4 Replies Latest reply: May 11, 2010 11:04 AM by hminsky RSS

What is UL1310 for?

hminsky Level 2

I have been spec'ing out wall mount AC-DC converters for powering a lamp design, and was asked if I needed UL1310 approval. Can anyone tell me what the purpose of that is? Is it

a requirement for harsh environments, or just indoor consumer appliances?

  • 1. Re: What is UL1310 for?
    JeffTaylor1973 PremierFarnell

    The Tinterweb say's:

     

    Scope:

    These requirements cover indoor and outdoor use Class 2 power supplies and battery chargers. 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 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 alternating current branch circuits with a maximum potential of 150 V to ground;

    b) Cord- and plug-connected units provided with a 15 or 20 A attachment plug configuration for use on nominal 120 or 240 V alternating current branch circuits with a maximum potential of 150 V to ground; and

    c) Units permanently connected to the input supply for use on nominal 600 V or less alternating or direct current branch circuit.

    Direct plug-in and cord-connected units may also be provided with an integral cigarette lighter connector assembly, or a direct current input jack for being powered from a vehicle battery adapter or from a data port associated with information technology equipment. 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 direct plug-in and cord-connected 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 Low Voltage Transformers – Part 1: General Requirements, UL 5085-1, and the Standard for Low Voltage Transformers – Part 3: Class 2 and Class 3 Transformers, UL 5085-3.

  • 2. Re: What is UL1310 for?
    hminsky Level 2

    Thanks for your reply. In your experience, is meeting this spec overkill for a consumer product that will be used primarily indoors, such as a desk lamp? Or is

    it something that people would expect to see in a lamp they bought in a retail store?

  • 4. Re: What is UL1310 for?
    hminsky Level 2

    I found a nice presentation from Intertek

     

    http://www.google.com/url?sa=t&source=web&ct=res&cd=7&ved=0CDQQFjAG&url=http%3A%2F%2Fimg.ledsmagazine.com%2Fobjects%2Ffeatures%2F6%2F9%2F1%2FIntertek.pdf&ei=3n3pS72tC8GBlAf2lYDfCg&usg=AFQjCNGhzsxWIjI8SZ2y5PoytXfYJAUi2g&sig2=p2lqamnq51NHG9uckk-nbg

     

    It only briefly mentions UL 1310, which seems to indicate it is a higher safety standard than some baseline. But it seems like a good requirement to have for the power supply, because it specifies

    an isolation transformer, which seems like something that provides an extra failsafe that some of the really small switching power supplies sometimes do not have.