BS 376-2:2015 - Railway signalling symbols. Specification for symbols for circuit diagrams

BS 376-2:2015

Railway signalling symbols. Specification for symbols for circuit diagrams

Status : Current   Published : April 2015



This British Standard specifies the symbols to be used on railway signalling circuit diagrams but does not provide guidance on their application.

It also gives a standard system of nomenclature and labelling of wires such that each wire can be readily identified with that shown on the circuit diagram.

This British Standard does not cover symbols for high voltage power distribution, telecommunications or electronic products. These are covered in IEC 60617 or an appropriate British Standard.

This British Standard does not include proprietary systems and specialized applications.


The symbols in this British Standard provide for apparatus in general use. Wiring symbols have been designed so that they can be combined together where one does not represent the complete device. In this British Standard, where certain elements are added for illustrative purposes, they are shown by dashed lines. If additional information is required to support the symbol, a “#” may be used to reference a note on the diagram.


The size of symbols as drawn are in proportion but are not necessarily relative to one another; nor do they give the specific size to be used. The relative thickness of lines may also be varied, e.g. for contact elements.

Standard NumberBS 376-2:2015
TitleRailway signalling symbols. Specification for symbols for circuit diagrams
Publication Date30 April 2015
Normative References(Required to achieve compliance to this standard)BS 7645, BS 8586
Informative References(Provided for Information)BS 7671, IEC 60617:2012
ReplacesBS 376-2:1954
Draft Superseded By14/30283498 DC
DescriptorsRailway signals, Railway control systems, Circuit diagrams, Electric wiring systems, Symbols, Graphic symbols, Diagrams, Graphic representation, Letters (symbols), Graphic characters, Railway equipment, Railway fixed equipment, Technical drawing, Engineering drawings, Plans, Designations, Electric wires, Marking, Signal devices Railway applications
ISBN978 0 580 83059 4
File Size1.292 MB

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