Understand the difference.

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

PEN

IEC

PEN conductor mark

The PEN mark identifies one conductor that performs both the protective and neutral functions. It appears in TN-C and TN-C-S arrangements, typically between the supply transformer and the main switchboard, where the PEN is later separated into N and PE at a defined point.

Drawing use

SLD / Schematic

Application

Connections & wiring

Reference family

IEC

Form evidence

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

A distinction that matters

A PEN conductor combines N and PE functions; a neutral mark shows a conductor that has no protective role.

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.