Just because it is Monday morning, and a new work week is dawning here -- with the best spring weather available -- I'd like to stoke the fire a bit.
This is why one does use things invented the last 15 years, too. Because doing it the old and bad way would have been illegal and dangerous, and on top, tedious and time-consuming at best. This is under our patio. There's (EKK / EQX / NYM-J / Romex / Twin-and earth) fixed cables are fastened on the beam, and on the outside of said beam are small downlights fitted:
(borrowed pic)
The downlights could have had the installation cable into them, but that would have been pretty awkward and not very elegant, and required lots of swearing. Since I'm having a junction box anyway to branch off (there definitely is not room in the light for 2 cables) I opted for a piece of outdoor-grade rubber cable, with a strain-relief fitting, feeding the light, and then switching to "install" style cable in the box. The white cable is single-core; the rubber one is extra stranded. Joining those in a wire nut would have been tedious and certainly outside the envelope of permitted combinations for our wire nuts. Alternatively, a nylon-insulated barrier strip could have been used. That would, as I did inside the light, (where there is such a small insulated barrier strip for live and neutral, with ground on a screw in the body) have required ferrules and somehow finding a barrier strip that takes three wires.
Fortunately, we have Wago 221 series. Strip to 11mm, twist slightly if stranded, flip the lever open, insert cable, flick lever down. Done.
TE involvement: none. I watched a lot of CuriousMarc videos and browsed for function generators and RF signal generators a lot, though.