{"schemaVersion":1,"slug":"iec-conductor-interchange","name":"Interchange of conductors","kind":"symbol","abbreviation":"X","aliases":["phase transposition","conductor crossover","phase rotation change"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC"],"summary":"A crossing mark showing that two or more conductors swap position, such as a phase transposition or deliberate phase swap.","description":["The interchange form shows conductors crossing over so that their positions change along the run. On transmission lines it represents transposition, used to balance phase impedances. On motor and generator circuits it may show a deliberate swap of two phases to reverse rotation or to correct phase sequence.","The symbol must be read with the phase labels on both sides, because the purpose differs. An unlabelled crossing may be mistaken for a drafting artefact. Where the interchange changes phase sequence, any synchronising or phase-sequence-sensitive equipment downstream must be checked."],"readingNotes":["Read phase labels either side of the interchange.","Check whether rotation or phase sequence downstream depends on it."],"drawingChecklist":["Label phases on both sides of the interchange.","State the reason for the swap where it changes rotation.","Check synchronising and metering connections downstream."],"distinction":"Interchanged conductors change position or phase; an unconnected crossing just passes over another conductor with no change.","facts":[{"label":"Graphic cue","value":"Two conductor lines crossing to swap positions"},{"label":"Typical use","value":"Line transposition and rotation reversal"},{"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 wire crossings and connection display in drawings."},{"sourceId":"autodesk-index","relevance":"Public directory of IEC-oriented symbol families."}],"related":["iec-unconnected-conductor-crossing","iec-three-phase-conductor-group","25-synchronism-check"],"artwork":"s28-iec-conductor-interchange","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Conductor interchange form","reference":"Independent IEC-context illustration; not certified IEC geometry."},"plainEnglish":{"title":"What does Interchange of conductors mean?","introduction":"The interchange form shows conductors crossing over so that their positions change along the run. On transmission lines it represents transposition, used to balance phase impedances. On motor and generator circuits it may show a deliberate swap of two phases to reverse rotation or to correct phase sequence.","example":"The symbol must be read with the phase labels on both sides, because the purpose differs. An unlabelled crossing may be mistaken for a drafting artefact. Where the interchange changes phase sequence, any synchronising or phase-sequence-sensitive equipment downstream must be checked.","drawings":"Read phase labels either side of the interchange. Check whether rotation or phase sequence downstream depends on it. Interchanged conductors change position or phase; an unconnected crossing just passes over another conductor with no change.","terms":[{"name":"Phase","meaning":"One of the related AC waveforms in a power system."},{"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 crossing mark showing that two or more conductors swap position, such as a phase transposition or deliberate phase swap. Interchanged conductors change position or phase; an unconnected crossing just passes over another conductor with no change.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/iec-conductor-interchange","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/iec-conductor-interchange.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 wire crossings and connection display in drawings."},{"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."}]}