Please don't slander or defame my PERFECTLY SAFE AND LEGAL WIRING SET-UP AND SPLICES..
And Bottom line is THEY ARE MINE....MY RESPONSIBILITY... MY PROPERTY....MY RIGHT..MY RISK.(Which is ZERO)
Your setup is NOT LEGAL per your own description.
BLATANT VIOLATION of the NEC, which most US jurisdictions have adopted as LAW (sometimes with additional restrictions) - and the very few areas that have not adopted the NEC have adopted an alternate standard that is very similar.
Putting a splice in a box DOES NOT make it code compliant - there's more to it than that.
It is very questionable about SAFE as well - still waiting to see where provision for strain relief is at, that IN AND OF ITSELF makes your setup unsafe AND a violation of Code.
It's not defamation when FACTS are being stated.
I'm not going to go into the "not covered wiring" issue, that's a point I personally think the Code is a bit excessively anal about - but it IS another violation.
Be happy the guy I learned to be an Electrician under has not seen your setup or heard your "instructor" say is OK - that instructor would be getting DECERTIFIED FOR INCOMPETANCE in no time flat.
Unless he WATCHED you making the splices, there is no way he has ANY CLUE if they are properly done or if they have any potential to be safe - and a LINEMAN should understand the need for stress relief better than I DO.
I never said anything about "high voltage" - and by LINEMAN standards I agree that a 220v setup is low power - but by the standards of connections where electrical tape gets used, it's HIGH power.
If you are in a building/home with a substantial space between it and other structures, then it might be justifiable to claim it's "your risk" - but if you are in space in a "shared" building/condo/townhouse/apartment/whatever or you are in a crowded area with only small spaces between structures, it is NOT just "your risk".