UL 1310

These requirements cover direct plug-in Class 2 power units intended for connection to a 15-ampere, nominal 120- or 240- volt ac branch circuit, and cord-connected Class 2 power units intended for connection to a 15- or 20- ampere ac branch circuit with a potential of 150 volts or less to ground. These products utilize an isolating transformer and are able to incorporate rectifiers and other components to provide a source of alternating- or direct-current (dc) supply. These products are able to be provided with an optional dc input jack, intended to be powered by a vehicle battery adapter. These products provide Class 2 power levels in accordance with the National Electrical Code, ANSI/NFPA 70, and 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 .

These requirements do not cover products intended to charge batteries for starter motors used to start engines. Products of this type are covered by UL 1236, the Standard for Battery Chargers for Charging Engine-Starter Batteries.

These requirements cover Class 2 products, as defined in this standard, intended for use with toys. Products of this type shall also comply with UL 697, the Standard for Toy Transformers.