OSHA recognizes UL as a nationally recognized testing laboratory for in-building 2-way emergency radio communication enhancement systems

NORTHBROOK, Illinois – Dec. 1, 2021 – UL, the global safety science leader, announced today that the Occupational Safety and Health Administration (OSHA) recognized UL LLC as an OSHA Nationally Recognized Testing Laboratory (NRTL) for UL 2524, the Standard for In-building 2-Way Emergency Radio Communication Enhancement Systems. When saving lives depends on reliable communication during emergencies, first responders rely on two-way radios to speak with each other,Emergency Radio Communication Enhancement Systems (ERCES) can improve wireless communication by enhancing the coverage area and increasing signal strength.

“As first responders are called into large buildings and tall skyscrapers, radio systems sometimes are not equipped to communicate with each other over such great distances,” said Allan Sanedrin, a principal engineer for the Fire and Life Safety Signaling Systems team at UL. “When in-building emergency responder radio systems comply with UL 2524, they will perform as intended, helping to improve first
responder’s safety during emergency situations. With the OSHA recognition of UL 2524, 2 this further communicates this Standard’s importance to building managers around the country.”

UL has been evaluating ERCES to UL 2524 since the Outline of Investigation’s publication on Dec. 21, 2017, and has served as an active member of the Standards Technical Panel that developed UL 2524, since the Standard was first published June 13, 2018. The current second edition of UL 2524, revised Feb. 28, 2019, is a binational Standard for the United States and Canada.

The completed 2021 edition of the International Fire Code and the first draft version of 2021 National Fire Protection Association (NFPA) 1 both include specific requirements for these systems to be certified to UL 2524. NFPA 1225, the Standard for Emergency Services Communications, 2022 Edition, requires ERCES to be certified to UL 2524.

This Standard covers a wide range of in-building two-way radio communication
products, including:

  •  Repeaters
  •  Transmitters
  •  Receivers
  •  Signal booster components
  •  Remote annunciators
  •  Operational consoles
  •  Power supplies
  •  Battery charging system components

Find these UL Certified ERCES components under the In-Building Emergency Radio Communication Enhancement Systems and In-Building Emergency Radio Communication Enhancement Systems Certified for Canada categories on the UL Product iQ® website at

Learn more about UL’s testing and certification services for ERCES.

About UL

UL is the global safety science leader. We deliver testing, inspection and certification (TIC), training and advisory services, risk management solutions and essential business insights to help our customers, based in more than 100 countries, achieve their safety, security and sustainability goals. Our deep knowledge of products and intelligence across supply chains make us the partner of choice for customers with complex
challenges. Discover more at

For information about Standards development and other nonprofit activities, visit

Join the discussion

Copyright © 2023 EMS1. All rights reserved.