Wheelock Q&A LED technology

safety mass solutions Branchport Avenue Branch NJ 07740 800 631 2148 732 962 7859 NFPA 72 Light Pulse Duration Requirements Latest Solutions What are the new codes for light pulse duration The National Fire Protection Association NFPA updated visual signal light pulse in the 2016 edition of NFPA 72 National Fire Alarm and Signaling Code new code update states in section 18.5.3 that the maximum light pulse duration shall 20 milliseconds ms for all applications The light pulse duration was reduced from milliseconds 0.2 seconds in the previous edition of NFPA 72 to 20 milliseconds seconds in the 2016 edition Why is the pulse duration important for fire alarm signaling The shorter light pulse requires a much brighter light output to reach the required rating The latest research shows that the brighter light output the high peak was found to be more effective at alerting people who were not looking directly the strobe indirect viewing The research indicates that the peak level of light must equivalent to a visual signal appliance with a pulse width of 20 ms or less to be used both direct and indirect applications What is the time interval of a visual signal appliance light pulse width The light pulse width is the time interval between initial rising and final falling edge a pulsing light on time measured at 10 percent of maximum signal or peak intensity When do these codes go into effect NFPA 72 2016 went into effect January 1 2016 What is the responsibility of the integrator The light pulse duration pulse width is part of the listing process under UL 1971 for However it does not necessitate any special attention from installers or designers other than verifying that the device is listed to comply with the UL requirement Installers can check the product label and or verify that the product meets 20 ms requirement in the installation instructions Can you mix xenon visual signal appliances and LED devices in the same field of Yes by meeting the 20 ms light pulse duration requirement and passing a series of tests the new Wheelock Exceder LED3 devices by Eaton have been listed UL to allow mixing of Wheelock xenon devices in the same field of view With the new Eaton now offers a full range of products with low and high candela settings ideal for retrofits and new construction Are the new Exceder LED3 strobes compatible with OEM fire panels Yes the Wheelock Exceder LED3 product line has been UL ULC listed as compatible all fire alarm control panels and accessories that have been determined to be with Wheelock RSS strobe based products Laboratories UL confirms that the Wheelock Exceder LED3 product line been investigated and meets NFPA 20 millisecond light pulse duration code In addition the Wheelock Exceder LED3 product line LHS3 LST3 LHN3 LFHNK3 LFHSK3 has been listed as compatible with all Fire Alarm Control and accessories that have been determined to be compatible with Wheelock based products including the RSS CH E EH ET ST HS MT S8 SA STH Z Series This listing allows for up to 105 strobes LED3 devices per NAC depending Candela setting and NAC ratings Will the new Exceder LED3 model numbers be listed in the OEM compatibility No not necessarily The Exceder LED3 Series has been listed by UL to be compatible with Wheelock xenon RSS strobe based products Therefore any that is listed with any one of Eaton RSS strobe based products has been to be compatible with the Exceder LED3 series What are the advantages of using LED as a light source for visual signal appliances As in most industries LEDs provide high energy efficient technology and LED strobes the industry in low current draw most popular candela settings which can provide overall system cost savings This includes reduction in wire size fewer power and less battery standby capacity required for the same coverage area LED as the light source for strobes is an innovative approach in more ways than cost savings The LED light engine can closely control and manage the light source output It maximizes human response to a light pulse and optimizes light based on of area and perception of the human eye LED technology provides a way to this engine and thus optimizes light output In comparison with the xenon light can be controlled It is flash only In addition light source life of the LED is to 100,000 hours vs the xenon strobe with 1000 to 5000 hours of life assuming operation Where can I find additional information on NFPA 72 2016 Visual Signal Appliance Pulse Duration Codes and Eaton latest product lines that comply with these Review NFPA 72 2016 National Fire Alarm and Signaling Code Handbook 18.5.3 Eaton com massnotification email LifeSafety Eaton com or speak to your local representative 2017 Eaton Rights Reserved in USA No PA450006EN 2017