What is the importance of using green insulation with yellow stripes on certain branch circuits?

Using green insulation with yellow stripes on certain branch circuits is important because it specifically designates isolated ground conductors. This type of color coding serves to clearly identify conductors that have a separate grounding system intended to reduce electrical noise and improve the performance of sensitive electronic equipment.

Isolated ground conductors are typically used in environments where it is critical to minimize electrical interference, such as computer rooms or data centers. By marking these conductors with green and yellow stripes, electricians and maintenance personnel can readily recognize their purpose during installation, maintenance, and troubleshooting activities, thus enhancing safety and ensuring proper circuit function.

The other colors or options might serve different purposes, but they do not specifically relate to the identification and use of isolated ground conductors in the same way.