Are Shared Neutrals Allowed
If the Two Circuits Are from the Same Line, the Main Danger Is Overloading the Neutral with Too Much Current. a Fire Hazard as the Neutral Is Not Connected to...
If the two circuits are from the same line, the main danger is overloading the neutral with too much current. A fire hazard as the neutral is not connected to a breaker. In short, stay safe and run separate neutrals for each circuit. you definitely do not want to share neutrals from different circuits.
Multiwire branch circuits are allowed as stated in 210.4 under the conditions provided and can be considered as multiple circuits – even though they are not multiple circuits. … As you mention the neutral conductor is “shared” between multiple ungrounded conductors from different phases (or lines) of a circuit.
as long as the phase conductors are on different “phases” it’s fine. Recent code requires them to be on a double pole breaker though. I do it as much as possible in houses. It’s easier to pull one three wire for two circuits, than 2 separate two wires.