Symbol list

Single-line diagram symbols

Every symbol you can put on a single-line diagram in 1wire, with its name, the other names it goes by and its variants. Search the way you talk: outlet, fuse box, latching relay or RCD all lead to the right symbol.

69 symbols 144 variants 10 categories

Sockets and data 2

Socket

Also known as socket outlet, power outlet, outlet, wall socket, power point, receptacle, plug socket

The standard symbol for an earthed socket with child protection. The number of sockets, earthing, child protection and water resistance are set per socket.

Show 10 variantsHide variants
  • Earthed socket symbol in a single-line diagram Earthed socket
  • Double socket symbol in a single-line diagram Double socket 2 sockets, twin socket
  • Triple socket symbol in a single-line diagram Triple socket 3 sockets
  • Socket without earthing symbol in a single-line diagram Socket without earthing unearthed socket, without protective conductor
  • Socket without child protection symbol in a single-line diagram Socket without child protection without shutters
  • Waterproof socket symbol in a single-line diagram Waterproof socket splash-proof, IP44, IP55, outdoor socket, bathroom
  • Three-phase socket symbol in a single-line diagram Three-phase socket 400V, 3-phase, power socket, perilex
  • Socket with built-in transformer symbol in a single-line diagram Socket with built-in transformer shaver socket, isolating transformer
  • Socket with circuit breaker and VOB cable symbol in a single-line diagram Socket with circuit breaker and VOB cable socket circuit
  • Socket with circuit breaker and XVB cable symbol in a single-line diagram Socket with circuit breaker and XVB cable

Data socket

Also known as data contact box, RJ45, UTP, network socket, network point, ethernet, internet

A connection point for a network cable (RJ45). Useful for showing network points on the floor plan as well.

Lighting 5

Light point

Also known as light, lamp, light fitting, luminaire, ceiling light

The cross in a circle: the basic symbol for every fixed lighting point. A wall light or a waterproof fitting is a setting of the same symbol.

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  • Light point symbol in a single-line diagram Light point
  • Wall light symbol in a single-line diagram Wall light wall lamp, wall fitting, sconce
  • Waterproof light point symbol in a single-line diagram Waterproof light point outdoor light, bathroom light, IP44

Emergency lighting

Also known as emergency light, escape lighting, exit sign, safety lighting, emergency luminaire

A light point that stays on during a power cut. You choose between central emergency lighting (fed from a central battery) and decentral emergency lighting (with its own battery in the fitting).

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  • Decentral emergency lighting symbol in a single-line diagram Decentral emergency lighting self-contained, built-in battery
  • Central emergency lighting symbol in a single-line diagram Central emergency lighting central battery

Spotlight

Also known as spot, downlight, recessed spotlight, halogen spot, surface-mounted spot

The symbol for a spotlight or recessed downlight. If the spotlight runs on extra-low voltage, draw the transformer in front of it.

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  • Spotlight symbol in a single-line diagram Spotlight
  • Spotlight with transformer symbol in a single-line diagram Spotlight with transformer 12V spot, low-voltage spot, halogen

Fluorescent light

Also known as fluorescent tube, TL tube, strip light, batten light, neon light

The symbol for a fitting with a fluorescent tube (TL). Also suitable for a linear LED fitting that replaces a fluorescent fitting.

LED

Also known as LED lamp, LED lighting, LED fitting, LED spot

The symbol for LED lighting, as a fitting or as an LED strip. LED lighting with a separate driver or transformer is drawn with that power supply in front of it.

Show 4 variantsHide variants
  • LED symbol in a single-line diagram LED
  • LED strip symbol in a single-line diagram LED strip LED tape, LED ribbon
  • LED with transformer symbol in a single-line diagram LED with transformer
  • LED with converter (driver) symbol in a single-line diagram LED with converter (driver) LED driver, LED power supply

Switches, push buttons and relays 11

Switch (single-pole)

Also known as light switch, one-way switch, single switch, on/off switch, wall switch

The ordinary light switch. The number of poles, an indicator light, a pull cord or a delayed opening are settings of the same symbol.

