redewire
Member
- Location
- North Dakota
Where can I find the color coding of the nominal voltages in the NEC? Throughout my career on a 120/208 system it has always been A black B red
C blue, on a 277/480 it has been A brown B Orange and C is yellow.
Where does this originate from?
C blue, on a 277/480 it has been A brown B Orange and C is yellow.
Where does this originate from?