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Understanding UL 9540A, NFPA 855 and Large-Scale Fire Testing for Battery Energy Storage Systems NFPA 855 and UL 9540A updates mandate large‑scale BESS fire testing, defining thermal runaway, vent‑gas ignition and...Guide Unconditioned Spaces and the Application of UL 539 Heat Alarms Discover how UL 539 and ULC 589 support reliable operation of heat alarms in unconditioned spaces, strengthening...Guide Special Purpose Ground-Fault Circuit Interrupters 2026 NEC revisions advance safety with new requirements for special purpose ground-fault circuit interrupters (SPGFCIs)...Guide Prefabricated Privacy Booths and Sleep Capsules Learn how UL 962 addresses safety, fire protection and construction requirements for prefabricated privacy booths and...Guide Article 130 Energy Management Systems The 2026 NEC adds new PCS requirements, separating energy management from overload control to ensure safer, flexible...Guide Third-Party Certification of Building Materials This overview addresses commonly asked questions regarding building products and assemblies’ compliance and...Guide High-Frequency Ground-Fault Circuit Interrupters Learn about major updates in the 2026 National Electrical Code, including new ground-fault circuit interrupters for...Guide Understanding IoT and its Impact on Fire, Electrical and Security Safety Learn how the Internet of Things is transforming capabilities and enhancing safety while introducing new risks that code...FAQ Pop-up Receptacle Assemblies for Kitchen Countertops Learn what UL Solutions requires for the certification of pop-up countertop receptacle assemblies, from basic...Guide Fire Resistance-Rated Walls Adjoining Unprotected Steel Beams Learn about code compliance issues that surface with fire resistance-rated assemblies attached to unprotected steel...Fact Sheet Power Control Systems: Advancing Electrification for New and Existing Infrastructure Learn how a reliable power control system (PCS) can help support safer modernization of electrical systems in a world...Guide Fire Doors for Linen and Waste Chutes Explore International Building Code and the Life Safety Code requirements for linen and waste chutes and how to...Guide Introducing new features from UL Product iQ Explore useful new features in UL Product iQ®, the online platform for verifying certifications, accessing guide...Guide The UL Component Recognition Classification Learn more about the UL Recognized Component Mark and wetting agent Classification and why they matter for code...Fact Sheet Firefighter Personal Protective Equipment: Adjusting to Industry Demands Discover how the updated NFPA 1970 standard is eliminating hazardous chemicals from turnout gear—enhancing long-term...Guide Building the 2024 Convening of the Councils Report Explore the process behind writing the 2024 The Convening of the Councils Report to learn about our dedication to...Guide UL Certification Requirements: A Product Guide to Inspections This guide serves as a tool to help inspectors and code authorities gain the knowledge, resources and confidence needed...Guide Aboveground Flammable Liquid Tanks: Compliance with UL 142, UL 2080 and UL 2085 Catch up on UL 142, 2080 and 2085 certifications, fire code essentials and UL Listings for compliant aboveground...Guide Beyond Installation: Challenges in Passive Fire Protection Compliance Reinforce firestop engineering judgments (EJs) with third-party oversight. See how UL Solutions TEDP helps support code...Guide Securing Peace of Mind: Access Control and Gate Operators UL 294 and UL 325 certification help manufacturers align with code requirements for automated gates, doors and...Guide UL Solutions Offers Services for Electric Utility Grid Code Compliance Learn how verifying alternative energy system behavior through testing and simulation can help manufacturers and...Guide Cybersecurity for Security and Life Safety Signaling Systems UL Solutions provides an overview of cybersecurity for security and life safety signaling systems and the standards in...Guide Distributed Energy Resource Systems (Microgrids): What Code Authorities Should Know Learn from UL Solutions about the increasing complexity of microgrids and how to mitigate the potential hazards they...Guide UL Solutions Updates Guide Information for Fire-Rated Wall Stud Metal Thickness Gain a better understanding of steel stud and gypsum board wall assemblies and when these products must bear the UL...Fact Sheet Product Certification Marks for Firestop Systems Learn more about differences in how the UL Mark may appear based on