{"schemaVersion":1,"slug":"emergency-lighting-common-failure-interface","name":"Emergency-lighting common-failure interface","kind":"symbol","abbreviation":"ECI","aliases":["Switchroom lighting and access interfaces","switchrooms Switchroom lighting and access interfaces","switchrooms","Switchrooms","Lighting monitoring fault","Room lighting-failure alarm"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Receives the defined failure indication from the assigned emergency-lighting monitoring system.","description":["Receives the defined failure indication from the assigned emergency-lighting monitoring system. Lighting and access interfaces coordinate the electrical-room service circuits and their supervision. Normal lighting, emergency illumination and access indication have different power sources and purposes.","In a switchroom, a normal lighting branch may be switched locally while the specified emergency luminaires remain connected to their own backed-up or integral supply. For this reference, the drawing identifies “Lighting monitoring fault” at the input and “Room lighting-failure alarm” at the output. The monitored scope must identify the affected fittings.","Identify the lighting supply type, controlled circuit and the meaning of any test or failure output. A drawing symbol does not establish illumination levels, emergency duration or an approved egress arrangement. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation."],"readingNotes":["Start at the named input: Lighting monitoring fault. Identify its source device or document and the state represented on the drawing.","Follow the named output: Room lighting-failure alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The monitored scope must identify the affected fittings.","Identify the lighting supply type, controlled circuit and the meaning of any test or failure output. A drawing symbol does not establish illumination levels, emergency duration or an approved egress arrangement."],"drawingChecklist":["Label the source and connection reference for lighting monitoring fault.","Identify the destination and defined state of room lighting-failure alarm.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The monitored scope must identify the affected fittings."],"distinction":"The monitored scope must identify the affected fittings. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.","facts":[{"label":"Representation","value":"Functional block"},{"label":"Installation focus","value":"Switchrooms"},{"label":"Input / boundary","value":"Lighting monitoring fault"},{"label":"Output / connection","value":"Room lighting-failure alarm"},{"label":"Lookup label","value":"ECI is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-room-services","relevance":"Public technical context for switchroom lighting and access interfaces. Lighting, emergency lighting, fire provisions and substation auxiliary services. Original cause-and-effect examples require project design. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["iec-maintained-emergency-luminaire","iec-exit-sign-luminaire","switchroom-maintained-lighting-control-interface"],"artwork":"pi26-emergency-lighting-common-failure-interface","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchrooms","family":"room-lighting","input":"Lighting monitoring fault","output":"Room lighting-failure alarm"},"plainEnglish":{"title":"What this block does","introduction":"Receives the defined failure indication from the assigned emergency-lighting monitoring system.","example":"In a switchroom, a normal lighting branch may be switched locally while the specified emergency luminaires remain connected to their own backed-up or integral supply. For this reference, the drawing identifies “Lighting monitoring fault” at the input and “Room lighting-failure alarm” at the output. The monitored scope must identify the affected fittings.","drawings":"Start at the named input: Lighting monitoring fault. Identify its source device or document and the state represented on the drawing. Follow the named output: Room lighting-failure alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Lighting monitoring fault"},{"name":"Output","meaning":"Room lighting-failure alarm"},{"name":"Application reference","meaning":"An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections."}],"diagram":"flow","steps":["Lighting monitoring fault","ECI","Room lighting-failure alarm"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Indoor substation: lighting, fire and auxiliary services","url":"https://www.electrical-installation.org/enwiki/Indoor_substation"}],"profileId":"power-installation-room-lighting"},"url":"https://eloragrid.ai/symbols/emergency-lighting-common-failure-interface","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/emergency-lighting-common-failure-interface.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-room-services","publisher":"Schneider Electric","title":"Indoor substation: lighting, fire and auxiliary services","url":"https://www.electrical-installation.org/enwiki/Indoor_substation","scope":"Lighting, emergency lighting, fire provisions and substation auxiliary services. Original cause-and-effect examples require project design.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for switchroom lighting and access interfaces. Lighting, emergency lighting, fire provisions and substation auxiliary services. Original cause-and-effect examples require project design. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}