Terminal
Terminal connection
An identified electrical connection point linking schematic and wiring information.
Schematic
IEC · HT0_TW
Twisted-pair indication
A twisted-pair indication identifies the documented association of two conductors as a twisted pair.
IEC · Twisted-pair indication
Autodesk IEC-60617 Symbol Preview — Cable identification and twisted-pair annotation; vendor family reference, not certified IEC geometry or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · HT0_TW
What it represents
A twisted-pair indication identifies the documented association of two conductors as a twisted pair. The pair association matters to conductor identification and termination, even when the two wires are drawn apart elsewhere. It does not by itself describe the cable screen or its termination.
Preserve pair numbers and polarity through connector and terminal schedules. If a screen is required, draw and document that interface separately.
How to read it
- Record pair identity and the actual conductor mapping separately.
- Twisting and shielding are different cable attributes; a twist indication does not prove a screen is present.
Information to show or reference
- Identify the associated device, circuit or diagram boundary.
- Record pair identity and the actual conductor mapping separately.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.
A distinction that matters
Twisting and shielding are different cable attributes; a twist indication does not prove a screen is present.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEC-60617 preview: Cable identification and twisted-pair annotation
Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content.
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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