{"schemaVersion":1,"slug":"motor-overload-trip-nc-contact","name":"Motor overload trip NC contact","kind":"symbol","abbreviation":"OL NC","aliases":["HOL22","VOL22"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An overload trip NC contact opens on the documented overload relay operation.","description":["An overload trip NC contact opens on the documented overload relay operation. It is commonly wired in the motor-control path while the overload sensing elements belong to the power circuit."],"readingNotes":["Use the overload device tag to link sensing and control-contact representations.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify overload relay","State contact terminals","Show reset and trip logic"],"distinction":"The auxiliary overload contact interrupts a control path; it does not itself carry the motor feeder current.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HOL22, VOL22 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-motor-control","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-motor-overload-trip-nc-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/motor-overload-trip-nc-contact","illustration":{"url":"https://eloragrid.ai/library/illustrations/motor-overload-trip-nc-contact.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-symbol-motor-control","title":"AutoCAD Electrical: Motor control and overloads","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-D74101D4-8702-418C-B349-B15EEAEFAA20.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}]}