What is the color code for the marking of the conductor with higher phase voltage to ground in a 4 wire delta connection?

In a 4-wire delta connection, the color code for marking conductors is specifically important for identifying the phase voltages. The higher phase voltage to ground is typically marked with a distinct color that is consistent within standards to prevent confusion during installation and maintenance.

The correct choice identifies that in various color coding standards, orange is designated for conductors that carry the higher phase voltage to ground. This color is chosen because it's widely recognized and minimizes the risk of accidents and errors in identification when working with high voltage systems.

Using this color coding helps electricians distinguish between different conductors easily and ensures that the correct procedures are followed during electrical installations and troubleshooting. Maintaining consistency in color coding aids in understanding the system's wiring layout, thus enhancing safety and operational efficiency.