Show 11 variantsHide variants
  • Single-pole switch symbol in a single-line diagram Single-pole switch
  • 2-pole switch symbol in a single-line diagram 2-pole switch double-pole switch, DP switch
  • 3-pole switch symbol in a single-line diagram 3-pole switch triple-pole switch
  • Switch with indicator light symbol in a single-line diagram Switch with indicator light illuminated switch, pilot light
  • Switch with signal lamp symbol in a single-line diagram Switch with signal lamp signal light
  • Waterproof switch symbol in a single-line diagram Waterproof switch outdoor switch, IP44
  • Pull-cord switch symbol in a single-line diagram Pull-cord switch pull switch, ceiling pull switch
  • Switch with delayed opening symbol in a single-line diagram Switch with delayed opening time delay, delayed off
  • Switch + light point symbol in a single-line diagram Switch + light point lighting circuit, one-way switching
  • 2-pole switch + light point symbol in a single-line diagram 2-pole switch + light point
  • Switch + spotlight symbol in a single-line diagram Switch + spotlight

Two-way switch

Also known as 2-way switch, staircase switch, two-way switching, landing switch, 3-way switch

With two two-way switches you control one light point from two places, for example at the bottom and top of a staircase.

Show 3 variantsHide variants
  • Two-way switch symbol in a single-line diagram Two-way switch
  • Two-way switching with light point symbol in a single-line diagram Two-way switching with light point 2x switch + light, two switches
  • Two-way switching with spotlight symbol in a single-line diagram Two-way switching with spotlight

Intermediate switch

Also known as intermediate switching, crossover switch, 4-way switch, three-point switching

Placed between two two-way switches, an intermediate switch lets you control one light point from three or more places.

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  • Intermediate switch symbol in a single-line diagram Intermediate switch
  • Intermediate switching with light point symbol in a single-line diagram Intermediate switching with light point 3x switch + light, three switches
  • Intermediate switching with spotlight symbol in a single-line diagram Intermediate switching with spotlight

Changeover switch

Also known as double switch, series switch, two-circuit switch, selector switch

A switch that sends the current to one output or the other, for example to control two light points separately.

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  • Changeover switch symbol in a single-line diagram Changeover switch
  • Changeover switch with two branches symbol in a single-line diagram Changeover switch with two branches

Dimmer

Also known as dimmer switch, light dimmer, rotary dimmer, LED dimmer

A dimmer controls the light level. You draw it as a switch with a dimming function, or as a dimmer relay operated by push buttons.

Show 4 variantsHide variants
  • Dimmer (switch) symbol in a single-line diagram Dimmer (switch)
  • Dimmer (relay) symbol in a single-line diagram Dimmer (relay) dimmer relay, dimmer module, universal dimmer
  • Push button with dimmer symbol in a single-line diagram Push button with dimmer
  • Push button + dimmer + light point symbol in a single-line diagram Push button + dimmer + light point

Shutter switch

Also known as roller shutter switch, blind switch, shutter control, awning, sun screen

A switch or push button with up and down control for a roller shutter, screen or awning.

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  • Shutter switch symbol in a single-line diagram Shutter switch
  • Shutter push button symbol in a single-line diagram Shutter push button

Push button

Also known as push switch, momentary switch, bell push, pushbutton

A push button gives a short pulse, for example to an impulse switch, a timer switch, a dimmer or a doorbell.

Show 7 variantsHide variants
  • Push button symbol in a single-line diagram Push button
  • Push button with signal lamp symbol in a single-line diagram Push button with signal lamp illuminated push button
  • Waterproof push button symbol in a single-line diagram Waterproof push button outdoor, IP44
  • Double push button symbol in a single-line diagram Double push button 2 push buttons
  • Push button with impulse switch symbol in a single-line diagram Push button with impulse switch
  • Push button with timer switch symbol in a single-line diagram Push button with timer switch
  • Push button + impulse relay + light point symbol in a single-line diagram Push button + impulse relay + light point

Impulse switch

Also known as impulse relay, latching relay, bistable relay, teleruptor, step relay

A relay that toggles with every pulse from a push button: press once for on, press again for off. This lets you control a light point from as many places as you like.

