AC Power Question

@ lowrider [quote] Both lines on the same leg with equal distribution of current draw from devices and appliances [/quote]
Same leg means same phase and you just caused an imbalance at the main panel. In some cases thats minimal but rule of thumb is to keep the panel balanced.
I believe it was jea who is code savvy, been a lil whiles.

@ sleepwalker...huh? Now that sounds like noise. Just trying to point out a few things, take it or leave it. You get time, ask jea, doubt I’m wrong but ya just never know. Have a good evenin :)

@ jea...hmph, imagine that, interesting. Residential wiring, something I left to the romex guys, my forte was industrial environments. I learn something everyday. Rest assured, big difference; grounding grids, isolated grounding, and transformer makeup providing the power. Clean power, dirty power, who knows what other kinds of power has been deemed since I left...*chuckles

There is a member in here that knows the NEC like the back of his hand, maybe he’ll chime in. I’m a retired electrician and the the NEC code book has been revised quite a few time since I left the field. I will tell you this, different phases for those isolated circuits, and if you want to take it to another level think isolation transformers.

@lowrider ...I agree with you, he's a good source to have around. Haven't had time to thoroughly read some of what he posted and linked to last night, but I will.

Two circuits on the same phase require their own neutral. In other words a 12/3 romex termination at the panel needs different phases, code changed where now the breakers for those circuits need a mechanical tie to shut them off simultaneously, or a dpdt breaker. Older homes will not have this feature, before the code was revised a single breaker was acceptable for each 110V phase as long and the romex run was of different phases. Too lengthy to get into.
Anyways, Jea brought code revisions in regards to the breakers to my attention months back, quite a few code revisions since I left the field.
With that said, the two circuits of same phases sharing the same neutral is one of those ’shall not’ do and has been code for as long as I remember. It's pretty much common sense.

Imagine the old electrical tube and knob bungalows. Technology sure has taken us to another level.