scope:

The requirements of this maintenance instruction apply to Network Rail (NR) staff and contractors.

The instruction covers inspection and maintenance of lineside cable routes primarily provided for the lineside and includes:

• Cable troughing

• Cable duct routes

• Under track crossings (UTX)

• Under road/river crossings (URX)

• Cable hangers

• Cable affixing brackets

• Cable pits/chambers

• Joint bays

It covers all materials and construction types used for that purpose. It also includes the inspection and minor maintenance of cable ground anchors and securing ties and sub-duct cable protection systems.  

Purpose

This telecoms maintenance instruction defines the inspection and minor maintenance requirements for lineside cable routes so that they can be kept in good order to suitably protect the cables within, thereby mitigating the risk of damage to the cables.