Timer switch

Also known as staircase timer, time delay relay, timer, time switch, minuterie

A relay that switches off by itself after a set time, typically for the lighting of a stairwell or corridor.

Relay

Also known as auxiliary relay, control relay, contactor, relay coil

The general symbol for a relay: an electrically operated switch.

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  • Relay symbol in a single-line diagram Relay
  • Contact symbol in a single-line diagram Contact control contact, make contact, normally open contact

Thermostat

Also known as room thermostat, temperature controller

A thermostat switches a heating or cooling appliance depending on the temperature.

Distribution boards and protection 9

Distribution board

Also known as consumer unit, fuse box, electrical panel, breaker panel, fuse board, sub-board

The busbar the circuits of a board leave from. A sub-board is drawn as a distribution board behind a circuit breaker.

Show 3 variantsHide variants
  • Distribution board symbol in a single-line diagram Distribution board
  • Circuit breaker with sub-board symbol in a single-line diagram Circuit breaker with sub-board sub-board, sub-distribution board, sub-panel
  • Distribution board pictogram symbol in a single-line diagram Distribution board pictogram pictogram, board on the floor plan

Circuit breaker

Also known as MCB, miniature circuit breaker, breaker, automatic fuse, circuit

The automatic fuse that protects a circuit against overload and short circuits. Poles, current rating, curve and breaking capacity are filled in per breaker.

Show 5 variantsHide variants
  • 2-pole circuit breaker symbol in a single-line diagram 2-pole circuit breaker
  • 4-pole circuit breaker symbol in a single-line diagram 4-pole circuit breaker three-phase, 3P+N
  • Circuit breaker with VOB cable symbol in a single-line diagram Circuit breaker with VOB cable circuit, new circuit
  • Circuit breaker with XVB cable symbol in a single-line diagram Circuit breaker with XVB cable
  • Selective circuit breaker symbol in a single-line diagram Selective circuit breaker main breaker, selective

Differential switch (RCD)

Also known as RCD, residual current device, RCCB, earth leakage switch, differential, GFCI, 30 mA, 300 mA

Protects against leakage currents to earth. The diagram shows the type (A or B), the sensitivity (for example 30 mA or 300 mA) and the number of poles.

Show 3 variantsHide variants
  • Type A 2-pole differential switch symbol in a single-line diagram Type A 2-pole differential switch type A, RCD type A
  • Type B 2-pole differential switch symbol in a single-line diagram Type B 2-pole differential switch type B, RCD type B, car charger
  • Main differential switch 300 mA 4-pole symbol in a single-line diagram Main differential switch 300 mA 4-pole main RCD, 300mA

Fuse

Also known as cartridge fuse, fuse holder, NH fuse, fuse link

A melting fuse: a protection whose wire burns through on overcurrent. You find them before the meter and in older installations, among other places.

Surge protection

Also known as SPD, surge protective device, surge arrester, lightning protection, surge protector

Protects the installation against voltage spikes, for example from a lightning strike nearby.

kWh meter

Also known as electricity meter, energy meter, digital meter, smart meter, meter

The meter that records consumption. It usually sits at the very top of the single-line diagram, between the connection and the main protection.

Earthing

Also known as earth, ground, grounding, earth electrode, earth loop, earth rod

The symbol for the earth connection of the installation, such as an earth loop or earth rod.

Earth bar

Also known as earth terminal, main earthing terminal, equipotential bonding, bonding bar, ground bar

The bar where the protective conductors and the equipotential bonding conductors come together.

