scope:

This level 2 standard applies to work that meets the selection criteria defined in NR/L2/SIG/30014/A100.

Moving block testing requirements, such as those required for ETCS / ERTMS, are excluded from the scope of the document.

Modular Signalling testing requirements are detailed in NR/L2/SIG/30014/A310, and that standard shall take precedence over this standard with respect to Modular Signalling Projects. However, where NR/L2/SIG/30014/A310 is silent on any aspect of signalling works testing, this standard shall apply instead.

Manufacturer's product testing is the quality assurance testing in the factory of discrete off the shelf products or equipment. This testing would be carried out to standard drawings in accordance with manufacturer's Quality System, and is certified by the issue of Quality Assurance Certificates or Certificates of Conformance. Manufacturer's product testing is outside the scope of signalling works testing, and is considered to be part of the supply chain quality management system.

Off Site Testing comprises any testing of bespoke, uniquely wired equipment, bespoke systems, data or software that is carried out before such equipment, systems, data or software is installed on site in its final configuration. Off site testing is within the scope of signalling works testing, and shall be carried out in accordance with the requirements of this standard.

Persons using this document for works involving novel systems are directed to seek counsel from the appropriate Safety Cases where specific and particular test requirements shall have been identified.

It is permissible for simplified design and testing processes to be followed for specific Projects as detailed in NR/L2/SIG/30014/A210, subject to that project meeting the selection criteria in NR/L2/SIG/30014/A100. Where there is a conflict between the processes and requirements shown in this standard and NR/L2/SIG/30014/A210, the requirement shown in that standard shall take precedence over this standard. However, where NR/L2/SIG/30014/A210 contains no requirements on a specific subject, then the requirement of this standard shall be followed.

Purpose

This document is part of the suite of documents contained within the Signalling Works Testing Handbook, NR/L2/SIG/30014, which together detail the requirements for signalling works testing activities.

This Level 2 document sets out the mandatory procedures and process controls necessary to confirm that new signalling installations, and alterations to existing installations, are independently tested in a manner that assures:

• Compliance with the Project specifications and Design Details; and,

• Fitness for purpose before they are offered for Entry into Operational Service.

It also provides a framework of procedures and process controls that are, as far as practicable, consistent across the Network Rail infrastructure.