scope:

This document applies to:

• General installation techniques

• The installation of signalling works applicable to the Infrastructure, including temporary works

• The installation of specific types of signalling systems and equipment, but not the trainborne parts of track-to-train systems.

This document also applies to maintenance work and repairs, including like-for-like replacement of equipment. However, reference should also be made to the appropriate maintenance standards and Signal Maintenance Testing standards.

This document does not cover:

• The manufacture of individual items of equipment;

• The installation of trainborne equipment; or

• Equipment ordering details and processes.

An index of the modules is contained in Appendix A with a topic index in Appendix B.

Purpose

This document requires that any installation of signalling equipment on Network Rail Managed Infrastructure provides:

• An operationally safe installation of new or altered systems and equipment, with safe interfaces between systems

• That safe methods of work are adopted, with safe interfaces between all parties involved or affected

• A correct and consistent interpretation of design detail

• A neat and tidy appearance

• Compliance with the client's specified requirements, so that the installation is dependable, fit for purpose and free from defect

• Adequate testability

• Safe and easy maintenance.