...but many are soldered.
I haven't seen soldered wires in vehicles for a lot of years, tip welded after the crimp possibly.
As I understand it (and I'm NOT conversant with the regs in this environment) the action of soldering wire in vehicles is quite well documented and may only be used if the chance of vibration/flexing has been fully mitigated by specific means such as encapsulation etc.
Yes I'm aware of the inclusion of soldering in 7671
It is not a good idea to put stranded wire that has been soldered into a screw terminal, The soft solder between the copper strands will deform under the pressure of the screw and thus the pressure on the wire in the terminal is reduced leading to a less than perfect connection.
But not very different to putting a stranded wire into a terminal with a screw pushing against the wire.
Really? I wouldn't call them electricians in that case. I got my first soldering iron at around 12 years old and have used it or its successors regularly ever since.
For once I have to agree with you but one has to remember that electricians these days may not actually get to handle electrical bits until after they pass their exams and by then they are qualified... Their scraps of paper prove it.
For passing my 11plus exam I was given a present of a reel to reel tape recorder, At that stage I'd been helping dad make audio cables for many years and soon made leads to couple it to the big ol' radio in the lounge, adapter leads for other kit we had. So again I can but agree.
During the first year at high school I purchased my first iron, more suited to DIN plugs etc than the thing dad had, By the 3rd year I was building all sorts of electronic things. my 14th birthday I asked for a better iron and currently have a selection.
However the average electrician never and I truly mean never has a requirement to solder anything.
When I got into panel building I took samples of some of my work to the interview (at age of late 30's I responded to an advert for an apprentice) to show some abilities, their first comment about the samples: 'we don't solder anything'. Apart from me designing an interface board for one of their regular projects that would have been true for the 14 months before redundancy. Apart from a very ocassional repair that has been true for me in the 20 years of electrical/control work since.
Did you ask him/her what reg prohibited it?
No I walked away and informed my employer I wasn't prepared to work under the inspections on that site and let him sort it out.