scope:

This guidance note applies to the design and installation of negative bonding and associated equipment on D.C. Electrified Lines, including the requirements for new installations and alterations to existing equipment.

The interfaces between negative bonding and track circuit bonding are dealt with in other standards.

Purpose

This specification states the best practice for the design, manufacture, installation and testing of negative bonding and associated equipment on Network Rail D.C. Electrified Lines including those which are designated 'standard current' and those designated 'high current'.

This document is to be read in conjunction with the Electric Track Equipment drawings and NR/SP/ELP/21104 'Design and Installation of Electric Track Equipment for D.C. Electrified Lines'