Which color cordage is used to signify single-mode fiber?

The color yellow is universally recognized for single-mode fiber optic cables. This designation helps distinguish single-mode fibers from multimode fibers, which have different color codes. Single-mode fibers, characterized by their narrow core, are designed for long-distance communication and are optimized for transmitting data over larger distances without significant signal loss.

The use of yellow cordage in fiber optics is crucial for installation and maintenance, as it allows technicians and installers to quickly identify the type of fiber being handled, reducing the risk of errors during setup or repairs. In contrast, other colors like orange are typically used to indicate multimode fiber, which differs in performance and application requirements. This standardized color-coding is essential for the efficient and safe deployment of fiber optic networks.