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

NRMI

Symbols

Neutral-earthing resistor measurement interface

Identifies the measurement connection associated with the selected neutral-earthing resistor system. Earthing and lightning interfaces identify the connections between equipment metalwork, primary protection devices and the station earthing network. Their electrical purpose differs from their physical conductor route or electrode geometry.

Drawing use: Schematic
Application: Power distribution
Reference family: Manufacturer

A distinction that matters

Resistance and thermal duty follow the earthing design. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.

Full reference

IEC

Earth electrode

The earth electrode symbol marks a rod, plate, tape or foundation electrode that makes contact with the general mass of the earth. It appears on earthing diagrams and site layouts, often numbered so that individual electrodes can be tested and recorded.

Drawing use: SLD / GA
Application: Connections & wiring
Reference family: IEC
Form evidence: Earth electrode. Independent IEC-context illustration; not certified IEC geometry.

A distinction that matters

An earth electrode is the physical contact with soil; an earth connection symbol is any connection to the earthing system.

Full reference

Follow the full entry for source drawings and the appropriate standard or selected product. Equipment previews show a manufacturer drawing where available, otherwise a 3D thumbnail.