Smoke detector electrical symbol IEC 60617 — what it represents, where it appears in UK electrical drawings, and how it relates to the rest of the symbol library.
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01 · Symbol Reference
An optical or ionisation smoke detector to BS EN 14604 (single-station, domestic) or BS 5839-1 (fire alarm system). Interlinked types signal one another via wire or RF.
Used in: Every level of a domestic property, escape routes, places of assembly per regulations.
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02 · Symbol Reference
An optical or ionisation smoke detector to BS EN 14604 (single-station, domestic) or BS 5839-1 (fire alarm system). Interlinked types signal one another via wire or RF.
03 · Symbol Reference
Every level of a domestic property, escape routes, places of assembly per regulations.
For the full set of safety + security symbols, see the Safety + Security Symbols reference page — covering every related symbol with the same level of installation context.
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04 · Symbol Reference
Other safety + security symbols you may need on the same drawing:
An optical or ionisation smoke detector to BS EN 14604 (single-station, domestic) or BS 5839-1 (fire alarm system). Interlinked types signal one another via wire or RF.
Used in: Every level of a domestic property, escape routes, places of assembly per regulations.
A fire detector that triggers on a fixed temperature (typically 58°C) or rate-of-rise. Used where smoke detectors would false-alarm (kitchens, garages, dusty areas).
Used in: Kitchens, garages, lofts, plant rooms, smoking areas; never in dwellings without an SD elsewhere.
A carbon monoxide detector to BS EN 50291. Required in rooms with combustion appliances under the Smoke and CO Alarm Regs 2022 (England) and similar in Wales/Scotland.
Used in: Living rooms with gas fires, bedrooms above garages, rooms with solid-fuel stoves or boilers.
A fire alarm sounder to BS EN 54-3. Produces minimum 65 dB at the bedhead per BS 5839-1, with the fire-alarm tone defined in BS 5839 Annex E.
Used in: Commercial premises, HMOs, places of assembly; covered by fire risk assessment.
A combined audible + visual alarm device to BS EN 54-23. The visual indicator is required for the hearing impaired and in high-noise environments where audible signals alone may not be heard.
Used in: WCs, plant rooms, factories, schools, disabled refuge areas, swimming pools.
A manual call point to BS EN 54-11. The break-glass/press-glass element used to manually trigger the fire alarm system. Sited near exits and on escape routes.
Used in: Every fire-alarm system; on escape routes, at exits, at landing levels.
A disabled-toilet emergency assistance alarm to BS 8300. Pull-cord activator + reset button + indicator outside the WC. Required under Building Regs Part M.
Used in: Accessible WCs in commercial buildings, hospitality, public buildings.
A two-way emergency voice communication point at a disabled refuge to BS 5839-9. Allows people awaiting evacuation to communicate with the main control room.
Used in: Stairwells in multi-storey commercial buildings, evacuation lift lobbies.
A PIR or microwave motion detector for an intruder alarm system to BS EN 50131. Typically wall-mounted at 2.0-2.4 m with coverage of 12 m × 12 m for standard PIR.
Used in: Hallways, large rooms, garages; works with door contacts to form a complete zone.
A CCTV camera — typically IP (PoE-powered, RJ45) or analogue HD. Modern installations are IP cameras over Cat 6 with PoE+ for pan-tilt-zoom models.
Used in: Building entrances, car parks, retail floors, secure perimeters; data + power on one Cat 6 cable.
A proximity card, fob or biometric reader controlling a maglock or electric strike. Networked to a central controller. Often integrated with the fire alarm for auto-release on alarm.
Used in: Office entrances, server rooms, restricted-access plant rooms, multi-tenant lobbies.
An audio or video door entry panel at a main entrance. Connects to handset stations inside the building. Modern systems are IP-based over Cat 6.
Used in: Flats, apartments, gated developments, offices with controlled entry.
A green push-button that releases an electrically-locked door from inside (the egress side). Required where access control restricts movement out of a space.
Used in: Inside doors with maglocks/strikes, server rooms, secure office areas.
A domestic bell or chime triggered by a push-button at the door. Often supplied via a 12 V transformer in modern wired systems, or battery for wireless.
Used in: Front door, back door, tradesperson entrance; symbol used on domestic drawings.
A wall- or ceiling-mounted extract fan. Bathroom fans typically interlocked with the light circuit and overrun timer; kitchen fans on a separate switch.
Used in: Bathrooms, kitchens, WCs, utility rooms; needs 3-pole isolator for safe maintenance.
A room thermostat controlling heating. Mechanical, electronic or smart (Wi-Fi). Wired thermostats need a 230 V supply or a low-voltage transformer.
Used in: Living room or hallway typically; one zone per heating loop.
A wiring junction box where cables are joined. Must be accessible per BS 7671 526.3 unless maintenance-free (MF) type. Modern MF boxes use spring terminals.
Used in: Loft cables, behind sockets, lighting circuits, above accessible ceilings.
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