In a 4-wire, delta-connected system with a grounded midpoint, the conductor with the higher phase voltage must be marked with which color?

In a 4-wire, delta-connected system with a grounded midpoint, the convention for color coding is important for ensuring safety and proper identification of conductors. Typically, in such systems, the color bands are used to signify phases or voltage levels in order to maintain consistency and safety standards.

The conductor with the higher phase voltage being marked in orange is aligned with standard color coding practices that designate specific colors for particular roles. Orange often represents conductors dealing with higher voltages or for those specific to substantial load phases. This helps in providing a clear and immediate visual cue to electricians and technicians in the field, reducing the risk of mistakes which could arise from confusion.

The other colors such as red, blue, and yellow have specific roles as well, commonly used in various configurations and may represent different phase levels or operational contexts in electrical systems. However, in this particular scenario, the use of orange for the conductor with the higher phase voltage adheres to the established conventions for safety and clarity within delta connections.