wiring for the ground floor sockets is often run under the upstairs floor and down to the sockets. I agree with others who...

Two potential concerns spring to mind. 1. Electrical conductivity. An electrical enclosure should ideally be made out of either a good conductor and connected to earth or made out of a good insulator. A material that is neither a good conductor or a good insulator poses a risk in that it may...

Hmm, I'd expect most manufacturers to use much the same internals, regardless of whether they were making a white plastic product or a fancy metal one.

One of the quickwire junction boxes would be a safe, easy and relatively small soloution.