I think across the spectrum of manufacturers this is perhaps the biggest weakness of most of them. It's hard to search through the recorded video. Even when you know where to look it's still hard to get there.
This indeed correct.
In the past 3 wire feeds have been acceptable but only if you install a new ground. Either rods or a plate. This eliminated that "parallel path" issue.
I have a 30 year old "conventional fan" air conditioner and the only reason I was able to purchase a new fan or under $300 was because we have a very good work relationship.
I went to a dryer that was wired like this. The customer complained that their appliance wasn't working right. I opened the plug and expected the worst. Once I corrected the wiring the dryer worked.
Sometimes you get lucky.
If you want to get "in" somewhere the best way is to know someone.
Small companies are a great place to learn.
The union shops have their place but it's not for everyone.
Mine open into the alley, of course I live in town and I didn't have any other choice. In a general sense we don't worry about crime. The doors get locked.
We all know that if they want in, they will get in.