jwelectric
Senior Member
- Location
- North Carolina
110.15 High-Leg Marking.
On a 4-wire, delta-connected system where the midpoint of one phase winding is grounded, only the conductor or busbar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is orange in color or by other effective means. Such identification shall be placed at each point on the system where a connection is made if the grounded conductor is also present.
What if it is a 120/240 delta ststem is supplied from a 480 volt transforner installed in the same building?
Could the 480 system still have BOY color coding if it was a wye system?
On a 4-wire, delta-connected system where the midpoint of one phase winding is grounded, only the conductor or busbar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is orange in color or by other effective means. Such identification shall be placed at each point on the system where a connection is made if the grounded conductor is also present.
What if it is a 120/240 delta ststem is supplied from a 480 volt transforner installed in the same building?
Could the 480 system still have BOY color coding if it was a wye system?