U UL 924 STANDARD FOR SAFETY Emergency Lighting and Power Equipment ULCOPYRIGHTEDMATERIAL-NOTAUTHORIZEDFORFURTHER REPRODUCTIONORDISTRIBUTIONWITHOUTPERMISSIONFROMULINC tr1 DECEMBER 14, 2022 - UL924 Tenth Edition, Dated May 9, 2016 Summary of Topics This revision of ANSI/UL 924 dated December 14, 2022 includes the following changes: • Scope Clarifications; 1.4, 1.5 · Definitions; 4.3, 4.19 · Mounting Means; 11.1, 11.2, Section 70A · Installation - wiring connections; 17.1.1 - 17.1.4, 17.2.1 - 17.2.3, 17.3.1, 17.3.2, Section 17.5, 19.4.4 · Batteries; 22.1- 22.2.3, 33.1, Section 48A, Section 48B, 52.11.1 · Electronic circuits subject to voltage surge testing; 23.2, 55.1, SE4.7.1 Overcurrent protection; 26.2 ·Definitions and detection thresholds for self-testing/self-diagnostic equipment; 4.52.1 4.52.2,30.1 · Maximum permitted time for ELCD operation; 47.2 : Temperature test for recessed equipment; 40.3, 52.10, 52.17, 73A.3.12 · Markings; 30.1.1, Sections 44, 71, 72, 73, 73A, 74.1, 74.2, 74.7 - 74.10, 76.6 • Low frequency inverter battery discharge compliance option; 78.2.1 ·ExpansionofAppendixBcontent · Emergency Systems; Appendix C · Editorial Corrections; 18.4.1, 20.2, 39.1.1, 43.5.1, 52.2, 52.11, Table SD2.1 and SE4.6.1 Text that has been changed in any manner or impacted by UL'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 October 21, 2022. 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 UL. UL provides this Standard "as is" without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or fitness for any purpose. In no event will UL 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 possibility of such damage. In no event shall UL's liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of UL's Standards for Safety agree to defend, indemnify, and hold UL harmlessfromandagainstanyloss,expense,liability,damage,claim,orjudgment(includingreasonable Standard on the purchaser's computer system. ULCOPYRIGHTEDMATERIAL-NOTAUTHORIZEDFORFURTHER REPRODUCTIONORDISTRIBUTIONWITHOUTPERMISSIONFROMULINC 2 DECEMBER14,2022-UL924 No Text on This Page ULCOPYRIGHTEDMATERIAL-NOTAUTHORIZEDFORFURTHER REPRODUCTIONORDISTRIBUTIONWITHOUTPERMISSIONFROMULINC ANSI MAY 9,2016 (Title Page Reprinted: December 14, 2022) 1 ANSI/UL 924-2022 1 UL 924 Standard for Emergency Lighting and Power Equipment The first, second, third, and fifth editions were titled Standard for Emergency Lighting 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 TenthEdition May 9, 2016 This ANSI/UL Standard for Safety consists of the Tenth Edition including revisions I through December 14, 2022. The most recent designation of ANSI/UL 924 as an American National Standard I (ANSl) occurred on December 14, 2022. 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. invalidatetheDoDadoption. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in UL's On-Line Collaborative Standards Development System (CSDS) athttps://csds.ul.com. copy of a Standard should be