Quote Originally Posted by Frank S View Post
What you are seeing is only the 3rd step in making a wired connection 1st step strip the wires 2nd step make a tight mechanical twist 3rd step dip in tin 4th step secure connection with either a bolt type insulated connection or in this country a spring-loaded plastic wire nut 5th step dip in liquid insulation use heat shrink or moisture resistant tape to seal out air and moisture lastly also since it is not in the USA plaster the grove in the cement wall and cover the connection area with a removable inspection cover
Yep, you're right. Just checked my copy of NFPA 70 (2017) NEC:

300.15 Boxes, Conduit Bodies, or Fittings - Where Required. (A) Wiring Methods with Interior Access

Definitely NOT in the USA...