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

Direct neutral earthing connection

This representation shows a star point connected directly to an earth symbol. It marks a solidly earthed system, which gives high earth fault current and allows ordinary overcurrent devices to clear earth faults quickly. It is standard on most low voltage distribution systems and common on transmission networks.

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

A distinction that matters

A direct neutral earthing connection has no impedance; resistance earthing inserts a resistor to limit fault current.

Full reference

Y N

Symbols

Star winding with accessible neutral

An accessible-neutral star winding brings the common star point to a documented terminal. Earthing and neutral loading details are supplied separately by the system design.

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

A distinction that matters

An accessible neutral is not automatically a protective-earth conductor.

Full reference

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