Running a 20A circuit on two parallel wires gauged 15A
I have a spare wire in the wall (not connected at the box either). I don't know if it's possible to use it as a load sharer to turn a 15A circuit into a 20A kitchen counter circuit accompanied with the appropriate new breaker (20A) in the box. Physically it would be two wires in parallel (each for a 15A load).
Thank you for any and all insight.