Power line networking will work fine. I use this in my shop, and a buddy I recommended it to uses a DVR security system for his horse barn...all on a plugnet, or other such system.
digitaltrends dot com/computing/everything-you-need-to-know-about-powerline-networking
(I haven’t been a member...
It’s made for either 208 or 240 already. You’re calling it 220, which is likely just what most call 240 nowadays. 208 is from a three-phase system, typically commercial. 240 is typically residential, which is split-phase (single phase with a neutral).
The diagram indicates L1 and L2. In a...
A megger is a resistance tester that generates higher voltages to help find insulation breakdown, in this case, for a motor.
Basically...
It’s not a typical tool in most shops, but some older elmers might have one.