These requirements cover indoor and outdoor use Class 2 power supplies and battery chargers intended for use on alternating current branch circuits with a maximum potential of 150 V to ground. These requirements apply to:a) Portable and semipermanent mounted direct plug-in units provided with 15 A blade configurations for use on nominal 120 or 240 V branch circuits;b) Cord- and plug-connected units provided with a 15 or 20 A attachment plug configuration; andc) Units permanently connected to the input supply.Units may also be provided with a direct current input jack for being powered from a vehicle battery adapter. These units utilize an isolating transformer and may incorporate components to provide an alternating- or direct-current output. Each output provides Class 2 power levels in accordance with the National Electrical Code@ ANSI/NFPA 70. Maximum output voltage does not exceed 42.4 V peak for alternating current@ 60 V for continuous direct current. These products are intended primarily to provide power to low voltage@ electrically operated devices.These requirements cover products whose input power does not exceed 660 W under any possible condition of output loading.These requirements do not cover the effect that a power unit may have on the equipment or system to which it is connected.A product marked for a specific end-use (such as for use with audio-@ radio-@ or video-type equipment; medical or dental equipment; or tools) may be subject to additional requirements found in the applicable end-product standard. See 51.4.These requirements do not cover products intended to charge batteries for starter motors used to start engines. Products of this type are covered by the Standard for Battery Chargers for Charging Engine-Starter Batteries@ UL 1236.These requirements cover Class 2 products@ as defined in this standard@ intended for use with toys. Products of this type shall also comply with the Standard for Toy Transformers@ UL 697.These requirements do not cover products with outputs other than Class 2@ nor battery chargers intended to charge batteries employed in wheel chairs or similar types of mobility aids. Products of this type are covered by the Standard for Power Units Other Than Class 2@ UL 1012.Products without a rectifier may be covered by the Standard for Class 2 and Class 3 Transformers@ UL 1585.These requirements do not cover products powered solely by a dc source. Products of this type are covered by the Standard for Power Converters/Inverters and Power Converter/Inverter Systems for Land Vehicles and Marine Craft@ UL 458@ or by other requirements appropriate for the intended application.These requirements do not cover products intended for supplying low voltage landscape lighting. Products of this type are covered by the Standard for Low Voltage Landscape Lighting Systems@ UL 1838.
2017UL 1310 BULLETIN-2017 UL Standard for Safety Class 2 Power Units (COMMENTS DUE: JUNE 19@ 2017)
2016UL 1310 CRD-2016 UL Standard for Safety Class 2 Power Units - Section / Paragraph Reference: 24.1 Subject: Spacing requirements on a semiconductor device (Edition 6: August 26, 2011)
2016UL 1310 BULLETIN-2016 UL Standard for Safety Class 2 Power Units (COMMENTS DUE: JANUARY 29@ 2016)
2015UL 1310 CRD-2015 UL Standard for Safety Class 2 Power Units - Section / Paragraph Reference: 81.2 Subject: Flush Device Cover Plate with Integral Power Supply Employing Spring Contact Terminals (Edition 6: August 26, 2011)
2015UL 1310 BULLETIN-2015 UL Standard for Safety Class 2 Power Units (COMMENTS DUE: NOVEMBER 19@ 2015)
2014UL 1310 CRD-2014 UL Standard for Safety Class 2 Power Units - Section / Paragraph Reference: 81 - 89 (New) Subject: Flush Device Cover Plate with Integral Power Supply with Class 2 Output Connector(s) with or without a Night Light (Edition 6: August 26, 2011)
2014UL 1310 BULLETIN-2014 UL Standard for Safety Class 2 Power Units (COMMENTS DUE: SEPTEMBER 4@ 2014)
2013UL 1310 CRD-2013 UL Standard for Safety Class 2 Power Units - Section / Paragraph Reference: Table 33.1@ Section 70 Subject: Maximum acceptable surface temperature for permanently connected units (Edition 6: August 26@ 2011)
2013UL 1310 BULLETIN-2013 UL Standard for Safety Class 2 Power Units (COMMENTS DUE: OCTOBER 21@ 2013)
2012UL 1310 BULLETIN-2012 UL Standard for Safety Class 2 Power Units (COMMENTS DUE: December 17@ 2012)
2011UL 1310 BULLETIN-2011 UL Standard for Safety Class 2 Power Units (COMMENTS DUE: August 08@ 2011)