Understand the difference.

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

PE

IEC

Protective conductor mark

This mark identifies the protective conductor within a group of conductors drawn as one line. It shows that the circuit carries its own PE conductor to the load, which is how the fault return path for automatic disconnection is provided in TN systems. The letters PE are often written beside the mark.

Drawing use

SLD / Schematic

Application

Connections & wiring

Reference family

IEC

Form evidence

Protective conductor identification on a conductor group. Independent IEC-context illustration; not certified IEC geometry.

A distinction that matters

The PE conductor mark identifies a conductor in a run; the protective earth symbol identifies a connection point to the earthing system.

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PE

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 referenceAdd to legend

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