SYMBOL REFERENCE

Switch Symbols: BS EN 60617 reference for UK electricians

Every switch symbol used on UK electrical drawings — one-way through emergency stop — drawn to BS EN 60617 with installation context, BS 7671 references and use cases.

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6 min readUpdated 2026-05-18Andrew Moore, Founder of Elec-Mate

Written and reviewed by Andrew Moore, founder of Elec-Mate, against BS 7671:2018+A4:2026, IET Guidance Note 3 and the IET On-Site Guide.

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Key Takeaways

  • 1BS EN 60617 defines the graphical symbols for all UK electrical switching devices used on circuit diagrams, distribution board schedules and installation drawings.
  • 2A one-way switch has a single break in the live conductor; a two-way switch has two fixed contacts (used in pairs); an intermediate switch has four terminals and is wired between two two-way switches.
  • 3A pull-cord switch is required in bathroom zones 1 and 2 per BS 7671 Section 701 — wall switches inside the room are not permitted.
  • 4Every bathroom extractor fan needs a 3-pole fan isolator outside the bathroom for safe maintenance.
  • 5Elec-Mate auto-uses correct BS EN 60617 switch symbols on every circuit drawing and certificate generated by the platform.
02 · Symbol Reference

About Switch Symbols

Every switch symbol used on UK electrical drawings — one-way through emergency stop — drawn to BS EN 60617 with installation context, BS 7671 references and use cases.

Each symbol is drawn to BS EN 60617 — the UK adoption of the international IEC 60617 standard for graphical symbols on electrical diagrams. The same symbols appear on EICR forms, distribution board schedules, single-line schematics and installation layout drawings.

Looking for symbols in a different category? See the full BS EN 60617 symbol library covering switches, sockets, lighting, distribution, safety, containment, equipment, mechanical, renewables, controls and architectural symbols.

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