What is the wild leg in a delta power supply?

In a delta power supply, the wild leg refers to one of the phases that exhibits a higher voltage than the standard phase-to-neutral voltage. This typically occurs in a three-phase delta configuration where there are no neutral connections. In this setup, one of the phases, often referred to as the "wild leg," will have a phase-to-ground voltage that is not equal to the other two phases.

This leg usually measures higher than the typical 120V found in many systems, particularly in commercial and industrial environments where three-phase power is utilized. The voltage on the wild leg can often be around 208V in systems designed for commercial use, making it essential for certain equipment needing this specific voltage to function correctly.

Understanding the characteristics of the wild leg is crucial for anyone working with delta configurations because it impacts how equipment is connected and the voltages supplied to various devices. This makes option B the correct choice as it accurately describes the wild leg in the context of a delta power supply configuration.