This document (EN 50172:2024) has been prepared by CLC/TC 34” Lighting”.
 
The following dates are fixed:
• latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2025-05-27 
• latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2027-05-27
 
This document supersedes EN 50172:2004 and all of its amendments and corrigenda (if any).
EN 50172:2024 includes the following significant technical changes with respect to EN 50172:2004:
Requirements for emergency escape lighting equipment have been added
Requirements for the initial verification have been added
Requirements for the handover documentation have been added
Requirements to the logbook have been added
Requirements to maintenance and verification of emergency escape lighting systems have been modified
Guidance for the selection of appropriate system durations and activation times for various use cases have been added as Annex A
Recommendations how the onsite measurement should be carried out have been added as Annex B
 Considerations for emergency lighting systems during and after a premises lockdown or prolonged periods where power is disconnected have been added as Annex C
 Requirements how the system wiring should be carried out have been added as Annex D
 
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document is read in conjunction with EN 1838.