# Switch with pilot light plan mark

Canonical URL: https://eloragrid.ai/symbols/iec-switch-with-pilot-light
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: SPL
Drawing use: GA
Reference families: IEC

## Symbol convention

Convention: IEC
Form: Switch with pilot lamp
IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.

Plan mark for a switch with an integral pilot lamp that shows when the controlled load is on.

## In plain English

### What does Switch with pilot light plan mark mean?

A switch with pilot light is used where the controlled load cannot be seen from the switch position, such as an external light, a water heater or a loft. The plan form adds a small lamp mark, a crossed circle, to the switch symbol.

### A simple example

The pilot lamp needs a neutral at the switch in many accessory designs, so the symbol tells the electrician to bring a neutral to the switch box. It may also signal a double-pole switch for appliance control.

### What the drawings help you do

The lamp mark does not tell you whether it lights when the load is on or when the switch is off as a locator. The specification decides.

### This particular reference

Plan mark for a switch with an integral pilot lamp that shows when the controlled load is on. A plain one-way switch has no lamp; this form adds visual confirmation of the load state.

### Terms

- Signal: Electrical information passed between devices, rather than necessarily the main power supply.
- Schematic: A drawing showing function and connections rather than physical appearance.

Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference
A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.

- [IEC graphical symbols for diagrams](https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/)
- [Pilot lights: public symbol reference](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-BBCEBBBA-24AD-4D3A-B106-39550AAACA6C.htm)


## What it represents

A switch with pilot light is used where the controlled load cannot be seen from the switch position, such as an external light, a water heater or a loft. The plan form adds a small lamp mark, a crossed circle, to the switch symbol.
The pilot lamp needs a neutral at the switch in many accessory designs, so the symbol tells the electrician to bring a neutral to the switch box. It may also signal a double-pole switch for appliance control.
The lamp mark does not tell you whether it lights when the load is on or when the switch is off as a locator. The specification decides.

## How to read it

- Check whether the lamp indicates load on or acts as a locator.
- Confirm a neutral is available at the switch.

## Information to show or reference

- State lamp function.
- State pole count.
- Tag the remote load.

## Important distinction

A plain one-way switch has no lamp; this form adds visual confirmation of the load state.

## Facts

- Added element: Integral indicator lamp
- Wiring note: Often needs a neutral at the switch
- Exact standard graphic: Not reproduced here; confirm the form against IEC 60617 and the project legend

## Public references

- [IEC graphical symbols for diagrams](https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/) — IEC. IEC graphical symbol context; independently drawn here.
- [Pilot lights: public symbol reference](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-BBCEBBBA-24AD-4D3A-B106-39550AAACA6C.htm) — Autodesk. Public lamp symbol family for comparing the indicator element.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.