{"schemaVersion":1,"slug":"switchroom-emergency-lighting-supply-interface","name":"Switchroom emergency-lighting supply interface","kind":"symbol","abbreviation":"SESI","aliases":["Switchroom lighting and access interfaces","switchrooms Switchroom lighting and access interfaces","switchrooms","Switchrooms","Emergency supply source","Emergency lighting circuit"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Marks the documented supply boundary serving the room's emergency lighting system.","description":["Marks the documented supply boundary serving the room's emergency lighting 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 “Emergency supply source” at the input and “Emergency lighting circuit” at the output. Supply type and autonomy follow the lighting design.","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: Emergency supply source. Identify its source device or document and the state represented on the drawing.","Follow the named output: Emergency lighting circuit. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Supply type and autonomy follow the lighting design.","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 emergency supply source.","Identify the destination and defined state of emergency lighting circuit.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Supply type and autonomy follow the lighting design."],"distinction":"Supply type and autonomy follow the lighting design. 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":"Emergency supply source"},{"label":"Output / connection","value":"Emergency lighting circuit"},{"label":"Lookup label","value":"SESI 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","central-battery-lighting-outgoing-branch"],"artwork":"pi26-switchroom-emergency-lighting-supply-interface","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchrooms","family":"room-lighting","input":"Emergency supply source","output":"Emergency lighting circuit"},"plainEnglish":{"title":"What this block does","introduction":"Marks the documented supply boundary serving the room's emergency lighting 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 “Emergency supply source” at the input and “Emergency lighting circuit” at the output. Supply type and autonomy follow the lighting design.","drawings":"Start at the named input: Emergency supply source. Identify its source device or document and the state represented on the drawing. Follow the named output: Emergency lighting circuit. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Emergency supply source"},{"name":"Output","meaning":"Emergency lighting circuit"},{"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":["Emergency supply source","SESI","Emergency lighting circuit"],"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/switchroom-emergency-lighting-supply-interface","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/switchroom-emergency-lighting-supply-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."}]}