UL 498
Standard for Attachment Plugs and Receptacles

DETAILS
Edition Number:16SCC Approved:--
Edition Date:2017-04-28DOD Approved: 1981-08-17
Price Code:DANSI Approved: 2017-04-28
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.

    1.4 This Standard contains the following supplements:

    a)    Supplement sa – Enclosure Types for Environmental Protection

    b)    Supplement sb – Marine Shore Power Inlets

    c)    Supplement sc – Hospital Grade Devices

    d)    Supplement sd – Weather-Resistant Receptacles

    e)    Supplement se – Receptacles with Integral Power Supply with Class 2 Output Connectors

    f)    Supplement sf – Recessed Outlet Kit Assembly

  • 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
          • 42 Rotatable Outlets
          • SELF-CONTAINED RECEPTACLES FOR USE WITHOUT A SEPARATE OUTLET BOX
          • 43 General
          • 44 Spacings
          • 45 Insulating Materials
          • 46 Enclosures
          • 47 Mounting Means
          • 48 Frame-Construction Mounting Brackets
          • 49 Field Replacement
          • CURRENT TAPS
          • 50 General
          • FLATIRON AND APPLIANCE PLUGS
          • 51 General
          • 52 Current-Carrying Parts
          • 53 Cord Guard
          • 54 Strain Relief
          • 55 Female Contacts
          • 56 Terminals
          • 57 Spacings
          • 58 Assembly
        • PERFORMANCE
          • GENERAL
          • 59 Representative Devices
          • All Devices
          • 60 Comparative Tracking Index Test
          • 61 Glow Wire Test
          • 62 High-Current Arc Resistance to Ignition Test
          • 63 Mold Stress Relief Test
          • 64 Moisture Absorption Resistance Test
          • 65 Dielectric Voltage-Withstand Test
            • 65.1 Devices for fixed or permanent installation
            • 65.2 Cord-connected devices
          • 66 Accelerated Aging Tests
            • 66.1 General
            • 66.2 Rubber, EPDM, and TEE compounds
            • 66.3 PVC compounds and copolymers
          • 67 Insulation Resistance Test
          • 68 Conductor Secureness Test
          • 69 Tightening Torque Test
          • ATTACHMENT PLUGS
          • All Devices
          • 70 General
          • 71 Security of Blades Test
            • 71.1 General
            • 71.2 Self-hinged plugs
          • 72 Secureness-Of-Cover Test
          • 73 Crushing Test
          • 74 Attachment Plug Grip Tests
          • 75 Integrity of Assembly Test
            • 75.1 General
            • 75.2 Self-hinged plugs
          • 76 Self-Hinge Flexing Test
          • 77 Terminal Temperature Test
          • 78 Fuseholder Temperature Test
          • Pin-Type Terminals
          • 79 General
          • 80 Assembly Test
          • 81 Temperature Test
          • 82 Strain Relief Test
          • 83 Fault Current Test
          • 84 Dielectric Voltage-Withstand Test
          • INLETS
          • All Devices
          • 85 General
          • 86 Security of Blades Test
          • 87 Terminal Temperature Test
          • 88 Fuseholder Temperature Test
          • Pressure-Wire Terminals
          • 89 General
          • 90 Combination Wire Binding/Pressure Wire-Type Terminals
          • 91 Strength of Insulating Base Test
          • CORD CONNECTORS
          • All Devices
          • 92 General
          • 93 Retention of Plugs Tests
          • 94 Overload Tests
            • 94.1 General
            • 94.2 Current overload test
            • 94.3 Horsepower overload test
          • 95 Temperature Test
          • 96 Retention of Plugs Test (Repeated)
            • 96.1 General
            • 96.2 Plug retention
            • 96.3 Plug withdrawal
          • 97 Resistance to Arcing Test
          • 98 Latching Mechanism Tests
            • 98.1 General
            • 98.2 Cycling test
            • 98.3 Pull test
          • 99 Fuseholder Temperature Test
          • 100 Improper Insertion Test
          • 101 Potential Drop in Grounding Connections Test
          • 102 Integrity of Assembly Test
            • 102.1 General
            • 102.2 Self-hinged cord connectors
          • 103 Self-Hinge Flexing Test
          • Pin-Type Terminals
          • 104 General
          • 105 Assembly Test
          • 106 Temperature Test
          • 107 Strain Relief Test
          • 108 Fault Current Test
          • 109 Dielectric Voltage-Withstand Test
          • RECEPTACLES
          • All Devices
          • 110 General
          • 111 Retention of Blades Test
          • 112 Overload Test
          • 113 Temperature Test
          • 114 Retention of Blades Test (Repeated)
          • 115 Resistance to Arcing Test
          • 116 Retention of Plugs Test
          • 117 Overload Test
            • 117.1 General
            • 117.2 Current overload test
            • 117.3 Horsepower overload test
          • 118 Temperature Test
