The Code has assigned the color ___ to the high-leg of a 4-wire delta-connected secondary.

The Code has assigned the color ___ to the high-leg of a 4-wire delta-connected secondary.

• A. red with green tracer
• B. black
• C. pink
• D. orange

Answer: (D)

In a 4-wire delta-connected secondary, one winding is center-tapped to create a high-leg delta, and the conductor on the high leg must be colored orange. This orange marking makes the high leg immediately identifiable because its voltage to neutral is about 208 V, while the other two legs to neutral are 120 V. Marking the high leg orange helps prevent accidentally using it for 120 V circuits or mis-wiring panels, enhancing safety. The neutral stays white, and the other two hot legs are the standard hot colors.

In a 4-wire delta-connected secondary, one winding is center-tapped to create a high-leg delta, and the conductor on the high leg must be colored orange. This orange marking makes the high leg immediately identifiable because its voltage to neutral is about 208 V, while the other two legs to neutral are 120 V. Marking the high leg orange helps prevent accidentally using it for 120 V circuits or mis-wiring panels, enhancing safety. The neutral stays white, and the other two hot legs are the standard hot colors.