UL 498
Standard for Attachment Plugs and Receptacles

DETAILS
Edition Number:15SCC Approved:--
Edition Date:2012-03-30DOD Approved: 1981-08-17
Price Code:DANSI Approved: 2016-07-07
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover attachment plugs, receptacles, cord connectors, inlets, current taps provided with wiring terminals for flexible cord, and flatiron and appliance plugs - all intended for connection to a branch circuit for use in accordance with the National Electrical Code, ANSI/NFPA 70.

    1.2 These requirements do not cover devices rated at more than 200 A or for more than 600 V. See 6.1.

    1.3 This Standard does not directly apply to, but supplements the following standards:

    a)     Devices produced integrally with flexible cord or cable, covered by the Standard for Cord Sets and Power-Supply Cords, UL 817;

    b)     Current taps and adapters not provided with wiring terminals for flexible cord covered by the Standard for Current Taps and Adapters, UL 498A;

    c)     Devices employing male or female screwshells, covered by the Standard for Lampholders, UL 496;

    d)     Devices solely intended for direct connection to the branch circuit in accordance with the National Electrical Code, ANSI/NFPA 70, that are provided with contacts of the pin and sleeve type, covered by the Standard for Plugs, Receptacles and Cable Connectors of the Pin-and-Sleeve Type, UL 1682;

    e)     Single and multipole connectors intended for factory assembly to copper or copper alloy conductors or printed wiring boards for use in data, signal, control and power applications within and between electrical equipment, covered by the Standard for Component Connectors for Use in Data, Signal, Control and Power Applications, UL 1977;

    f)     Devices intended for installation and use in hazardous (classified) locations in accordance with the National Electrical Code, ANSI/NFPA 70, covered by the Standard for Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations, UL 1203;

    g)     Devices intended for use with telecommunications networks, covered by the Standard for Information Technology Equipment – Safety – Part 1: General Requirements, UL 60950-1, or the Standard for Communications Circuit Accessories, UL 1863;

    h)     Devices incorporating ground-fault circuit interruption circuitry, covered by the Standard for Ground-Fault Circuit Interrupters, UL 943;

    i)     Single- or two-outlet direct plug-in devices incorporating transient voltage surge suppression circuitry, covered by the Standard for Surge Protective Devices, UL 1449;

    j)     Single- or two-outlet direct plug-in devices incorporating electromagnetic interference filter circuitry, covered by the Standard for Electromagnetic Interference Filters, UL 1283;

    k)     Cord-connected, relocatable power taps intended only for indoor use as a temporary extension of a grounding alternating-current branch circuit for general use, covered by the Standard for Relocatable Power Taps, UL 1363; or

    l)    Single pole locking-type separable connectors, covered by the Standard for Single Pole Locking-Type Separable Connectors, UL 1691.


    1.3 revised effective March 1, 2015

    1.4 This Standard contains the following supplements:

    a)    Supplement SA – Reserved for future use.

    b)    Supplement sb – Enclosure Types for Environmental Protection

    c)    Supplement sc – Marine Shore Power Inlets

    d)    Supplement sd – Hospital Grade Devices

    e)    Supplement se – Weather-Resistant Receptacles

    f)    Supplement sf – Receptacles with Integral Power Supply with Class 2 Output Connectors

