# Non-maintained emergency luminaire plan mark

Canonical URL: https://eloragrid.ai/symbols/iec-non-maintained-emergency-luminaire
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: EM-NM
Drawing use: GA
Reference families: IEC

## Symbol convention

Convention: IEC
Form: Emergency luminaire, non-maintained
IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.

Plan mark for an emergency luminaire that lights only when the normal lighting supply fails.

## In plain English

### What does Non-maintained emergency luminaire plan mark mean?

Non-maintained emergency luminaires stay off while the normal supply is healthy and light from their internal battery on failure. Plans show the emergency luminaire mark with NM or with the legend distinguishing it from maintained fittings, typically along escape routes and at changes of direction.

### A simple example

The luminaire must monitor the local lighting circuit, so its permanent supply is taken from the same final circuit as the normal lighting in that area. The plan should make this relationship clear for the installer.

### What the drawings help you do

The symbol does not show whether the unit is self-contained or fed from a central battery. The legend or schedule states the system type.

### This particular reference

Plan mark for an emergency luminaire that lights only when the normal lighting supply fails. A maintained luminaire is lit continuously; this one only lights on failure.

### Terms

- 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/)
- [Electrical installation design methodology and references](https://www.electrical-installation.org/enwiki/General_rules_of_electrical_installation_design)


## What it represents

Non-maintained emergency luminaires stay off while the normal supply is healthy and light from their internal battery on failure. Plans show the emergency luminaire mark with NM or with the legend distinguishing it from maintained fittings, typically along escape routes and at changes of direction.
The luminaire must monitor the local lighting circuit, so its permanent supply is taken from the same final circuit as the normal lighting in that area. The plan should make this relationship clear for the installer.
The symbol does not show whether the unit is self-contained or fed from a central battery. The legend or schedule states the system type.

## How to read it

- Confirm the unit monitors the local lighting circuit.
- Check spacing along escape routes.

## Information to show or reference

- State duration and system type.
- Take permanent supply from local lighting circuit.
- Reference escape route plan.

## Important distinction

A maintained luminaire is lit continuously; this one only lights on failure.

## Facts

- Operation: Off normally, on during supply failure
- Placement: Escape routes and changes of direction
- 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 for installation plans; independently drawn here.
- [Electrical installation design methodology and references](https://www.electrical-installation.org/enwiki/General_rules_of_electrical_installation_design) — Schneider Electric — Electrical Installation Guide. Installation design methodology covering lighting circuits and final distribution.

## 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.