Discuss Correct grounding of metal junction box w/splices for 3 circuits in the Electrical Forum area at ElectriciansForums.net

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Open a neutral under load, and it will float up to 120 volts.

Yes, normally that would happen on the load side of the break.
However the proposed situation of joining three neutrals together would prevent the voltage rise from occurring, but it would overload the other two neutrals.
 
Yes, normally that would happen on the load side of the break.
However the proposed situation of joining three neutrals together would prevent the voltage rise from occurring, but it would overload the other two neutrals.

Yup, that is unless someone shut down the microwave circuit un-doing the wire nuts thinking they are all dead. This is why the NEC requires any branch circuit sharing a neutral be equipped with listed handle ties or a multi pole breaker.
 

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