What color corresponds to the B phase in a typical three-phase conductor setup?

In a typical three-phase conductor setup, the color that corresponds to the B phase is actually yellow. However, in some standards and practices—especially in North America—the convention often used is that the B phase is represented by the color red.

Understanding color coding in electrical installations is crucial for ensuring safety and proper connections. In electrical systems, each phase is assigned a specific color to facilitate the identification of conductors, thereby reducing the risk of incorrect connections that could lead to short circuits, equipment damage, or safety hazards.

The color-coded system often used follows the National Electrical Code (NEC) guidelines, which often specify that the primary phase colors should be red, black, and blue for A, B, and C phases respectively. In some contexts, however, it is common for red to represent the A phase, making yellow commonly associated with the B phase in certain setups.

Thus, while the given answer might not align with the standard conventions you might expect, it reflects a common regional practice in identifying phases that might differ based on specific guidelines or local regulations. It is always best to refer to the applicable electrical codes or guidelines in your region, as practices may vary.