What does a yellow cable signify on a project that follows standard-based color code recommendations?

In projects that adhere to standard-based color code recommendations, a yellow cable signifies singlemode optical fiber. Singlemode fiber is characterized by its smaller core diameter, which allows only one mode of light to propagate. This design leads to lower attenuation and greater bandwidth over longer distances compared to multimode fiber.

The use of a standardized color code helps technicians and installers quickly identify the type of cable used, which is crucial for effective installation, troubleshooting, and maintenance. Yellow is distinctly associated with singlemode optical fiber across various industry standards, making it a vital guideline for ensuring compliance and consistency in cabling projects.