Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

IEC

Luminaire general plan symbol

On IEC-style lighting plans a crossed circle marks the position of a luminaire or a lighting outlet. It is the base form that other luminaire symbols modify: lines are added for linear fittings, arrows for spotlights and letters for emergency or special types.

Drawing use: GA
Application: Installation & communications
Reference family: IEC
Form evidence: Luminaire, general. IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.

A distinction that matters

The indicator lamp in control schematics uses a similar graphic but signals equipment state; the plan symbol locates a room luminaire.

Full reference

Lamp

Symbols

Indicator lamp

An indicator lamp shows an operating condition defined by its circuit and label. The generic representation identifies an indicating element; it does not define what illumination means, the supply voltage or whether the device is continuously lit or flashing.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / IEEE / ANSI

A distinction that matters

An indication mark does not establish that equipment is safe, isolated or de-energised. Its meaning comes from the full circuit and operating documentation.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.