How much slack must be provided for splicing fiber-optic cable in underground installations?

The requirement for 15 meters of slack in underground fiber-optic cable installations is based on industry best practices and installation guidelines which aim to ensure long-term reliability and accessibility for maintenance. Providing adequate slack allows for potential elongation of the cable, thermal expansion or contraction, and future repairs or modifications without requiring complete replacement of sections of cable.

Fiber-optic cables can be sensitive to tension and bends; therefore, having an appropriate amount of slack also helps to reduce strain during installation and throughout the cable’s life. This slack can be particularly necessary where cables may need to be rerouted or spliced in response to changing infrastructure or environmental conditions. The allowance of 15 meters strikes a balance between ensuring enough flexibility for installation and minimizing excess that could lead to complications in cable management.