Strange anecdote here.
I have worked for electricains off and on for about 6 years in my post high schiool youth, but never apprenticed.
I was doing it because there were lots of hours to be worked over the summer breaks before during and just after uni, and the wages were pretty good too.
By the third year the boss figured I had brains and had me planning the next weeks work load of me and 5 others.
So years from that, in the house I own it was 2003.
This house had a really early Taylor 24 circuit 125A circuit breaker panel, but with 16 breakers installed.
No added breakers could be bought.
They had gone out of business by like 1975.
Existing AC was on its own disconnect tapped off of main panel lugs prior to me buying, to power the install of the central AC.
To do some upgrades, like central vac and a proper dedicated feed for a built in dishwasher and microwave, and fridge and freezer on their own circuits...
I took some old heavy wall copper drain pipe that was surplus from plumbing renos I did in the house.
Sawed and filed to size, pounded to flatten and work harden it, and tapped holes in the right places.
And made DIY busbars fingers so as to be able to bolt on Square D breakers to the old panel.
I knew an electrical inspector would flip if they ever saw this mod, so that only lasted for about 4 years.
Then I planned, and excecuted a panel change out and service upgrade.
To pull the old panel and place a 60 breaker 200amp Seimens panel.
Did the work myself on a day I took a holiday from the office job
I booked the ESA inspection in advance, and coordinated to do the meter pull with the utility.
The utility came the day after to put a new seal on the lock ring.
It was already a 200A capable service to the meter and meter, thank god.
The inspector said I did good work.
That it looked better than a lot of full time trades would have done.
Then he dinged me for not having the copper gas pipe drops bonded to earth ie grounded, a new rule that year I had not yet heard of. It kind of made sense.
So I did that minor work and call for resinspection.
Maybe another $100, dont recall the actual amount.
When he came back, he said all was good..
Admitted that back at the office when they say a home owner was doing such a big job, that the boss said they had to cite me for some little thing.
But that he said to me he told his mates that I had my act together on the big stuff.
So down the road if there is some misfortune and an insurance claim...
And they start making noise it was electrical related
I have the ESA inspection sticker and permit in hand to ram back at them .