#30 amp hooked to house 110
My theory is that the licensed electrician or plumber, for that matter, has 'done it the same way' forever.
At some point, they stop thinking, and their hands move almost automatically.
Anytime you require them to think, you either get 'we don't do it that way' or they just do whatever they routinely do. Not that they are bad people, but they are creatures of habit.
My experience as an engineer has tended to be working on new stuff all the time, so you have to think first, then act.
Of course, along with that, you will never hear me say the 'last words of the Southern Bubba', "Hey, y'all hold my beer and watch this!"
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'The Silver HamShack' (2007 International 22FB CCD 75th Aniversary model)
Multiple Yaesu Radios inside and many antennae sprouting from roof, ProPride hitch
2012 shortbed crewcab 4x4 Toyota Taco TV with more antennae on it