{"schemaVersion":1,"slug":"point-of-common-coupling","name":"Point of common coupling","kind":"symbol","abbreviation":"PCC","aliases":["PCC","point of connection","network connection point marker"],"category":"microgrid-systems","drawingTypes":["SLD"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A marker on a single-line diagram identifying where a customer installation or microgrid meets the public network.","description":["The point of common coupling is the location on the network nearest to the installation where other customers are, or could be, connected. Harmonic, flicker and voltage limits in connection agreements are assessed at this point, and microgrid islanding decisions are often defined relative to it.","Drawings mark the point with a dot, circle, flag or label PCC on the busbar or cable, often together with the ownership boundary and the revenue meter. A microgrid may show both a PCC with the utility and internal points of connection for each source.","The marker carries no electrical function itself. It does not tell you the ownership boundary, which can differ from the PCC, or the fault level at that point, which must be stated for compliance assessments."],"readingNotes":["Do not assume the PCC and the ownership boundary coincide.","Power quality limits are assessed here."],"drawingChecklist":["State voltage level and fault level at the PCC.","Show the ownership boundary separately.","Reference connection agreement limits."],"distinction":"A PCC marks an assessment point; a utility grid connection symbol represents the supply itself.","facts":[{"label":"Electrical function","value":"None, a reference marker"},{"label":"Used for","value":"Power quality and connection limits"},{"label":"Preview","value":"Independent educational illustration; exact standard graphic not certified"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public electrical installation design references covering supply connection."},{"sourceId":"s28-deif-hybrid-microgrid","relevance":"Public microgrid context with mains import and export at the connection point."}],"related":["utility-grid-connection","microgrid-interconnection-switch","busbar"],"artwork":"s28-point-of-common-coupling","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","plainEnglish":{"title":"What does Point of common coupling mean?","introduction":"The point of common coupling is the location on the network nearest to the installation where other customers are, or could be, connected. Harmonic, flicker and voltage limits in connection agreements are assessed at this point, and microgrid islanding decisions are often defined relative to it.","example":"Drawings mark the point with a dot, circle, flag or label PCC on the busbar or cable, often together with the ownership boundary and the revenue meter. A microgrid may show both a PCC with the utility and internal points of connection for each source.","drawings":"The marker carries no electrical function itself. It does not tell you the ownership boundary, which can differ from the PCC, or the fault level at that point, which must be stated for compliance assessments.","terms":[{"name":"Normally open / normally closed","meaning":"The contact state in the normal condition defined for the drawing."},{"name":"Terminal","meaning":"An identified point where a conductor connects."},{"name":"Rating","meaning":"A value stating the conditions for which equipment is specified."}],"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":"Electrical installation design methodology and references","url":"https://www.electrical-installation.org/enwiki/General_rules_of_electrical_installation_design"},{"label":"Reliable hybrid power and microgrid solutions","url":"https://www.deif.com/applications/power-generation/reliable-hybrid-power-and-microgrid-solutions/"}],"detail":"A marker on a single-line diagram identifying where a customer installation or microgrid meets the public network. A PCC marks an assessment point; a utility grid connection symbol represents the supply itself.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/point-of-common-coupling","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/point-of-common-coupling.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-object-engineering-design","title":"Electrical installation design methodology and references","publisher":"Schneider Electric — Electrical Installation Guide","url":"https://www.electrical-installation.org/enwiki/General_rules_of_electrical_installation_design","type":"manufacturer","scope":"Public design context. No universal working clearance, equipment dimension or project compliance conclusion is asserted.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public electrical installation design references covering supply connection."},{"id":"s28-deif-hybrid-microgrid","title":"Reliable hybrid power and microgrid solutions","publisher":"DEIF","url":"https://www.deif.com/applications/power-generation/reliable-hybrid-power-and-microgrid-solutions/","type":"manufacturer","scope":"Public hybrid and microgrid control context combining gensets, PV, storage and mains.","checkedOn":"2026-10-28","reuse":"link-only","relevance":"Public microgrid context with mains import and export at the connection point."}]}