Re: Just when you thought you saw the worst....
That looks like #6 (at best) between the breaker and the tails. Is that big enough for 100A?
I'm thinking that breaker should be closer to a 60A one for that size?
In the old days I used to always carry a tie-in kit and I had a bunch of breakers, knock-out plugs and cable hole-clamps, I would at least try to get questionable shit hidden inside a closed panel when done. I would also band together 3 #8 lines into lug holes in the neutral bar instead of splicing it like they did. (I wanted the panel looking untouched when I left -other than the occasional new shiny knock-out hole plug)
I also left a trail of properly installed 60A range plugs at many of my regular venues (-although I've heard somewhere that a range plug not in a place where there's an actual range isn't code either.)
Upon further inspection, no, you can't really tap into the neutral like that, especially without de-energizing the whole panel.
You cannot parallel conductors until a threshold size is reached, but I don't have the code near me. The wire has to be BIG before you can parallel conductors, in the MCM range.
Range plugs are NOT 60A, they are NEMA 14-50 or NEMA 10-50 receptacles, the 14 having a neutral and ground, the 10 only having a neutral. A NEMA 6-50 is commonly used as a welding plug and offers no neutral, so cannot be used to acquire 120V.
I do have some NEMA 14-60 plugs, they are massive and really expensive, and look totally different than a range plug.
Maybe that is #6, the breaker could be rated less, or it could be in use against code.
The only proper way to tie into that neutral to get the kind of power they are probably using is with a very fancy thing that I own but can't remember the name of. It has jaws that go around the wire and clamp down, kind of like a super huge tap connector. Yes, it's legal.