            • 118.1 Contact and terminal temperature
            • 118.2 Feed-through terminal temperature
          • 119 Retention of Plugs Test (Repeated)
            • 119.1 General
            • 119.2 Plug retention
            • 119.3 Plug withdrawal
          • 120 Resistance to Arcing Test
          • 121 Fuseholder Temperature Test
          • 122 Fault Current Test
          • 123 Terminal Strength Test
          • 124 Assembly Security Test
          • 125 Grounding Contact Test
          • Pressure-Wire Terminals
          • 126 General
          • 127 Combination Wire Binding/Pressure Wire-Type Terminals
          • 128 Strength of Insulating Base Test
          • Self-Grounding Receptacles
          • 129 General
          • 130 Fault Current Test
          • Push-In Terminals
          • 131 General
          • 132 Pullout Test
          • 133 Temperature Test
          • 134 Conductor Insertion and Retention Test
          • 135 Conductor Push-In Test
          • 136 Terminal Abuse Test
          • 137 Temperature Test
          • Tamper-Resistant Receptacles
          • 138 General
          • 139 Probe Test
          • 140 Impact Test
            • 140.1 General
            • 140.2 Ball-pendulum impact
            • 140.3 Vertical-ball impact
          • 141 Mechanical Endurance Test
          • 142 Dielectric Voltage-Withstand Test
          • RECEPTACLE WITH INTEGRAL ADJUSTABLE MOUNTING YOKE
          • 143 Bonding (Non-Metallic Outlet Box Fault Current) Test
          • 144 Bonding (Metallic Outlet Box Fault Current) Test
          • 145 Mounting Yoke Resistance Test
          • POP-OUT RECEPTACLES AND POP-UP RECEPTACLE ASSEMBLIES
          • 146 General
            • 146.1 Pop-out receptacles
            • 146.2 Pop-up receptacle assemblies
          • 147 Mechanical Endurance Test
          • 148 Mechanical Load Test
          • 149 Spill Test
          • Pin-Type or Insulation-Displacement Terminals
          • 150 General
          • 151 Heat Cycling and Vibration Tests
            • 151.1 General
            • 151.2 Heat cycling test
            • 151.3 Vibration test
            • 151.4 Heat cycling test (Continued)
            • 151.5 Calculations
          • Receptacles Employing a Separable Terminal Assembly
          • 152 General
          • 153 Retention of Tab Connection Test
          • 154 Separable Connector Pull Test
          • 155 Mold Stress Relief Test
          • 156 Dielectric Voltage-Withstand Test
          • 157 Grounding Contact Temperature Test
          • 158 Resistance Test
          • 159 Latching Mechanism Test
          • 160 Short Circuit Test
          • 161 Continuity Impedance Test
          • Receptacles Employing Rotatable Outlets
          • 162 General
          • 163 Rotational Endurance Test
          • 164 Temperature Test
          • 165 Dielectric Voltage-Withstand Test
          • 166 Resistance Test
          • 167 Fault Current Test
          • Self-Contained Receptacles
          • 168 General
          • 169 Heat Cycling and Vibration Tests
            • 169.1 General
            • 169.2 Heat cycling test
            • 169.3 Vibration test
            • 169.4 Calculations
          • 170 Cable Pullout Test
          • 171 Conductor Pullout Test
          • 172 Mounting Strength Test
            • 172.1 General
            • 172.2 Receptacles mounted directly in panels
            • 172.3 Receptacles supported by mounting brackets
            • 172.4 Testing
          • 173 Wall-Mounting Secureness Test
          • 174 Assembly Security Test
            • 174.1 General
            • 174.2 Method A
            • 174.3 Method B
          • 175 Field Replacement Test
          • 176 Fault Current Withstand Test
          • 177 Knockouts Test
          • 178 Creep Test
          • 179 Mold Stress Test
          • 180 Specimen Flammability Test
            • 180.1 General
            • 180.2 Method A
            • 180.3 Method B
          • CURRENT TAPS
          • All Devices
          • 181 General
          • 182 Contact Security Test
          • FLATIRON AND APPLIANCE PLUGS
          • 183 General
          • 184 Millivolt Drop Test
          • 185 Overload Test
          • 186 Heating Test
          • 187 Millivolt Drop Test Repeated
          • 188 Crushing Test
          • 189 Mechanical Endurance Test
          • 190 Accelerated Aging Test
          • 191 Cord Guard Test
        • RATINGS
          • 192 Details
        • MARKINGS AND INSTRUCTIONS
          • 193 General
            • 193.1 Details
            • 193.2 Location of markings and instructions
          • 194 Identification and Marking of Terminals
            • 194.1 Grounded and grounding
            • 194.2 Other terminals
            • 194.3 Removable parts
    • RECESSED OUTLET KIT ASSEMBLY
    • APPENDIX A
    • APPENDIX B Wiring Device Configurations