U UL 924 STANDARD FOR SAFETY Emergency Lighting and Power Equipment FEBRUARY 12, 2025 -UL924 tr1 Tenth Edition, Dated May 9, 2016 Summaryof Topics This revision ofANSI/UL924 dated February 12,2025 includes the following changes: - Scope updates; 1.1 - Direct current output; 74.1A and 76.7 - Additional battery options; 22.2.1 ELCF Test; 47.5 - Battery discharge test; 48.1, 48.3, 48.3A, and 48.6 - Temperature test; 52.11.1 - Emergency equipment with AC and DC input ratings; 73A.2.1 Emergency battery pack replacement marking; 73A.4.15 - Instructions for directly controlled emergency luminaires; 74.11, 74.12, and B1 - Editorial updates; 11.1, 22.2.1, 22.2.2, and 48B.1 -Area of Refuge Signs; Supplement SH FunctionalSafetyEvaluations;23.1,23.3,andAppendixA Text that has been changed in any manner or impacted by ULSE's electronic publishing system is marked with a vertical line in the margin. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated September 6, 2024 and December 6, 2024. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of ULSE Inc. (ULSE). but not limited to, the implied warranties of merchantability or fitness for any purpose. In no event will ULSE be liable for any special, incidental, consequential, indirect or similar damages, including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or the inabilitytousethisStandard,evenifULSEoranauthorizedULSErepresentativehasbeenadvisedofthe this Standard, regardless of the form of the claim. FEBRUARY 12, 2025 - UL924 t2 Users of the electronic versions of UL's Standards for Safety agree to defend, indemnify, and hold ULSE harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorney's fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchaser's computer system. ANSI MAY9,2016 (Title Page Reprinted: February 12, 2025) 1 ANSI/UL924-2025 1 UL 924 Standard for Emergency Lighting and Power Equipment First Edition - December, 1958 Second Edition - May, 1973 Third Edition - October, 1973 Fourth Edition - April, 1977 Fifth Edition -February,1979 Sixth Edition - March, 1984 Seventh Edition - November, 1990 Eighth Edition - March, 1995 Ninth Edition - February, 2006 Tenth Edition May 9, 2016 This ANSI/UL Standard for Safety consists of the Tenth Edition including revisions I through February 12, 2025. The most recent designation of ANSI/UL 924 as an American National Standard I (ANSl) occurred on February 12, 2025. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title Page. The Department of Defense (DoD) has adopted UL 924 on November 14, 1982. invalidate the DoD adoption. submitted to ULSE at any time. Proposals should be submitted via a Proposal Request in the Collaborative Standards Development System (CsDS) at https://csds.ul.com. Our Standards for Safety are copyrighted by ULSE Inc. Neither a printed nor electronic copy of a Standard should be altered in any way. All of our Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of ULSE Inc. 1 @ 2025 ULSE Inc. All rights reserved. ANSI MAY9,2016 (Title Page Reprinted: February 12, 2025) 1 ANSI/UL924-2025 1 UL 924 Standard for Emergency Lighting and Power Equipment First Edition - December, 1958 Second Edition - May, 1973 Third Edition - October, 1973 Fourth Edition - April, 1977 Fifth Edition -February,1979 Sixth Edition - March, 1984 Seventh Edition - November, 1990 Eighth Edition - March, 1995 Ninth Edition - February, 2006 Tenth Edition May 9, 2016 This ANSI/UL Standard for Safety consists of the Tenth Edition including revisions I through February