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

Symbols

Protective earth

Protective-earth identification indicates a connection serving the protective earthing function. It should be distinguished from functional earthing, signal references and other grounding conventions. The drawing context and applicable documentation establish the meaning of each connection.

Drawing use: SLD / Schematic
Application: Connections & wiring
Reference family: IEC / IEEE / ANSI

A distinction that matters

Protective earth, functional earth and a signal common are different functions even when a drawing uses visually related marks.

Full reference

Symbols

Earthing switch

An earthing-switch representation identifies a switching connection between an electrical circuit section and earth. This is a switching device, not merely an earth-reference mark. On an SLD, its location helps explain which part of the switchgear or circuit is connected to earth when the device operates.

Drawing use: SLD / Schematic
Application: Power distribution
Reference family: IEC / IEEE / ANSI

A distinction that matters

A protective-earth mark identifies a connection or function. An earthing switch identifies equipment that makes a switching connection.

Full reference

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