{"schemaVersion":1,"slug":"flexible-bonding-strap","name":"Flexible bonding strap","kind":"symbol","abbreviation":"BS","aliases":["braided bonding strap","door earth strap","bonding braid"],"category":"connections-wiring","drawingTypes":["Schematic","GA"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A flexible braid or strap bonding a movable or vibrating metal part, such as a panel door, to the earthing system.","description":["A bonding strap connects metal parts that cannot be bonded with rigid conductors, such as hinged doors carrying equipment, gland plates, cable tray across expansion joints and equipment on anti-vibration mounts. Braided straps also provide low impedance at high frequency, which helps with EMC bonding in drive panels.","The symbol does not state cross-sectional area or length, both of which affect protective and high-frequency performance. A long thin strap may satisfy continuity tests but give poor EMC performance. Painted surfaces under strap lugs must be cleaned for a reliable connection."],"readingNotes":["Check strap size against the protective conductor rule.","Look for EMC bonding requirements in drive panels."],"drawingChecklist":["State strap cross-section and length.","Show both bonding points.","Specify paint removal at lugs."],"distinction":"A bonding strap is a flexible protective or EMC bond; a flexible conductor is a circuit conductor that must flex in service.","facts":[{"label":"Graphic cue","value":"Wavy or braided link between a part and earth"},{"label":"Typical use","value":"Panel doors, gland plates and tray expansion joints"},{"label":"Preview","value":"Original educational illustration; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"s28-eig-earthing-connections","relevance":"Public installation-guide earthing and equipotential connection elements."},{"sourceId":"pub-symbol-earthing-surge","relevance":"Public IEC-oriented bonding forms."}],"related":["protective-equipotential-bonding","flexible-conductor","iec-frame-or-chassis-connection"],"artwork":"s28-flexible-bonding-strap","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","plainEnglish":{"title":"What does Flexible bonding strap mean?","introduction":"A bonding strap connects metal parts that cannot be bonded with rigid conductors, such as hinged doors carrying equipment, gland plates, cable tray across expansion joints and equipment on anti-vibration mounts. Braided straps also provide low impedance at high frequency, which helps with EMC bonding in drive panels.","example":"The symbol does not state cross-sectional area or length, both of which affect protective and high-frequency performance. A long thin strap may satisfy continuity tests but give poor EMC performance. Painted surfaces under strap lugs must be cleaned for a reliable connection.","drawings":"Check strap size against the protective conductor rule. Look for EMC bonding requirements in drive panels. A bonding strap is a flexible protective or EMC bond; a flexible conductor is a circuit conductor that must flex in service.","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":"Earthing connections","url":"https://www.electrical-installation.org/enwiki/Earthing_connections"},{"label":"AutoCAD Electrical: Earthing, sources and surge protection","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1E3FDEAE-B4B2-417C-8075-108AA2C6E509.htm"}],"detail":"A flexible braid or strap bonding a movable or vibrating metal part, such as a panel door, to the earthing system. A bonding strap is a flexible protective or EMC bond; a flexible conductor is a circuit conductor that must flex in service.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/flexible-bonding-strap","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/flexible-bonding-strap.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"s28-eig-earthing-connections","title":"Earthing connections","publisher":"Schneider Electric, Electrical Installation Guide","url":"https://www.electrical-installation.org/enwiki/Earthing_connections","type":"manufacturer","scope":"Definitions of earth electrode, main earthing terminal, removable test link and bonding conductors in an installation earthing arrangement.","checkedOn":"2026-10-28","reuse":"link-only","relevance":"Public installation-guide earthing and equipotential connection elements."},{"id":"pub-symbol-earthing-surge","title":"AutoCAD Electrical: Earthing, sources and surge protection","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1E3FDEAE-B4B2-417C-8075-108AA2C6E509.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 IEC-oriented bonding forms."}]}