In a 4-wire, delta-connected system where one phase winding is grounded, what color should the conductor with the higher phase voltage to ground be marked?

In a 4-wire, delta-connected system, the color coding for conductors is based on standard practices that often utilize specific colors to denote different phases. In this system, where one phase winding is grounded, the conductor that has the highest phase voltage to ground is typically marked with the color orange.

This is in line with the general convention of marking the conductors to prevent confusion and to ensure safety during maintenance and operation. Orange is used to signify a phase conductor that may have a higher potential compared to others, thus making it easier for technicians to identify which phase is associated with the higher voltage, especially in a grounded system.

This practice plays a critical role in ensuring the safety and efficiency of electrical work, as it helps prevent accidental contact with a higher voltage phase, reducing the risk of electrical shocks and equipment damage.