Understand the difference.

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

3/N/PE

IEC

Three-phase circuit with neutral and PE marking

Single-line diagrams often state the conductor complement of a circuit with a short notation beside the line, for example 3/N/PE 400/230 V 50 Hz. This tells the reader at a glance that the circuit has three phases, a neutral and a separate protective conductor, which is the normal TN-S final distribution arrangement.

Drawing use

SLD

Application

Connections & wiring

Reference family

IEC

Form evidence

Conductor complement notation on a single line. Independent IEC-context illustration; not certified IEC geometry.

A distinction that matters

The 3/N/PE notation states a whole conductor complement; individual N, PE or PEN marks identify one conductor on a stroke.

Full referenceAdd to legend

N

IEC

Neutral conductor mark

When a single line represents a group of conductors, one of them can be identified as the neutral with a distinct mark on its stroke, together with the letter N where clarity requires. This lets a single-line diagram tell a three-phase three-wire feeder from a three-phase four-wire feeder without expanding to multi-line form.

Drawing use

SLD / Schematic

Application

Connections & wiring

Reference family

IEC

Form evidence

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

A distinction that matters

A neutral mark identifies the N conductor; a PEN mark identifies a combined neutral and protective conductor with different switching rules.

Full referenceAdd to legend

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