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

LAMP TX

Symbols

Transformer-fed indicator lamp

A transformer-fed indicator lamp includes a documented internal voltage-conversion arrangement. Its supply terminals and lamp indication are shown according to the selected assembly.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / Manufacturer

A distinction that matters

A built-in lamp transformer is different from a separately drawn panel control transformer.

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.