Using a white #12 wire marked as a hot for 220 applications

[Jhon123]

Im being told I cannot phase a white wire (12/2 romex) going to ac disconnect with no neutral required but i understand that as long as is cable,permanently marked with like phase marker we should be good ? 200.7

 

[infinity]

Yes you can re-identify a white conductor within a cable as an ungrounded conductor. This is done everyday with 240 volt circuits.

Welcome to the Forum.

 

[roger]

Im being told I cannot phase a white wire (12/2 romex) going to ac disconnect with no neutral required but i understand that as long as is cable,permanently marked with like phase marker we should be good ? 200.7

You should be careful about taking advice from whoever told you that.
As Infinity said, the correct term would be re-identify.

 

[Jhon123]

Thanks

 

[tom baker]

Questioning is a valuable trait, or show me the code section