    g)    Supplement sg – Recessed Outlet Kit Assembly


    1.4 revised February 27, 2014

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Glossary
          • 3 Components
          • 4 Units of Measurement
          • 5 References
        • CONSTRUCTION
          • ALL DEVICES
          • 6 General
          • 7 Configurations
          • 8 Insulating Materials
            • 8.1 General
            • 8.2 Flammability
            • 8.3 Electrical properties
            • 8.4 Thermal properties
            • 8.5 Vulcanized fiber
            • 8.6 Sealing compounds
            • 8.7 Fuse enclosures
          • 9 Enclosure
            • 9.1 General
            • 9.2 Male faces and wire terminations
          • 10 Current-Carrying Parts
            • 10.1 General
            • 10.2 Contacts
          • 11 Grounding and Dead Metal Parts
          • 12 Terminals
            • 12.1 General
            • 12.2 Wire-binding screw terminals
            • 12.3 Soldering lugs
            • 12.4 Pressure-wire terminals
            • 12.5 Combination wire binding/pressure-wire terminals
          • 13 Cord Entry and Strain Relief
          • 14 Spacings
          • 15 Assembly
            • 15.1 General
            • 15.2 Grounding and polarization
            • 15.3 Mating and interchangeability
            • 15.4 Fuseholders
            • 15.5 Switches
          • ATTACHMENT PLUGS AND INLETS
          • 16 Insulating Materials
          • 17 Enclosure
            • 17.1 General
            • 17.2 Grip
            • 17.3 Face size
          • 18 Current-Carrying Parts
          • 19 Grounding and Dead Metal Parts
          • 20 Terminals and Leads
            • 20.1 Terminals
            • 20.2 Leads
          • 21 Assembly
          • 22 Weatherproof Type
          • CORD CONNECTORS
          • 23 Enclosure
            • 23.1 General
            • 23.2 Face size
          • 24 Grounding and Dead Metal Parts
          • 25 Terminals
          • 26 Assembly
            • 26.1 General
            • 26.2 Outlet separation
          • RECEPTACLES
          • 27 Insulating Materials
          • 28 Enclosure
          • 29 Grounding and Dead Metal Parts
            • 29.1 General
            • 29.2 Flush receptacles
          • 30 Terminals and Leads
            • 30.1 General
            • 30.2 Push-in terminals
            • 30.3 Pin-type or insulation-displacement terminals
            • 30.4 Open wiring on insulators
            • 30.5 Leads
            • 30.6 Separable terminal assembly
          • 31 Assembly
            • 31.1 General
            • 31.2 Flush receptacles
            • 31.3 Surface-mount receptacles
          • 32 Flush Plates
          • 33 Self-Grounding Receptacles
          • 34 Isolated-Ground Receptacles
          • 35 CO/ALR Type
          • 36 AL-CU Type
          • 37 Tamper-Resistant Receptacles
          • 38 Weather-Resistant Receptacles
          • 39 Pendant Receptacles
          • 40 Pop-Out Receptacle
          • 41 Pop-Up Receptacle Assembly
          • 41A Rotatable Outlets
          • SELF-CONTAINED RECEPTACLES FOR USE WITHOUT A SEPARATE OUTLET BOX
          • 42 General
          • 43 Spacings
          • 44 Insulating Materials
          • 45 Enclosures
          • 46 Mounting Means
          • 47 Frame-Construction Mounting Brackets
          • 48 Field Replacement
          • CURRENT TAPS
          • 49 General
          • FLATIRON AND APPLIANCE PLUGS
          • 50 General
          • 51 Current-Carrying Parts
          • 52 Cord Guard
          • 53 Strain Relief
          • 54 Female Contacts
          • 55 Terminals
          • 56 Spacings
          • 57 Assembly
        • PERFORMANCE
          • GENERAL
          • 58 Representative Devices
          • All Devices
          • 59 Comparative Tracking Index Test
          • 60 Glow Wire Test
          • 61 High-Current Arc Resistance to Ignition Test
          • 62 Mold Stress Relief Test
          • 63 Moisture Absorption Resistance Test
          • 64 Dielectric Voltage-Withstand Test
            • 64.1 Devices for fixed or permanent installation
            • 64.2 Cord-connected devices
          • 65 Accelerated Aging Tests
            • 65.1 General
            • 65.2 Rubber, EPDM, and TEE compounds
            • 65.3 PVC compounds and copolymers
          • 66 Insulation Resistance Test
          • 67 Conductor Secureness Test
          • 68 Tightening Torque Test
          • ATTACHMENT PLUGS
          • All Devices
          • 69 General
          • 70 Security of Blades Test
            • 70.1 General
            • 70.2 Self-hinged plugs
          • 71 Secureness-Of-Cover Test
          • 72 Crushing Test
          • 73 Attachment Plug Grip Tests
          • 74 Integrity of Assembly Test
            • 74.1 General
            • 74.2 Self-hinged plugs
          • 75 Self-Hinge Flexing Test
          • 76 Terminal Temperature Test
          • 77 Fuseholder Temperature Test
          • Pin-Type Terminals
          • 78 General
          • 79 Assembly Test
          • 80 Temperature Test
          • 81 Strain Relief Test
          • 82 Fault Current Test
          • 83 Dielectric Voltage-Withstand Test
          • INLETS
          • All Devices
          • 84 General
          • 85 Security of Blades Test
          • 86 Terminal Temperature Test
          • 87 Fuseholder Temperature Test
          • Pressure-Wire Terminals
          • 88 General
          • 88A Combination Wire Binding/Pressure Wire-Type Terminals
          • 89 Strength of Insulating Base Test
          • CORD CONNECTORS
          • All Devices
          • 90 General
          • 91 Retention of Plugs Tests
          • 92 Overload Tests
            • 92.1 General
            • 92.2 Current overload test
            • 92.3 Horsepower overload test
          • 93 Temperature Test
          • 94 Retention of Plugs Test (Repeated)
            • 94.1 General
            • 94.2 Plug retention
            • 94.3 Plug Withdrawal
          • 95 Resistance to Arcing Test
