{"schemaVersion":1,"slug":"ansi-chassis-ground","name":"ANSI/IEEE chassis ground symbol","kind":"symbol","abbreviation":"-","aliases":["IEEE chassis ground","frame ground","ANSI chassis connection"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"IEEE-oriented chassis or frame ground drawn as a line ending in angled strokes, used for equipment frame returns.","description":["US-practice electronics and control schematics show chassis ground as a line ending in a horizontal bar with angled strokes beneath it. It identifies a connection to the equipment frame and is often used for screen terminations and filter returns inside an enclosure.","This illustration is an independent explanation, not the IEEE graphic. As with the IEC frame connection, chassis ground is not proof that the frame is connected to earth ground. Safety grounding should be shown with the protective ground symbol."],"readingNotes":["Do not treat chassis ground as earth ground without a separate bond.","Look for screen terminations on chassis grounds."],"drawingChecklist":["Show the bond between chassis and earth ground.","Keep chassis and signal commons distinct.","Identify chassis stud locations."],"distinction":"Chassis ground ties to the frame; earth ground ties to the grounding electrode system.","facts":[{"label":"Convention evidence","value":"IEEE 315 graphic conventions for chassis or frame connection (standards context only)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics; IEEE lists this edition as Inactive-Reserved."},{"label":"Preview","value":"Original educational illustration; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."},{"sourceId":"ansi-autodesk-34282bfd-7b8e-48f3-a6ed-93adbdddfbd3","relevance":"Public IEEE-oriented earth and ground forms."}],"related":["iec-frame-or-chassis-connection","ansi-protective-earth","ansi-earth-connection"],"artwork":"s28-ansi-chassis-ground","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Chassis ground form","reference":"Independent illustration in IEEE drafting context; no equivalence of every detailed standard graphic is asserted."},"plainEnglish":{"title":"What does ANSI/IEEE chassis ground mean?","introduction":"US-practice electronics and control schematics show chassis ground as a line ending in a horizontal bar with angled strokes beneath it. It identifies a connection to the equipment frame and is often used for screen terminations and filter returns inside an enclosure.","example":"This illustration is an independent explanation, not the IEEE graphic. As with the IEC frame connection, chassis ground is not proof that the frame is connected to earth ground. Safety grounding should be shown with the protective ground symbol.","drawings":"Do not treat chassis ground as earth ground without a separate bond. Look for screen terminations on chassis grounds. Chassis ground ties to the frame; earth ground ties to the grounding electrode system.","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":"IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams","url":"https://standards.ieee.org/ieee/315/515/"},{"label":"Autodesk IEEE Symbol Preview — Miscellaneous","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-34282BFD-7B8E-48F3-A6ED-93ADBDDDFBD3.htm"}],"detail":"IEEE-oriented chassis or frame ground drawn as a line ending in angled strokes, used for equipment frame returns. Chassis ground ties to the frame; earth ground ties to the grounding electrode system.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/ansi-chassis-ground","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ansi-chassis-ground.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"ieee-315","title":"IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams","publisher":"IEEE Standards Association","url":"https://standards.ieee.org/ieee/315/515/","type":"standard","scope":"Graphic symbols and designation letters. IEEE lists this edition as Inactive-Reserved; it is a historical reference, not a claim of current compliance.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."},{"id":"ansi-autodesk-34282bfd-7b8e-48f3-a6ed-93adbdddfbd3","title":"Autodesk IEEE Symbol Preview — Miscellaneous","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-34282BFD-7B8E-48F3-A6ED-93ADBDDDFBD3.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. IEEE/ANSI 315-1975 is a historical graphics reference with Inactive-Reserved status; this page does not certify current standards compliance.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Public IEEE-oriented earth and ground forms."}]}