What is the symbol for a double 13A socket?

A double 13A socket is drawn as two semicircles connected back-to-back, sharing a common base line representing the back box. A short line crossing the symbol indicates that the socket is switched. The symbol applies to standard BS 1363 double sockets — the workhorse of every UK domestic and commercial installation.

How do I draw a fused spur on a wiring diagram?

A Fused Connection Unit (FCU / fused spur) is drawn as a small rectangle (representing the spur outlet plate) with an integral fuse holder symbol — a small open rectangle with the fuse current rating inside. Add a switch symbol on top for a switched fused spur, or omit it for an unswitched spur. Always label the spur with what it feeds and the fuse rating (typically 3A or 13A).

Why does a shaver socket have a different symbol?

A shaver socket has a different symbol because it includes an isolating transformer — drawn as two adjacent coils with no electrical connection. The transformer galvanically isolates the shaver from the supply, which is why shaver sockets are the only socket type permitted in bathroom zone 2 (BS 7671 Section 701). The output is a non-earth-referenced LV supply.

What rating is a cooker outlet supplied at?

A cooker outlet (BS 1363 cooker connection unit) is typically supplied via a 32A or 40A radial circuit. The cooker control unit is a 45A double-pole switch — sometimes with an integral 13A socket above the worktop. Older installations may use 6mm² T+E on a 32A MCB; modern range cookers may need 10mm² and a 40A MCB.

What is the difference between switched and unswitched fused spurs?

A switched fused spur has an integral rocker switch and neon indicator, allowing the appliance to be isolated without going to the consumer unit. An unswitched fused spur has only the fuse — to isolate the appliance you need to remove the fuse carrier or operate the upstream MCB. Switched is preferred for towel rails, immersion heaters, and any appliance that benefits from local isolation. Unswitched suits hard-wired appliances like extractor fans where local switching is undesirable.

SYMBOL REFERENCE

Socket Outlet Symbols: IEC 60617 reference for UK electricians

Every socket outlet symbol used on UK installation drawings — single 13A through to EV chargers and outdoor IP66 — drawn to IEC 60617 with BS 7671 context.

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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

01UK socket symbols use a semicircle shape — single = one semicircle, double = two semicircles back-to-back. A line through the symbol indicates the socket is switched.
02A Fused Connection Unit (FCU / fused spur) symbol shows the basic socket outline with an integral fuse holder — used to provide local protection for fixed appliances like boilers and extractor fans.
03Shaver sockets are the only socket type permitted inside bathroom zone 2 — the integral isolating transformer (BS EN 61558-2-5) galvanically separates the user from earth.
04EV charger outlet symbols indicate a dedicated BS 7671 Section 722 circuit — must include a Type A RCD or RDC-DD per Regulation 722.531.
05Outdoor IP66 socket symbols specify weatherproof, RCD-protected outlets suitable for garden tools, EV charging from a standard socket, and exterior power.

01 · Symbol Reference

Socket Outlet Symbols — Complete Symbol Set

Below are every socket outlet 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.

Single 13A switched socket outlet electrical symbol IEC 60617

Single 13A Socket Outlet

A single 13A switched socket to BS 1363. The basic socket symbol — a semicircle with a line indicating switched. UK standard for general-purpose socket circuits.

Used in: General-purpose outlets, behind appliances, individual radial circuits, kitchen specifics.

Double 13A switched socket outlet electrical symbol IEC 60617

Double 13A Socket Outlet

A twin 13A switched socket — two outlets on one back box. Drawn as two semicircles back-to-back. Standard outlet for living spaces, bedrooms and offices.

Used in: Bedrooms (typically 2-4 doubles), living rooms, kitchens, offices — the workhorse outlet.

Fused connection unit unswitched electrical symbol IEC 60617

Fused Spur (Unswitched)

A Fused Connection Unit (FCU) with internal fuse providing local protection for a fixed appliance. Unswitched version — no front rocker. Used where switching is not needed at the spur.

Used in: Boilers, extractor fans, central heating pumps, doorbells, fixed wireless access points.

Switched fused connection unit FCU electrical symbol IEC 60617

Switched Fused Spur

A Fused Connection Unit with a front-panel switch + neon indicator. Allows local isolation of the fixed appliance without resorting to the consumer unit. Most common FCU type.

