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UL headquarters in Northbrook, Illinois. Underwriters Laboratories Inc. was founded in 1894 by William Henry Merrill.After graduating from the Massachusetts Institute of Technology (MIT) with a degree in electrical engineering in 1889, Merrill went to work as an electrical inspector for the Boston Board of Fire Underwriters. [9]
A certification listing is a document used to guide installations of certified products. After a field installation is completed, it is compared to the list to make sure that it complies with a regulation (e.g., a building code).
UL 94, the Standard for Safety of Flammability of Plastic Materials for Parts in Devices and Appliances testing, is a plastics flammability standard released by Underwriters Laboratories of the United States. [1] The standard determines the material's tendency to either extinguish or spread the flame once the specimen has been ignited.
European Siren for fire detection system. A fire alarm notification appliance is an active fire protection component of a fire alarm system.A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action.
Testing in Canada is in accordance with ULC-S101 as required by the local building code.. Inherently fire resistive cables can be tested to UL 2196, Tests for Fire Resistive Cables, whereas enclosures for cables that are not inherently fire resistive can be tested to UL 1724 or USNRC Generic Letter 86-10, Supplement 1 in North America, or BS476 in the United Kingdom or DIN4102 in Germany.
This experience led him to eventually found the Underwriter's Electrical Bureau in 1894, [2] which later became Underwriters Laboratories in 1903. From 1903 to 1909, he was the Secretary and Treasurer of the National Fire Protection Association, becoming the President of the association from 1910 to 1912. In 1916 he became the first president ...
In the late 1990s, Underwriters Laboratories changed the definition of a single station CO detector with a sound device to carbon monoxide (CO) alarm. This applies to all CO safety alarms that meet UL 2034 standard; [1] however for passive indicators and system devices that meet UL 2075, UL refers to these as carbon monoxide detectors. Most CO ...
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