E
Earth electrode
A conductor in contact with the ground, such as a driven rod, providing the installation's connection to earth.
IEC
Symbols · E
Earth electrode with inspection pit
An earth electrode drawn inside a pit outline, showing that its top and connection are accessible for inspection and testing.
In plain English
What does Earth electrode with inspection pit mean?
Many earthing designs place the top of each rod in an inspection pit so the connection can be examined and the electrode disconnected for testing. Layout drawings show the electrode inside a small square or circle representing the pit, often with an electrode number.
A simple example
The symbol does not tell you whether the pit includes a test link or whether the connection is welded or clamped. A pit is also a trip and traffic hazard, so its location should be coordinated with civil drawings. The pit cover rating matters where vehicles pass.
What the drawings help you do
Check pit locations against traffic areas. Find whether a test link is in the pit. An electrode with an inspection pit is accessible; a plain earth electrode symbol may be buried with no access.
This particular reference
An earth electrode drawn inside a pit outline, showing that its top and connection are accessible for inspection and testing. An electrode with an inspection pit is accessible; a plain earth electrode symbol may be buried with no access.
- 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 · AutoCAD Electrical: Earthing, sources and surge protection
GA / SLD · E
What it represents
Many earthing designs place the top of each rod in an inspection pit so the connection can be examined and the electrode disconnected for testing. Layout drawings show the electrode inside a small square or circle representing the pit, often with an electrode number.
The symbol does not tell you whether the pit includes a test link or whether the connection is welded or clamped. A pit is also a trip and traffic hazard, so its location should be coordinated with civil drawings. The pit cover rating matters where vehicles pass.
How to read it
- Check pit locations against traffic areas.
- Find whether a test link is in the pit.
Information to show or reference
- Number each pit electrode.
- State pit cover rating.
- Coordinate pit locations with civil works.
A distinction that matters
An electrode with an inspection pit is accessible; a plain earth electrode symbol may be buried with no access.
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.
AutoCAD Electrical: Earthing, sources and surge protection
Public IEC-oriented earth forms.
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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