These revisions were issued to incorporate the following:
• Editorial corrections and updates to references and editorial revisions to simplify, clarify, or consolidate requirements
• Revised definitions for automatic load control relay and central station battery lighting and power systems; new definition for floor proximity exit sign
• Simplification of and alternative requirements for enclosures
• Clarification that evidence must exist to support a performance characteristic claim for polymeric material
• Clarification of required testing based on risks associated with conductor secureness
• Adjustment of electronic circuit operational requirements
• Adjustment of derangement signal operational requirements
• Revisions to test switch requirements to use consistent terminology and establish mandatory language and to limit access to a maintained-break type test switch to service personnel
• Clarification of requirements for self-testing/self-diagnostic equipment
• Consolidation and clarification of requirements for disconnect switches and fuses
• Allowing UL 746E as an alternative to the conformal coating requirements in Sections 56 and 57
• Re-aligning requirements for flashing exit signs with UL 1638, delete the flashing rate stability reference, and adjust the reference for energizing at rated voltage
• Clarification of test voltages to expand the range of product voltage ratings subject to testing at either 120 or 240 volts
• Revision of the leakage current test to not require continuation of leakage current measurements through thermal stabilization
• Clarification of normal operation test requirements for manual test switches
• Revision of test method for standby rating input test
• Separating the over and undervoltage tests into two separate sections, editing for consistent terminology, and adjusting the test voltage to represent a modestly more severe condition
• Deletion of the humidity test in 56.3.1 as it is covered by 56.2.1
• Revision of test requirements for low frequency inverters
• Revision of test requirements for high frequency inverters
• Deletion of the alternative test program for battery recognition, Supplement SA
• Addressing redundant requirements in Supplement SB - Retrofit Fluorescent Fixture Inverter/Charger Packs
• Separation of extended ambient ratings from damp/wet ratings
• Eiminating low temperature testing of fluorescent and electroluminescent lamps
• Deletion of requirements for battery temperature regulation in Supplements SC and SD
• Not specifying both gasket adhesion tests in SD4.8.1
• Revising photoluminescent sign conditioning and activation levels
• Deletion of the exemption for minimum light output testing in Section SH2
• Luminance and illuminance measurement equipment parameters
• Revising requirements for instructions to require instructions to be available via internet and available to authorities having jurisdiction
• Deleting requirement that photoluminescent signs in accordance with Supplement G are for use only indoors
• Deleting requirements detailing how to mount a photoluminescent sign
• New and revised marking requirements for photoluminescent exit signs
• Adding an exception to not require a marking when equipment is solely for the control of remote loads
• Requiring overload and endurance testing of relays
• Adding required marking of relays based on type of load