{"schemaVersion":1,"slug":"iec-t-connection-without-dot","name":"T-connection without junction dot","kind":"symbol","abbreviation":"-","aliases":["plain tee junction","T-junction","undotted tee connection"],"category":"connections-wiring","drawingTypes":["Schematic","SLD"],"referenceFamilies":["IEC"],"summary":"A conductor meeting another at a right angle and stopping there, which IEC practice reads as a connection even without a dot.","description":["In IEC drawing practice a conductor that runs into another and ends there forms a T-connection, and the connection is understood whether or not a dot is drawn. Many drafting standards still recommend the dot for clarity, but undotted tees are common on legacy and vendor drawings.","The convention depends on the drawing family. On some ANSI-style drawings an undotted tee may be ambiguous, which is why a dot is preferred there. Readers should check the drawing legend. A T-connection only shows electrical continuity; it does not tell you where the physical joint is, which may be at a terminal some distance away."],"readingNotes":["Check the legend to see whether undotted tees are used as connections.","Find the physical terminal or joint that realises the tee."],"drawingChecklist":["Apply one tee convention consistently across the set.","Prefer a dot where drawings may be read under other conventions.","Avoid four-way crossings that rely on dots alone."],"distinction":"An undotted tee is a connection; a plain four-way crossing without a dot is normally read as no connection.","facts":[{"label":"Graphic cue","value":"Conductor ending perpendicular on another without a dot"},{"label":"Reading rule","value":"Connected under IEC practice; check legend for other conventions"},{"label":"Preview","value":"Original educational illustration; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-wire-connections","relevance":"Public guidance on connection dots, crossing gaps and loops."},{"sourceId":"autodesk-index","relevance":"Public directory of IEC-oriented symbol families."}],"related":["iec-conductor-connection-junction","iec-double-junction","ansi-conductor-junction"],"artwork":"s28-iec-t-connection-without-dot","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Undotted T-connection","reference":"Independent IEC-context illustration of a drafting convention; not certified IEC geometry."},"plainEnglish":{"title":"What does T-connection without junction dot mean?","introduction":"In IEC drawing practice a conductor that runs into another and ends there forms a T-connection, and the connection is understood whether or not a dot is drawn. Many drafting standards still recommend the dot for clarity, but undotted tees are common on legacy and vendor drawings.","example":"The convention depends on the drawing family. On some ANSI-style drawings an undotted tee may be ambiguous, which is why a dot is preferred there. Readers should check the drawing legend. A T-connection only shows electrical continuity; it does not tell you where the physical joint is, which may be at a terminal some distance away.","drawings":"Check the legend to see whether undotted tees are used as connections. Find the physical terminal or joint that realises the tee. An undotted tee is a connection; a plain four-way crossing without a dot is normally read as no connection.","terms":[{"name":"Terminal","meaning":"An identified point where a conductor connects."},{"name":"Schematic","meaning":"A drawing showing function and connections rather than physical appearance."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"Wire connection dots, crossing gaps and loops","url":"https://help.autodesk.com/cloudhelp/2020/ENU/AutoCAD-Electrical/files/GUID-936BB8A9-9C01-4AC6-B833-CB97700A7203.htm"},{"label":"IEC-60617 symbol preview directory","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7871E6EF-24D5-467E-9B74-321FEDC9DFDA.htm"}],"detail":"A conductor meeting another at a right angle and stopping there, which IEC practice reads as a connection even without a dot. An undotted tee is a connection; a plain four-way crossing without a dot is normally read as no connection.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/iec-t-connection-without-dot","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/iec-t-connection-without-dot.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"iec-public-wire-connections","title":"Wire connection dots, crossing gaps and loops","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2020/ENU/AutoCAD-Electrical/files/GUID-936BB8A9-9C01-4AC6-B833-CB97700A7203.htm","type":"cad-reference","scope":"Public drafting-tool documentation. The annotation is a connectivity or identification convention, not a verified IEC standard graphic.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Public guidance on connection dots, crossing gaps and loops."},{"id":"autodesk-index","title":"IEC-60617 symbol preview directory","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7871E6EF-24D5-467E-9B74-321FEDC9DFDA.htm","type":"cad-reference","scope":"Public reference directory of named symbol categories. Vendor graphics and CAD library files are not redistributed here.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public directory of IEC-oriented symbol families."}]}