UL 1012
Standard for Power Units Other Than Class 2

DETAILS
Edition Number:8SCC Approved:--
Edition Date:2010-11-09DOD Approved: --
Price Code:CANSI Approved: 2016-04-04
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover portable, stationary, and fixed power units having an input rating of 600 volts or less, direct- and alternating- current, with at least one output not marked Class 2, and that are intended to be employed in ordinary locations in accordance with the National Electrical Code, ANSI/NFPA 70.

    1.2 These requirements cover general purpose power supplies and power supplies for uses such as to supply some household appliances, school laboratories, cathodic protection equipment; power supply-battery charger combinations; and industrial equipment, including inverters, divided into two classes – those rated 10 kilovolt-amperes or less and those rated more than 10 kilovolt-amperes.

    1.3 Power units with all outputs identified as Class 2 are covered under the Standard for Class 2 Power Units, UL 1310.

    1.4 These requirements do not cover the following types of battery chargers:

    a)    Battery chargers intended to charge motor-starting batteries as covered by Standard for Battery Chargers for Charging Engine-Starter Batteries, UL 1236;

    b)    Battery chargers for charging industrial batteries which power material handling trucks, tractors, personnel carriers, and similar motive equipment, as covered by the Standard for Industrial Battery Chargers, UL 1564;

    c)    Chargers or charging functions incorporated into converter or inverters for use in recreational vehicles and boats, as covered by the Standard for Power Converters/Inverters and Power Converter/Inverter Systems for Land Vehicles and Marine Crafts, UL 458; and

    d)    Charge controllers or charging functions incorporated into equipment for use in independent power systems, as covered by the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741.

    1.5 A battery charger not wholly within the scope of one of the standards specified in 1.4 shall be investigated to the requirements of this Standard supplemented by the applicable requirements of whichever of the standards in 1.4 is most applicable.

    1.6 These requirements do not cover a power supply for a fire-protective or burglary-protective signaling system, electrostatic-air cleaning equipment, recreational vehicles, electric discharge or neon tubing, test equipment for commercial or industrial laboratories; or an appliance or system in which the power supply is used.

    1.7 These requirements cover power supplies for centralized ac or dc power systems, including dc power supplies, rectifiers, and the like, that form part of these systems.

    1.8 A power supply that is intended for use with a specific type of product other than as referenced in 1.2 is investigated under the standard for that end product.

    1.9 These requirements do not cover the effect that a power supply may have on an equipment or a system to which it is connected.