Transformer

Also known as bell transformer, safety transformer, isolating transformer, transfo

Converts the mains voltage to a different voltage, for example for a doorbell or extra-low-voltage lighting.

Show 2 variantsHide variants
  • Transformer symbol in a single-line diagram Transformer
  • Transformer with doorbell symbol in a single-line diagram Transformer with doorbell bell transformer

Cables and branch points 3

Cable

Also known as wire, wiring, conductor, VOB, XVB, EXVB, XGB, cross-section, cable type

The cable between two components, with its type, number of conductors, cross-section and installation method. For a cable in conduit or underground, adjust the settings.

Show 4 variantsHide variants
  • VOB cable symbol in a single-line diagram VOB cable VOB 2.5, VOB wire, installation wire
  • XVB cable symbol in a single-line diagram XVB cable XVB 3G2.5
  • Underground EXVB cable symbol in a single-line diagram Underground EXVB cable underground cable, buried cable, EXVB
  • Cable without details symbol in a single-line diagram Cable without details empty cable, connection

Branch point

Also known as junction box, junction, splice box, branch box, split

The point where a cable splits to several components, as in a junction box.

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  • Branch point symbol in a single-line diagram Branch point
  • Branch point with two branches symbol in a single-line diagram Branch point with two branches

Connection point

Also known as connection terminal, terminal block, terminal, connector, Wago

A connection point in a cable. With a terminal you indicate that the connection is made with a connection terminal.

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  • Connection point symbol in a single-line diagram Connection point
  • Connection terminal symbol in a single-line diagram Connection terminal

Appliances 13

Device (general)

Also known as device, appliance, other device, fixed appliance, load

The general symbol for a permanently connected appliance that has no symbol of its own. Write the name of the appliance next to it.

Cooker / hob

Also known as cooker, hob, induction hob, induction, ceramic hob, cooktop, stove

The symbol for an electric cooker or (induction) hob.

Oven

Also known as built-in oven, combi oven, electric oven

The symbol for an electric oven. A steam oven has its own variant.

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  • Oven symbol in a single-line diagram Oven
  • Steam oven symbol in a single-line diagram Steam oven steamer

Microwave

Also known as microwave oven

The symbol for a microwave oven.

Fridge

Also known as refrigerator, cooler

The symbol for a fridge.

Freezer

Also known as deep freezer, chest freezer

The symbol for a freezer or chest freezer.

Dishwasher

Also known as dish washer

The symbol for a dishwasher.

Washing machine

Also known as washer, laundry machine

The symbol for a washing machine.

Tumble dryer

Also known as dryer, clothes dryer

The symbol for a tumble dryer.

Fan

Also known as extractor hood, cooker hood, extractor fan, ventilation, ventilation unit

The symbol for a fan, cooker hood or ventilation unit.

Motor

Also known as electric motor, gate motor, garage door motor

The symbol for an electric motor, for example of a garage door.

Pump

Also known as water pump, submersible pump, circulation pump, rainwater pump, well pump

The symbol for a pump, such as a rainwater pump or submersible pump.

Car charger

Also known as EV charger, car charging station, charging point, wallbox, electric car, EV

The symbol for a charging point for an electric vehicle. You can draw the charger with its own symbol or as a device.

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  • Car charger symbol in a single-line diagram Car charger
  • Car charger as a device symbol in a single-line diagram Car charger as a device

Heating and cooling 7

Electric heater

Also known as heater, radiator, convector, electric radiator, heating

The symbol for an electric heater. Storage heating and a heater with a fan are settings of the same symbol.

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  • Electric heater symbol in a single-line diagram Electric heater
  • Storage heater symbol in a single-line diagram Storage heater storage heating, night storage heater, off-peak
  • Heater with fan symbol in a single-line diagram Heater with fan fan heater, fan convector

Boiler

Also known as water heater, electric boiler, hot water cylinder, hot water

The symbol for an electric water heater. A boiler with storage is a setting of the same symbol.

