Free Standards Library

UL 252-2017 pdf download - Compressed Gas Regulators. 8.3 An inlet connection shall not permit attachment of a station or line regulator to a storage cylinder. 8.4 Pipe threads shall comply with the Standard for Pipe Threads...

UL 448-2017 pdf download - Centrifugal Stationary Pumps for Fire-Protection Service Exception: A pump intendedforuse in installations where the connection piping has national pipe flange dimensions that are different from these standards shall be permitted to be...

UL 498-2017 pdf download - Attachment Plugs and Receptacles. 2 Glossary 2.1 For the purposes of this Standard, the following definitions apply. 2.2 APPLIANCE COUPLER – A single-outlet, female contact device for attachment to a flexible cord...

UL 539-2017 pdf download - Single and Multiple Station Heat Alarms. 4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the...

UL 705-2017 pdf download - Power Ventilators. 2 Glossary 2.1 For the purpose of this standard, the following definitions apply. 2.2 CAPACITOR, CLASS X – Capacitor or RC unit of a type suitable for use in situations...

UL 749-2017 pdf download - Household Dishwashers. 3.18 HEATING ELEMENT – The actual electrical conducting medium that is intended to be heated by an electric current. 3.19 LOCATION, PROTECTED – An outdoor location that is partially protected...