First of all if this guy is doing these installations by hand and don't have a pump hoist for pulling/installing pumps, he is probably a weekend warrior. I would change pump companies.
Well drillers and pump installers all install pumps slightly differently. (We all have our way of doing things) But, it still has to be done right. Torque arrestors to me are a joke, so is safety rope. All this stuff was made for DIYers. Black PVC electrical tape will last ten times longer than any pump motor I have ever seen. If the wire is pulled tight and taped every 21 feet on galvanized or every 10 on plastic pipe, no chafing will occur.
I would say bye bye to these guys.
Calling Sta-Rite (Pentair who owns half of the pump companies in the US) will get you nothing but DIY advice since they are so happy to sell to the big box stores anyway.