Understand the difference.

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

MEN

IEC

Neutral-to-earth link

The neutral-to-earth link connects the neutral and earth bars at one point, normally the main switchboard. In Australian and New Zealand practice it is the MEN link, and in other TN-C-S schemes it is the point where the incoming PEN is split. It provides the low impedance path that lets earth faults operate overcurrent devices.

Drawing use

SLD / Schematic

Application

Connections & wiring

Reference family

IEC

Form evidence

Neutral to earth bonding link. Independent IEC-context illustration; not certified IEC geometry.

A distinction that matters

The neutral-to-earth link bonds N and PE in service; the earth test link is opened only to test the electrode.

Full referenceAdd to legend

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

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