jar546
Forum Coordinator
True or False:
On a 240/120-volt, 3-phase, 4-wire center-tap grounded delta system, the high leg, which is commonly found in the 'B phase' and may carry a voltage of 208 volts nominal, must be marked in orange or another effective means of identification according to Section 110.15. Additionally, for 3-phase buses, the alternating-current phase arrangement must always be A, B, C from front to back, top to bottom, or left to right, as viewed from the front of the switchboard, switchgear, or panelboard, without any exceptions.
On a 240/120-volt, 3-phase, 4-wire center-tap grounded delta system, the high leg, which is commonly found in the 'B phase' and may carry a voltage of 208 volts nominal, must be marked in orange or another effective means of identification according to Section 110.15. Additionally, for 3-phase buses, the alternating-current phase arrangement must always be A, B, C from front to back, top to bottom, or left to right, as viewed from the front of the switchboard, switchgear, or panelboard, without any exceptions.