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UL 508-2021 pdf download - Industrial Control Equipment. 1.4 Industrial control panels are covered by the requirements in the Standard for Industrial Control Panels, UL 508A. 1.5 Fire pump controllers are covered by the requirements in the...

UL 507-2020 pdf download - Electric Fans. 2.3.12 OPERATING CONTROL – A device or circuit, the operation of which, starts or regulates the appliance during normal operation. Note: Examples of operating controls include motor controls not relied...

UL 498-2019 pdf download - Attachment Plugs and Receptacles. 2.39 TERMINAL, PUSH-IN – A terminal where the stripped end of a conductor is pushed into the terminal and the clamping pressure is maintained by a spring mechanism,...

UL 448-2020 pdf download - Centrifugal Stationary Pumps for Fire- Protection Service. 1 Scope 1.1 These requirements cover stationary centrifugal fire pumps intended for use in water-supply systems for fire-protection service. 1.2 The pumps covered by these...

UL 444-2021 pdf download - Communications Cables. 1 Scope 1.1 This standard applies to 60 – 250°C single- or multiple-conductor jacketed or unjacketed, integral or nonintegral cables and single or multiple coaxial cables for telephone and other...

UL 399-2020 pdf download - Drinking Water Coolers. 5.4 *ADJUSTABLE SPEED DRIVE SYSTEM – An interconnected combination of equipment that provides a means of adjusting the speed of a mechanical load coupled to a motor. A drive...

UL 330-2021 pdf download - Hose and Hose Assemblies for Dispensing Flammable and Combustible Liquids. 8.4 A protective coating shall provide resistance against corrosion to a degree not less than that provided by the protective coatings specified...

UL 199-2020 pdf download - Automatic Sprinklers for Fire-Protection Service. 5.28 RECESSED CEILING SPRINKLER – A sprinkler assembly in which all or part of the sprinkler body or frame, other than the inlet thread, is mounted within...