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The UL enterprise [4] is a global private safety company headquartered in Northbrook, Illinois, composed of three organizations, UL Research Institutes, UL Standards & Engagement and UL Solutions. Established in 1894, the UL enterprise was founded as the Underwriters' Electrical Bureau (a bureau of the National Board of Fire Underwriters ), [ 5 ...
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.
Standards that have been updated include UL 365, UL 603, UL 609, UL 636, UL 1076, UL 1610, and UL 1635, among others. [ 16 ] This standard specifies the technical criteria for various components and aspects of the alarm systems, such as installation requirements, enclosures, electrical protection, field wiring connections, internal wiring, and ...
DG/DG# – diesel generator ('#'- means identification letter or number of the equipment i.e. DG3 or DG#3 means diesel generator nr 3) DGA – diglycoamine; DGDS – dual-gradient drilling systems; DGP – dynamic geohistory plot (3D technique) [10] DH – drilling history; DHC – depositional history curve; DHSV – downhole safety valve
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 (safety organization), an American worldwide safety consulting and certification company previously known as Underwriters Laboratories Unia Lewicy a Polish political party Unilever (stock symbol), a multinational corporation
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10-6 Busy. Busy, stand by Busy -Stand by unless urgent Busy Busy 10-7 Out of service. Out of service (Give location and/or telephone number) Out of Service Out at ... Out of Service 10-7 A — Not Available 10-7 B Off Radio 10-8 In service. In Service Clear In Service 10-9 Repeat, conditions bad. Repeat Say Again 10-10 Out of service—subject ...