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  • Boiler symbol in a single-line diagram Boiler
  • Boiler with storage symbol in a single-line diagram Boiler with storage storage water heater, off-peak

Central heating boiler

Also known as boiler, central heating, gas boiler, condensing boiler, oil boiler, furnace

The symbol for the boiler of the central heating. The energy source (electricity, gas, liquid or solid fuel) is shown in the symbol.

Show 6 variantsHide variants
  • Central heating boiler symbol in a single-line diagram Central heating boiler
  • Gas boiler (with fan) symbol in a single-line diagram Gas boiler (with fan) condensing boiler
  • Gas boiler (atmospheric) symbol in a single-line diagram Gas boiler (atmospheric)
  • Liquid fuel boiler symbol in a single-line diagram Liquid fuel boiler oil boiler, heating oil
  • Solid fuel boiler symbol in a single-line diagram Solid fuel boiler pellets, wood, pellet boiler
  • Electric central heating boiler symbol in a single-line diagram Electric central heating boiler

Heat pump

Also known as air-to-water heat pump, air-to-air heat pump, geothermal heat pump, ground source heat pump

The symbol for a heat pump.

Air conditioner

Also known as air conditioning, airco, AC unit, split unit, cooling

The symbol for an air conditioning unit.

Combined heat and power (CHP)

Also known as CHP, cogeneration, micro-CHP

The symbol for an installation that generates heat and electricity at the same time.

Heat exchanger

Also known as heat recovery, heat recovery unit

The symbol for a heat exchanger.

Solar panels, batteries and backup power 6

Solar panel

Also known as solar panels, PV, PV panel, photovoltaic, PV system, solar installation

The symbol for solar panels. Brand, type, peak power and voltage go in the text field of the symbol.

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  • Solar panel symbol in a single-line diagram Solar panel
  • Converter with solar panel symbol in a single-line diagram Converter with solar panel PV inverter, solar inverter

Home battery

Also known as battery, battery storage, energy storage, storage battery

The symbol for a battery or home battery, with capacity and power in the text field.

Show 3 variantsHide variants
  • Battery symbol in a single-line diagram Battery
  • Converter with battery symbol in a single-line diagram Converter with battery battery inverter
  • Converter with two solar panels and battery symbol in a single-line diagram Converter with two solar panels and battery hybrid installation

AC/DC converter

Also known as AC/DC, converter, rectifier, power supply, adapter, inverter, PSU

The symbol for a converter or power supply between alternating current (AC) and direct current (DC).

Hybrid inverter

Also known as inverter with backup, backup inverter, EPS output, battery inverter, backup power

An inverter with a normal output and a separate backup output that keeps circuits powered during a grid outage.

Transfer module (ATS)

Also known as ATS, automatic transfer switch, transfer switch, changeover module, backup box, backup power

A distribution board with a module that automatically switches to the backup supply during a grid outage.

EPS system (backup power)

Also known as backup power, backup power circuit, backup, EPS, emergency power supply

A complete backup power setup in one go: the board with transfer module, the hybrid inverter and the connection between them.

Domotics 2

Domotics module

Also known as home automation, smart home, domotics, home automation controller, output module, KNX, Niko Home Control

A home automation module with inputs and outputs, to which you connect the controlled circuits.

Domotics control

Also known as home automation control, smart switch, controlled socket, controlled light point

A component controlled or read by the home automation system: a socket, light point, push button or switch.

Show 4 variantsHide variants
  • Domotics light point control symbol in a single-line diagram Domotics light point control
  • Domotics socket control symbol in a single-line diagram Domotics socket control
  • Domotics push button control symbol in a single-line diagram Domotics push button control
  • Domotics light switch control symbol in a single-line diagram Domotics light switch control

Doorbells, detection and safety 11

Doorbell

Also known as bell, door chime, chime

The symbol for a doorbell. A doorbell on extra-low voltage is drawn with the bell transformer in front of it.

