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NR BR 820

Specification for Colours of Light Signals, Colour Filters and Lenses

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Organization: NR
Publication Date: 1 August 1974
Status: active
Page Count: 15
scope:

This specification covers the requirements for colours of light signals and the colorimetric and photometric requirements for colour filters and lenses used in connection with signalling on British Railways and road traffic signals at level crossings.

Document History

NR BR 820
August 1, 1974
Specification for Colours of Light Signals, Colour Filters and Lenses
This specification covers the requirements for colours of light signals and the colorimetric and photometric requirements for colour filters and lenses used in connection with signalling on British...

References

This document is referenced by:
NR BR 1651 PART 3 - Fibre Optic Banner Signal
Published by NR on March 1, 1991
This specification covers the requirements for a Banner Signal using Fibre Optic Light guides. The Signal is required to display a circular lit indication on which there is superimposed either a...
This document is referenced by:
NR BR 1651 PART 2 - Specification for Fibre Optic Stencil Indicators
Published by NR on March 1, 1991
This specification covers the requirements of Alpha Numeric Miniature Route Indicators (Stencil) using Fibre Optic Light guides. Each alpha numeric indication to be illuminated only from its own...
This document is referenced by:
NR BR 1829 - Specification for Glass Sheet: Flashed Opal on Pot Blue for Signal Indicators
Published by NR on June 1, 1982
The glass is required for use with internally illuminated panel indicators which are required to be normally obscure in the dark condition and to provide a reasonably sharp white image indication of...
This document is referenced by:
NR BR 1651 PART 5 - Fibre Optic Train Operated Points Indicator
Published by NR on March 1, 1991
This specification covers the requirements for Train Operated Points Indicator using Fibre Optic Light guides. The Indicator Unit is required to display either a red rectangular indication or a...
This document is referenced by:
NR BR 1651 PART 1 - Specification for Fibre Optic Theatre-Type Route Indicators
Published by NR on March 1, 1991
This specification covers the requirements of Alpha Numeric Route Indicators (Theatre) using Fibre Optic Light guides. Each alpha numeric indication to be illuminated only from its own designated...
This document is referenced by:
NR BR 1970 - Drivers Crossing Indicator at Automatic Level Crossings
Published by NR on April 1, 1991
This specification covers the requirements for manufacture of a Drives Crossing Indicator (DCI) which is to be suitable for mounting on the railway lineside at the approach to Automatic Level...
This document is referenced by:
DEF STAN 02-328 - Desalination Plants
Published by MODUK on April 1, 2000
This NES specifies the requirements for desalination plants in HM Ships including Submarines. Vapour compression plants are not specified for HM Ships and Submarines and are not included.
This document is referenced by:
DEF STAN 02-728 - Requirements for Domestic Hot and Cold Fresh Water Systems
Published by MODUK on September 3, 2010
This Defence Standard (Def Stan) defines the requirements for: a) The design, manufacture, installation, test and Setting–to–Work of Domestic Hot and Cold Fresh Water (FW) Systems in HM Surface Ships...
This document is referenced by:
NR/GN/SIG/CAT006 - Index of NR Documents Relating to Signalling & Communications Equipment
Published by NR on June 2, 2012
This standard represents historical information and best practice for equipment and systems that are still found on the infrastructure. This is not a mandatory standard and users should check...
This document is referenced by:
NR/L2/SIG/19820 ISSUE 12 - Signalling and Level Crossing Product Specifications
Published by NR on December 2, 2023
This manual documents current Network Rail signalling product specifications. It applies to any organisation involved in the development of any product that will be approved through the product...
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