region, country and other specific attributes.Fact Sheet Can Fire Doors Be Installed in Area Separation Fire Walls? Learn more about the risks associated with installing gypsum area separation firewalls.Fact Sheet Electric Vehicle Safety: The Critical Role of Testing and Certification of Personnel Protection Systems Learn about the importance of testing, evaluation and certification for personnel protection systems (PPSs) for electric...Guide UL Fire Door Inspection and Field Evaluation Programs: What Are the Differences? Gain an overview of UL Solutions’ fire door inspection program and field evaluation services that can help you confirm...Fact Sheet Five Themes Shaping the Fire, Electrical and Security Industries Learn about key themes shaping the fire, electrical and security industries, based on critical insights synthesized in...FAQ FAQ — Enhanced and Smart UL Certification Mark Find answers to common questions related to the enhanced and smart UL certification Marks and what they represent in the...Guide HVAC System Installation and Inspection Support Checklists Two checklists from UL Solutions created to help support the safe installation and inspection of HVAC systems containing...FAQ Hospital Grade Power Strips UL Solutions Certifies hospital grade power strips according to UL 2930, the Standard for Cord-and-Plug-Connected Health...Fact Sheet New UL Standard Published: UL 1487, Battery Containment Enclosures Learn about the first edition of UL 1487, the Standard for Battery Containment Enclosures, a binational standard for the...Fact Sheet UL 217, Standard for Smoke Alarms Published with New Technical Requirements Gain a detailed overview of the most recent updates to UL 217, the Standard for Smoke Alarms, and how these changes...Fact Sheet Water Mist Fire Protection for One and Two Family Homes UL Solutions Certified a water mist fire protection system unit intended to detect and identify the specific location of...Guide Lightning Protection Application Guide The need for certified lightning protection is increasing, and this guide looks at the requirements that support a...FAQ FAQ - UL Certified LED Retrofit Luminaire Conversion Kits Learn how retrofit luminaire conversion kits affect UL Listing and what to consider when working with a retrofitted...Guide Locking Configurations for Access and Egress Control Learn about achieving code compliance with UL Certified products while allowing free egress and still supporting...FAQ Cross Bracing in a Wall Assembly UL Solutions offers an overview of cross-bracing the stud cavity and provides answers to two common questions.FAQ Enhancements to Numbering System for Steel Stud Wall Designs A new numbering system provides a clearer picture of the fire resistance rated assembly type based on construction...Guide Deadfront Switchboard Application Guide A guide to the application of Certified (Listed) deadfront switchboards.How To Getting Started with UL Standards UL Standards play an important role in achieving safe, code-compliant installations. Code authorities can benefit from...How To Finding UL Listed and Certified Fire-Rated Products with UL Product iQ® Use these instructions to create your UL Product iQ account and search the certification database for UL fire-rated...Fact Sheet Understanding Fire Rated Ducts Explore the different types of fire-rated ductwork and how to find the right fire-rated duct solution.Fact Sheet Carbon Monoxide Alarm Considerations for Code Authorities Obtain a basic understanding of CO poisoning, CO alarms, how they are Listed, and how they are to be installed and...Fact Sheet Plywood Panels in UL Fire-Resistant Wall Assemblies Learn the criteria under which plywood panels can be added to a UL fire-resistance rated wall assembly to increase...Fact Sheet Line Side Connectors Learn NEC® requirements for wire connectors used for splicing or tapping conductors on the line side of service...How To Evaluation Reports Learn about evaluation reports provided by UL Solutions to support guidance in determining compliance with code...How To UL Solutions Numbering Systems for Penetration Firestop Systems and Joint Systems Explore UL Solutions numbering systems for penetration firestop and joint systems to support accurate identification and...Join usWorking at UL SolutionsUL Solutions CareersHelp CenterTools, Apps and DatabasesReport a ConcernContact UsManage Your SubscriptionsLocationsNewsMedia CenterInvestor RelationsUL LogoOnline PoliciesImpressumAbout CookiesData Subject Access Request PortalLinkedInXFacebookInstagramYoutube

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