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  • Doorbell symbol in a single-line diagram Doorbell
  • Doorbell with transformer symbol in a single-line diagram Doorbell with transformer

Buzzer

Also known as sounder, signal buzzer

The symbol for a buzzer.

Siren

Also known as alarm, alarm siren, sounder

The symbol for a siren, for example of an alarm system.

Electric door lock

Also known as door lock, electric strike, door opener, electric lock, magnetic lock

The symbol for an electric lock or electric door opener.

Smoke detector

Also known as smoke alarm, fire alarm, fire detector

The symbol for a smoke detector or smoke alarm.

Gas detector

Also known as gas alarm, gas leak detector

The symbol for a gas detector.

Heat detector

Also known as heat alarm, thermal detector

The symbol for a heat detector, which reacts to temperature rather than smoke.

Flame detector

Also known as flame sensor

The symbol for a flame detector.

Detector (general)

Also known as detector, sensor

The general symbol for a detector without a specific type.

Motion detector

Also known as motion sensor, presence detector, occupancy sensor, PIR, infrared

Switches lighting or an alarm on movement. The detection principle (infrared, radar or ultrasonic) is shown in the symbol.

Show 3 variantsHide variants
  • IR motion detector symbol in a single-line diagram IR motion detector PIR, infrared
  • Radar motion detector symbol in a single-line diagram Radar motion detector HF, high frequency, microwave sensor
  • Ultrasonic motion detector symbol in a single-line diagram Ultrasonic motion detector ultrasonic

Motion sensor

Also known as presence sensor, sensor, PIR sensor

The symbol for a motion sensor, for example as an input of a home automation or alarm system.

In 1wire

Using these symbols in your single-line diagram

1

Find the symbol

The symbol library sits to the left of the drawing sheet. Its search field knows the same names and synonyms as this page.

2

Place it on the diagram

Click the symbol, then click where it belongs in the diagram. 1wire makes the connection and keeps the circuit numbering up to date.

3

Fill in the properties

Poles, current rating, cable type or water resistance are set per symbol. The manual explains more.

Try it yourself

Draw your single-line diagram with these symbols

Draw for free in your browser, without installation. You only pay when you want to print the plan without restrictions.

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Frequently asked questions

Questions about single-line diagram symbols

Which symbols are used in a single-line diagram?

A single-line diagram shows every circuit from the distribution board to the last appliance: the protection (circuit breaker, RCD or fuse), the cable and the connected components such as sockets, switches, light points and appliances. This page lists every symbol you can use for that in 1wire.

Do these symbols comply with the AREI?

1wire draws the symbols the way they are used in Belgian single-line diagrams under the AREI, the Belgian electrical regulations. A diagram is only complete when the properties are right as well: number of poles, current rating, cable type and cross-section. You fill these in per symbol in 1wire.

What is the difference between a two-way switch and an intermediate switch?

With two two-way switches you control one light point from two places, for example at the top and bottom of a staircase. To control it from three or more places, you put one or more intermediate switches between the two two-way switches. With many control points, an impulse switch with push buttons is often simpler.

What is the difference between a circuit breaker and an RCD?

A circuit breaker protects a circuit against overload and short circuits. A differential switch (RCD) protects against leakage currents to earth, and so against electric shock. On the single-line diagram you draw them separately, each with its own properties such as current rating, sensitivity (for example 30 mA or 300 mA) and type.

How do I find a symbol in 1wire?

Type its name in the search field of the symbol library. Just like on this page, 1wire recognises synonyms too. Click the symbol and place it on your diagram.

What if the symbol I need is missing?

Use the general appliance symbol and write its name next to it. Please also tell us which symbol you are missing through the contact form, so we can look into adding it.

Do I also need a floor plan next to the single-line diagram?

Yes. For the inspection of a residential installation, the single-line diagram comes with a floor plan that shows where each component is. In 1wire you place the components of your single-line diagram directly on the floor plan.