          • 96 Latching Mechanism Tests
            • 96.1 General
            • 96.2 Cycling test
            • 96.3 Pull test
          • 97 Fuseholder Temperature Test
          • 98 Improper Insertion Test
          • 99 Potential Drop in Grounding Connections Test
          • 100 Integrity of Assembly Test
            • 100.1 General
            • 100.2 Self-hinged cord connectors
          • 101 Self-Hinge Flexing Test
          • Pin-Type Terminals
          • 102 General
          • 103 Assembly Test
          • 104 Temperature Test
          • 105 Strain Relief Test
          • 106 Fault Current Test
          • 107 Dielectric Voltage-Withstand Test
          • RECEPTACLES
          • All Devices
          • 108 General
          • 109 Retention of Blades Test
          • 110 Overload Test
          • 111 Temperature Test
          • 112 Retention of Blades Test (Repeated)
          • 113 Resistance to Arcing Test
          • 114 Retention of Plugs Test
          • 115 Overload Test
            • 115.1 General
            • 115.2 Current overload test
            • 115.3 Horsepower overload test
          • 116 Temperature Test
            • 116.1 Contact and terminal temperature
            • 116.2 Feed-through terminal temperature
          • 117 Retention of Plugs Test (Repeated)
            • 117.1 General
            • 117.2 Plug retention
            • 117.3 Plug withdrawal
          • 118 Resistance to Arcing Test
          • 119 Fuseholder Temperature Test
          • 120 Fault Current Test
          • 121 Terminal Strength Test
          • 122 Assembly Security Test
          • 123 Grounding Contact Test
          • Pressure-Wire Terminals
          • 124 General
          • 124A Combination Wire Binding/Pressure Wire-Type Terminals
          • 125 Strength of Insulating Base Test
          • Self-Grounding Receptacles
          • 126 General
          • 127 Fault Current Test
          • Push-In Terminals
          • 128 General
          • 129 Pullout Test
          • 130 Temperature Test
          • 131 Conductor Insertion and Retention Test
          • 132 Conductor Push-In Test
          • 133 Terminal Abuse Test
          • 134 Temperature Test
          • Tamper-Resistant Receptacles
          • 135 General
          • 136 Probe Test
          • 137 Impact Test
            • 137.1 General
            • 137.2 Ball-pendulum impact
            • 137.3 Vertical-ball impact
          • 138 Mechanical Endurance Test
          • 139 Dielectric Voltage-Withstand Test
          • RECEPTACLE WITH INTEGRAL ADJUSTABLE MOUNTING YOKE
          • 140 Bonding (Non-Metallic Outlet Box Fault Current) Test
          • 141 Bonding (Metallic Outlet Box Fault Current) Test
          • 142 Mounting Yoke Resistance Test
          • POP-OUT RECEPTACLES AND POP-UP RECEPTACLE ASSEMBLIES
          • 143 General
            • 143.1 Pop-out receptacles
            • 143.2 Pop-up receptacle assemblies
          • 144 Mechanical Endurance Test
          • 145 Mechanical Load Test
          • 146 Spill Test
          • Pin-Type or Insulation-Displacement Terminals
          • 147 General
          • 148 Heat Cycling and Vibration Tests
            • 148.1 General
            • 148.2 Heat cycling test
            • 148.3 Vibration test
            • 148.4 Heat cycling test (Continued)
            • 148.5 Calculations
          • Receptacles Employing a Separable Terminal Assembly
          • 149 General
          • 150 Retention of Tab Connection Test
          • 151 Separable Connector Pull Test
          • 152 Mold Stress Relief Test
          • 153 Dielectric Voltage-Withstand Test
          • 154 Grounding Contact Temperature Test
          • 155 Resistance Test
          • 156 Latching Mechanism Test
          • 157 Short Circuit Test
          • 158 Continuity Impedance Test
          • Receptacles Employing Rotatable Outlets
          • 158A General
          • 158B Rotational Endurance Test
          • 158C Temperature Test
          • 158D Dielectric Voltage-Withstand Test
          • 158E Resistance Test
          • 158F Fault Current Test
          • Self-Contained Receptacles
          • 159 General
          • 160 Heat Cycling and Vibration Tests
            • 160.1 General
            • 160.2 Heat cycling test
            • 160.3 Vibration test
            • 160.4 Calculations
          • 161 Cable Pullout Test
          • 162 Conductor Pullout Test
          • 163 Mounting Strength Test
            • 163.1 General
            • 163.2 Receptacles mounted directly in panels
            • 163.3 Receptacles supported by mounting brackets
            • 163.4 Testing
          • 164 Wall-Mounting Secureness Test
          • 165 Assembly Security Test
            • 165.1 General
            • 165.2 Method A
            • 165.3 Method B
          • 166 Field Replacement Test
          • 167 Fault Current Withstand Test
          • 168 Knockouts Test
          • 169 Creep Test
          • 170 Mold Stress Test
          • 171 Specimen Flammability Test
            • 171.1 General
            • 171.2 Method A
            • 171.3 Method B
          • CURRENT TAPS
          • All Devices
          • 172 General
          • 173 Contact Security Test
          • FLATIRON AND APPLIANCE PLUGS
          • 174 General
          • 175 Millivolt Drop Test
          • 176 Overload Test
          • 177 Heating Test
          • 178 Millivolt Drop Test Repeated
          • 179 Crushing Test
          • 180 Mechanical Endurance Test
          • 181 Accelerated Aging Test
          • 182 Cord Guard Test
        • RATINGS
          • 183 Details
        • MARKINGS AND INSTRUCTIONS
          • 184 General
            • 184.1 Details
            • 184.2 Location of markings and instructions
          • 185 Identification and Marking of Terminals
            • 185.1 Grounded and grounding
            • 185.2 Other terminals
            • 185.3 Removable parts
    • RECESSED OUTLET KIT ASSEMBLY
    • APPENDIX A
    • APPENDIX B Wiring Device Configurations