    1.10 A power system, the primary function of which is maintaining continuity of an alternating power source in case of input power failure, is covered under the Standard for Uninterruptible Power Systems, UL 1778.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Terminology
          • 5 Undated References
          • 6 Glossary
        • ALL POWER UNITS
          • CONSTRUCTION
          • 7 Frame and Enclosure
            • 7.1 General
            • 7.2 Mounting means
            • 7.3 Integral meters
            • 7.4 Supporting material
            • 7.5 Doors and covers
            • 7.6 Protection against injury to persons
            • 7.7 Modular units
          • 8 Accessibility of Uninsulated Live Parts, Film-Coated Wire, and Moving Parts
          • 9 Protection of Service Personnel
            • 9.1 General
            • 9.2 Mechanical servicing
            • 9.3 Electrical servicing
          • 10 Assembly
          • 11 Protection Against Corrosion
          • 12 Supply Connections
            • 12.1 Permanently-connected power units
            • 12.2 Wiring terminals and leads
            • 12.3 Cord-connected power units
            • 12.4 Strain relief
            • 12.5 Bushings
          • 13 Output Connections
          • 14 Interconnections Between Sections
          • 15 Battery Charger Backfeed Protection
          • 16 Grounding Connections
          • 17 Bonding of Internal Parts
            • 17.1 General
            • 17.2 Bonding conductor
          • 18 Identification for Connection of Grounded Conductors
          • 19 Wire Bending Space
          • 20 Output Circuit Grounding
          • 21 Live Parts
          • 22 Internal Wiring
            • 22.1 General
            • 22.2 Protection of wiring
            • 22.3 Electrical connections
          • 23 Separation of Circuits
            • 23.1 Factory wiring
            • 23.2 Separation barriers
            • 23.3 Field wiring
          • 24 Insulating Materials
          • 25 Motors
          • 26 Transformers
            • 26.1 General
            • 26.2 Coil insulation
          • 27 Resistors
          • 28 Switches and Controls
          • 29 Overload-Protective Devices
          • 30 Fuses and Fuseholders
          • 31 Output Alternating Current Power Circuits
          • 32 Lampholders
          • 33 Capacitors
          • 34 Printed Wiring
          • 35 Spacings
            • 35.1 General
            • 35.2 Alternative Spacings
            • 35.3 Insulation liners and barriers
          • 36 Control Circuits
          • 37 Accessible Signal Circuits
          • 38 Class 2 and Class 3 Output Circuits
          • PERFORMANCE
          • 39 General
          • 40 Leakage Current Test
          • 41 Power Input Test
          • 42 Temperature Test
          • 43 Dielectric Voltage Withstand Test
            • 43.1 General
            • 43.2 Induced potential test
            • 43.3 Maximum-voltage measurements
          • 44 Tests on Insulating Materials
          • 45 Mechanical Strength Tests for Metal Enclosures
          • 46 Strain Relief and Bushing
          • 47 Push-Back Relief Test
          • 48 Overload of Switches and Controls
          • 49 Static Load Test
          • 50 Stability Test
          • 51 Isolated Limited Energy Circuit Capacity
          • 52 Overcurrent Protection Calibration Test
          • 53 Neutral to Ground Potential Measurement Test
          • 54 Abnormal Tests
            • 54.1 General
            • 54.2 Output short-circuit test
            • 54.3 Blocked fan test
            • 54.4 Fuse short circuit test
            • 54.5 Voltage selector test
            • 54.6 Relay and solenoid burnout
            • 54.7 Transformer overload tests
            • 54.8 Component short- and open-circuit test
            • 54.9 Backfeed protection
            • 54.10 Autotransformer
            • 54.11 Evaluation of reduced spacings on printed-wiring boards
            • 54.12 Reverse polarity test
          • 55 Flanged Bobbin Transformer Abnormal Test
          • 56 Capacitor Test
          • 57 Bonding Conductor Test
          • 58 Hot, Flaming Oil Test
          • MANUFACTURING AND PRODUCTION TESTS
          • 59 Dielectric Voltage Withstand Test
          • 60 Grounding Continuity Test
          • MARKING
          • 61 Details
            • 61.1 Cautionary markings
            • 61.2 General markings
            • 61.3 Application
          • 62 Instructions
            • 62.1 General
            • 62.2 Battery chargers
        • SPECIFIC POWER UNITS
          • OUTDOOR-USE POWER UNITS
          • 63 General
          • 64 Construction
            • 64.1 Enclosure
            • 64.2 Supply connections
            • 64.3 Output connections and wiring
          • 65 Performance
            • 65.1 Rain conditioning
            • 65.2 Physical properties
          • 66 Marking
          • PLUG-IN POWER UNITS
          • 67 General
          • 68 Construction
          • 69 Performance
          • 70 Marking
          • SCHOOL-LABORATORY POWER SUPPLIES
          • 71 General
          • 72 Construction
            • 72.1 Primary power supply connections
            • 72.2 Grounding
            • 72.3 Output terminals
          • 73 Performance
          • 74 Marking
          • POWER SUPPLIES RATED MORE THAN 10 KILOVOLT-AMPERES
          • 75 General
          • 76 Temperature Test
          • 77 Dielectric Voltage Withstand Test
            • 77.1 General
            • 77.2 Induced potential
          • 78 Overload Test
          • CLASS 3 OUTPUTS – DC, OR AC DERIVED FROM NON-LINEAR SOURCES
          • 79 General
          • 80 Construction
          • 81 Overcurrent Protection
          • 82 Components
          • 83 Maximum Output Voltage Test
          • 84 Output Current and Power Test
            • 84.1 General
            • 84.2 Inherently limited
            • 84.3 Not inherently limited
          • 85 Calibration of Overcurrent Protection Devices Test
          • 86 Component Breakdown
          • 87 Markings
          • FOREIGN VOLTAGE ADAPTERS
          • 88 General
          • 89 Scope
          • 90 Glossary
          • 91 U.S. to Foreign Adapters
            • 91.1 Construction
            • 91.2 Performance
            • 91.3 Electrical ratings
            • 91.4 User instructions
          • 92 Foreign to U.S. Adapters
            • 92.1 Construction
            • 92.2 Performance
            • 92.3 Electrical ratings
            • 92.4 User instructions
        • RECHARGEABLE BATTERIES WITH INTEGRAL CHARGERS
          • 93 Scope
          • 94 Glossary
          • 95 General
          • 96 Construction
            • 96.1 Enclosure
            • 96.2 Battery
            • 96.3 RBP’s with a lithium battery
            • 96.4 Supply connections
            • 96.5 Solar cell protection
          • 97 Performance
            • 97.1 Power input test
            • 97.2 Normal temperature test
            • 97.3 Solar cell reverse current overload test
            • 97.4 Mechanical strength tests
          • 98 Markings
          • 99 Instructions
        • POWER UNITS FOR INSTALLATION IN AIR-HANDLING SPACES
          • 100 Scope
          • 101 General
          • 102 Marking
    • APPENDIX A