In fact I'd say the average workmanship standards in all trades has nosedived over the last 20 years or so.
I despise this sweeping type of comment. I mean I served my time well within your "good days range" eg much more than 20 years ago.
But - The type of post and statements such as not as skilled/competent/up to standard as they used to be ? Does that mean that all of us who passed our apprenticeships in the 70's and onwards are ---- teachers ? Or are we all of a sudden bringing up our kids to be stupid ?
It's not a zero sum game this point im making, If all the kids coming through trades are not up to standard then who the hell is teaching them ? Who is bringing them up ? Who is making them entitled ?
Might be bigging myself up a tad but thinking back I have had maybe 10 apprentices that I taught from start to finish all of them passed their respective trade tests and completed full apprenticeships ? Does that mean im some sort of god tradesman who can impart knowledge onto pimply teenagers where the rest of the country according to some/many cant ? I don't think it does to be honest.
Too many tradesmen give it "kids these days" "I haven't got the time too...." not like the sparks who taught me who obviously had all the time in the world to get the job done while taking the time to show us how and why.
As for the thread itself ? Obviously testing and inspection is rocket science and not one person would be able to spot the issues with the pictured socket or the poor resistance in the other example listed....OR it could actually just be basic stuff ?
@OP If you do a decent apprenticeship with someone who has at least half an intention of teaching you and on top of that you pass your 2391 and/or whatever other requirement is in place that particular year then you can test and inspect to a reasonable quality.
If you are new you will be slower, but if you are on a fixed price then nobody dies, nobody loses anything. As with anything in life the more you do it the more experience you pick up. Good luck charging much extra for that experience from your typical customer who wants and EICR, Although if you work for a company you might just earn yourself an extra 10p per hour.