E
Earth electrode
A conductor in contact with the ground, such as a driven rod, providing the installation's connection to earth.
IEC
Symbols · EG
Earth grid conductor
A buried horizontal earthing conductor forming part of a substation or plant earth grid, drawn on layout plans.
In plain English
What does Earth grid conductor mean?
Earth grid conductors are bare horizontal conductors buried under substations and plant areas to control step and touch voltages during faults. Layout drawings show them as a distinct line style, with crossings, connections to equipment and rods marked along them.
A simple example
The symbol does not show conductor size, burial depth or jointing method, which come from the earthing design. A line drawn on a plan may also not indicate whether crossings are bonded; connection marks at each crossing are needed. Above-ground risers to equipment are usually shown separately.
What the drawings help you do
Check crossings for bond marks. Look for risers to each equipment item. An earth grid conductor is a buried horizontal conductor; an earth electrode is a rod or plate in the soil.
This particular reference
A buried horizontal earthing conductor forming part of a substation or plant earth grid, drawn on layout plans. An earth grid conductor is a buried horizontal conductor; an earth electrode is a rod or plate in the soil.
- Terminal
- An identified point where a conductor connects.
- Rating
- A value stating the conditions for which equipment is specified.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: Earthing connections · Electrical installation design methodology and references
GA · EG
What it represents
Earth grid conductors are bare horizontal conductors buried under substations and plant areas to control step and touch voltages during faults. Layout drawings show them as a distinct line style, with crossings, connections to equipment and rods marked along them.
The symbol does not show conductor size, burial depth or jointing method, which come from the earthing design. A line drawn on a plan may also not indicate whether crossings are bonded; connection marks at each crossing are needed. Above-ground risers to equipment are usually shown separately.
How to read it
- Check crossings for bond marks.
- Look for risers to each equipment item.
Information to show or reference
- State conductor size and burial depth.
- Mark bonded crossings.
- Show risers to equipment.
A distinction that matters
An earth grid conductor is a buried horizontal conductor; an earth electrode is a rod or plate in the soil.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Earthing connections
Public installation-guide earthing connection elements.
Electrical installation design methodology and references
Installation design methodology references.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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