Used in: Towel rails, immersion heaters, garden lighting, alarms, garage door operators.

Unswitched spur outlet electrical symbol IEC 60617

Unswitched Spur (Non-Fused)

A connection outlet without integral fuse — relies on the upstream circuit fuse or breaker for protection. Often a flex outlet plate for permanently-wired flex-connected appliances.

Used in: Flex outlets behind built-in ovens (separately fused), wall-hung TVs, fixed kitchen kit.

Cooker 45A outlet electrical symbol IEC 60617

Cooker Outlet (45A)

A 45A cooker connection point — usually a 45A DP switch with optional 13A socket above the worktop, feeding the cooker outlet plate behind the appliance.

Used in: Electric range cookers, double ovens, hobs over 7.2 kW; supplied on its own radial circuit.

Shaver Socket

A bathroom-compliant socket with built-in isolating transformer to BS EN 61558-2-5. Permitted in bathroom zone 2 because the transformer galvanically isolates the user from earth.

Used in: Bathrooms, en-suites, hotel rooms — the only socket type permitted in bathroom zones.

USB charging socket outlet electrical symbol IEC 60617

USB Socket

A 13A socket outlet with integrated USB-A or USB-C charging ports. Combines mains and low-voltage charging in one back box. Specify USB-C PD for modern devices.

Used in: Bedside, desks, hotel rooms, kitchen islands — anywhere phones and tablets need charging.

Data RJ45 ethernet socket electrical symbol IEC 60617

Data Socket (RJ45)

A structured cabling outlet to BS EN 50173. Cat 5e (1 Gb/s), Cat 6 (1 Gb/s longer reach), or Cat 6A (10 Gb/s). Terminated in an RJ45 module.

Used in: Office desks, WiFi access points, CCTV camera locations, hard-wired smart home devices.

Telephone master socket electrical symbol IEC 60617

Telephone Socket

A telephone master or extension socket. UK master socket has BT engineer test socket; extensions are wired to the master. Increasingly replaced by RJ45 data sockets.

Used in: Legacy phone wiring, fax machines, alarm phone diallers, FTTC modems.

TV aerial coaxial socket electrical symbol IEC 60617

TV Aerial Socket

A coaxial outlet for TV aerial, FM/DAB radio or satellite. Multi-output back boxes can combine TV + FM + satellite in one face plate.

Used in: Living rooms, bedrooms, kitchens; satellite outlets need separate F-type connectors.

Communications cabinet rack electrical symbol IEC 60617

Comms Cabinet Outlet

A communications/networking cabinet — typically a 12U or 18U wall-mounted rack housing the patch panel, network switch, router and structured-cabling termination.

Used in: Loft, plant room, under-stairs; central termination point for all data sockets in a building.

EV Charger Outlet

An electric vehicle charge point to BS 7671 Section 722. Typically 7.2 kW single-phase or 22 kW three-phase, with Type 2 (Mennekes) socket or tethered lead.

Used in: Driveways, car parks, fleet depots; needs dedicated circuit + Type A RCD or RDC-DD per 722.531.

Outdoor weatherproof IP66 socket electrical symbol IEC 60617

Outdoor IP66 Socket

A weatherproof socket to IP66 ingress protection. Hinged cover seals against dust and powerful water jets. Must be RCD protected per BS 7671.

Used in: Gardens, sheds, outdoor power tools, Christmas lights, pond pumps, EV charging from a standard socket.

Floor Socket (Floor Box)

A flush-mounted socket installed in the floor — typically a floor box with two 13A sockets and data outlets. Used in open-plan offices where wall outlets are too distant.

Used in: Open-plan offices, conference rooms, retail floor displays, exhibition halls.

02 · Symbol Reference

About Socket Outlet Symbols

Every socket outlet symbol used on UK installation drawings — single 13A through to EV chargers and outdoor IP66 — drawn to IEC 60617 with BS 7671 context.

Each symbol is drawn to IEC 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 IEC 60617 symbol library covering switches, sockets, lighting, distribution, safety, containment, equipment, mechanical, renewables, controls and architectural symbols.

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