It is not code, but is it dangerous……
My buddy has a 240v 3-phase with a stinger line in his shop. A local electrician ran a multi wire branch circuit (round robin) for him so he could have three 120v outlets.
Only two (A and C) of the three hot lines coming into the panel will make 120v with neutral as the middle B line stinger in makes 210 w/neutral
This three hots sharing one neutral is fine when on the three different lines on a 208/120 3 phase, but in this case, he has two of the 20 amp breakers on the C phase. Does this create a dangerous overload situation for the neutral? I know it is not up to code, but I want to KNOW if it is going to create a dangerous situation to man or machinery.
I am already prompting him to get his situation evaluated by a pro electrician and it might mean transforming to another box at 208/120 and run his single phase circuits off of that.
I called the company that wired it and he said it is fine, no problem…. but I want a second opinion.
Thank you for your advice.
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