When is it necessary to label pigtails in optical fiber setups?

Labeling pigtails in optical fiber setups is essential before splicing to match color codes because it helps ensure proper organization and identification of fibers. Accurate labeling allows technicians to easily identify which fiber connects to which device or termination, thereby preventing errors during the installation or maintenance processes. When pigtails are properly labeled to reflect the corresponding color codes, it facilitates troubleshooting and future modifications to the fiber network. This practice is critical for maintaining a clear and efficient optical network, particularly in complex installations with multiple fibers. By labeling before splicing, technicians can streamline the process and enhance the overall reliability of the fiber connections.