{"schemaVersion":1,"slug":"ansi-functional-equipotential-bonding","name":"ANSI/IEEE functional equipotential bonding symbol","kind":"symbol","abbreviation":"-","aliases":["IEEE functional bond","ANSI signal bonding","functional bonding conductor"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented functional equipotential bond used to keep equipment at a common reference for operation or noise control.","description":["A functional equipotential bond ties equipment together for operational reasons, such as keeping communications equipment at a common reference or reducing high-frequency noise. The publisher's IEEE miscellaneous preview lists a functional equipotential bond form, the counterpart of the existing IEC concept page.","This illustration is an independent explanation and not the IEEE graphic. A functional bond does not satisfy protective bonding requirements unless it is also sized and installed as a protective conductor. Drawings should not use the functional form where a safety bond is intended."],"readingNotes":["Do not treat a functional bond as a protective one.","Check high-frequency bonding requirements for drives and comms."],"drawingChecklist":["State the reason for the functional bond.","Size it separately from protective bonds.","Label bonded equipment."],"distinction":"A functional bond supports operation; a protective bond provides safety during faults.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview: Miscellaneous (Functional Equipotential Bond)"},{"label":"Public vendor block name","value":"HGND1 (Autodesk identifier; not an IEEE symbol number)"},{"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":"ansi-autodesk-34282bfd-7b8e-48f3-a6ed-93adbdddfbd3","relevance":"Exact public IEEE-oriented category page listing the functional equipotential bond form."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["functional-equipotential-bonding","ansi-protective-equipotential-bonding","ansi-functional-earth"],"artwork":"s28-ansi-functional-equipotential-bonding","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented functional equipotential bond form","reference":"Autodesk publishes this block under IEEE Symbol Preview: Miscellaneous. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.","counterpart":"functional-equipotential-bonding"},"plainEnglish":{"title":"What does ANSI/IEEE functional equipotential bonding mean?","introduction":"A functional equipotential bond ties equipment together for operational reasons, such as keeping communications equipment at a common reference or reducing high-frequency noise. The publisher's IEEE miscellaneous preview lists a functional equipotential bond form, the counterpart of the existing IEC concept page.","example":"This illustration is an independent explanation and not the IEEE graphic. A functional bond does not satisfy protective bonding requirements unless it is also sized and installed as a protective conductor. Drawings should not use the functional form where a safety bond is intended.","drawings":"Do not treat a functional bond as a protective one. Check high-frequency bonding requirements for drives and comms. A functional bond supports operation; a protective bond provides safety during faults.","terms":[{"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":"Autodesk IEEE Symbol Preview — Miscellaneous","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-34282BFD-7B8E-48F3-A6ED-93ADBDDDFBD3.htm"},{"label":"IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams","url":"https://standards.ieee.org/ieee/315/515/"}],"detail":"IEEE-oriented functional equipotential bond used to keep equipment at a common reference for operation or noise control. A functional bond supports operation; a protective bond provides safety during faults.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/ansi-functional-equipotential-bonding","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ansi-functional-equipotential-bonding.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"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":"Exact public IEEE-oriented category page listing the functional equipotential bond form."},{"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."}]}