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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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.
01 · Symbol Reference
Switch Symbols — Complete Symbol Set
Below are every switch symbols on the Elec-Mate symbol library, drawn to BS EN 60617. Right-click any symbol to save the SVG, or use the AI Diagram Builder to drag them directly into a circuit drawing.
One-Way Switch
A single switch that breaks or makes the live conductor to a load from one position. The most common domestic switch — used for a single lighting circuit controlled from one location.
Used in: Most lighting circuits, fans, immersion heaters, fixed loads with single control.
A switch with two fixed contacts and one common, allowing control of the same load from two locations. Always used in pairs with a second 2-way switch (e.g. staircase, hall-and-landing).
Used in: Staircases, halls with two entries, long corridors, bedrooms with both door and bedhead switches.
A switch with a variable resistor or electronic dimming module that controls light output. Specify type — leading-edge for incandescent, trailing-edge or LED-rated for modern LED drivers.
Used in: Living areas, dining rooms, bedrooms; check the dimmer is compatible with the driver type.
Two switches in one plate, each controlling a separate circuit. Often shown as a single symbol with two action lines or as two adjacent switch symbols on the drawing.
Used in: Bathrooms (light + extractor fan), kitchens (main light + over-cooker light), living rooms (two zones).
A ceiling-mounted switch operated by a hanging cord. Required in zone 1 and zone 2 of bathrooms where wall switches inside the room are not permitted under BS 7671 Section 701.
Used in: Bathrooms (BS 7671 701.512.3 compliant), shower rooms, en-suites; also used for high-level switches.
A 3-pole isolating switch that disconnects live, neutral and switched-live to a bathroom extractor fan. Required for safe maintenance — must be accessible but outside the bathroom zones.
Used in: Outside bathroom door, above the fan or in an adjacent room; needed on every extractor fan installation.
A switch incorporating a passive infrared movement sensor. Turns the load on when motion is detected and off after a programmed time-out. Often combined with a manual override.
Used in: Toilets, corridors, stairwells, loft hatches, security lighting; reduces energy use in low-occupancy areas.
A switch that controls load duration — either a momentary push-to-time or a 24-hour/weekly programmable timer. Common for immersion heaters, towel rails, and outdoor lighting.
Used in: Hot water tanks, towel rails, security lights, irrigation systems, signage lighting.
A switch operated only with a key — used where unauthorised operation must be prevented. Common in schools, retail, plant rooms and emergency override circuits.
Used in: School halls, server rooms, retail shutters, emergency overrides, alarm bypass switches.
A latching push-button that immediately disconnects supply to dangerous equipment. Mushroom head, red on yellow background. Must be reset deliberately — twist-release or key-reset.
Used in: Workshops, kitchens (cooker isolation), production lines, lifts, swimming pool plant rooms.
A switching device that fully isolates a circuit or item of equipment for maintenance. Must be lockable in the OFF position per BS 7671 Section 537. Different from a functional switch.
Used in: Boilers, immersion heaters, EV chargers, solar PV DC isolators, sub-mains, plant equipment.
A 45A double-pole switch with a neon indicator, used for high-load fixed appliances. Switches both live and neutral. Often labelled with the load it controls.
Used in: Electric showers, panel heaters, immersion tanks, towel rails — anything above 13A.
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.
Use these symbols in real drawings
The Elec-Mate AI Diagram Builder gives you every BS EN 60617 symbol on a draggable canvas — perfect for circuit diagrams, certificate schedules…
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