UL 67
Standard for Panelboards

DETAILS
Edition Number:12SCC Approved:--
Edition Date:2009-03-18DOD Approved: 1990-06-18
Price Code:DANSI Approved: 2016-12-14
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover panelboards to be employed in accordance with the National Electrical Code, NFPA 70.

    1.2 These requirements cover panelboards for the control and protection of electric lighting and appliance branch circuits, and power circuits, including feeder distribution panelboards. They also cover units specifically designed for panelboard assembly.

    1.3 These requirements do not cover:

    a)    Distribution equipment which sole function is the automatic or nonautomatic transferring of one or more load conductor connections from one power source to another. Reference the Standard for Transfer Switch Equipment, UL 1008.

    b)    Factory wired assemblies of industrial control equipment intended to control industrial processes. Reference the Standard for Industrial Control Panels, UL 508A.

    c)    Distribution equipment containing only one circuit subdivision, unless also provided with a meter socket. See 5.5.1. Reference the Standard for Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures, UL 489.

    d)    Distribution equipment intended to serve as a means for distributing power required to operate mobile or temporarily installed equipment. Reference the Standard for Power Outlets, UL 231.

    e)    Factory wired assemblies of controllers, timers, temperature regulating equipment and such, intended for control of equipment for use with swimming pools, hot tubs, and/or spas. Reference the Standard for Electric Spas, Equipment Assemblies, and Associated Equipment, UL 1563.

    f)    Factory wired assemblies intended for the control of Architectural and Floating Fountains. Reference the Standards for Motor-Operated Water Pumps, UL 778, Underwater Luminaires and Submersible Junction Boxes, UL 676 and Industrial Control Panels, UL 508A.

    g)    Portable power distribution equipment. Reference the Standard for Portable Power-Distribution Equipment, UL 1640.

    h)    Panelboards with converter and/or inverter functions, intended for use as distribution equipment in recreational vehicles. Reference the Standard for Power Converters/Inverters and Power Converter/Inverter Systems for Land Vehicles and Marine Crafts, UL 458.


    1.3 revised January 11, 2013

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 3A Undated References
          • 4 Glossary
        • CONSTRUCTION
          • 5 General
            • 5.1 All panelboards
            • 5.2 Equipment on supply side of disconnect
            • 5.3 Distribution equipment
            • 5.4 Service equipment
            • 5.5 Branch circuits
            • 5.6 Electrical connections
            • 5.7 Field installable equipment
          • 6 Enclosure
            • 6.1 General
            • 6.2 Component arrangement
            • 6.3 Ventilating openings
          • 7 Bases and Supports – Insulating Material
          • 8 Covers, Barriers, and Partitions
            • 8.1 General
            • 8.2 Bushings
          • 9 Filler Plates
          • 10 Current-Carrying Parts
            • 10.1 General
            • 10.2 Bus bars, supports
            • 10.3 Ampacity General
            • 10.4 Main unit ratings
            • 10.5 Neutral
            • 10.6 Fuseholders and circuit breakers
          • 11 Wiring Terminals
            • 11.1 General
            • 11.2 Screw terminals
          • 11A Cord-Connectors
            • 11A.1 General
            • 11A.2 Input connections
            • 11A.3 Output connections
          • 12 Switches, Circuit Breakers, and Overcurrent-Protective Devices
            • 12.1 General
            • 12.2 Ratings
            • 12.3 Main and main-disconnect switches and circuit breakers
            • 12.4 Switches
            • 12.5 Overcurrent protective devices
            • 12.6 Lighting and appliance panelboards
            • 12.7 Fuseholders
            • 12.8 Panelboards with integral inlet
          • 13 Ground-Fault Protection
          • 14 Spacings
            • 14.1 General
            • 14.2 Switches
            • 14.3 Barriers and liners
            • 14.4 Tape
            • 14.5 Tubing
          • 15 Wiring Space, Wiring Gutters, and Wire Bending Space
            • 15.1 General
            • 15.2 Wiring space, wiring gutters, and terminal compartments
            • 15.3 Wire deflection and bending space
            • 15.4 Determination of deflection and bending space distances
          • 16 Grounding and Bonding
            • 16.1 General
            • 16.2 Equipment-grounding terminals
          • 17 Sharp Edges
          • 18 Separation of Circuits
        • PERFORMANCE
          • 19 Temperature Test
            • 19.1 General
            • 19.2 Main lug
            • 19.3 Main circuit breaker
            • 19.4 Neutral
            • 19.5 Clamped joints
            • 19.6 Other bus bar coatings
            • 19.7 Joints with insulators
          • 20 Rain Test
          • 21 Strength of Insulating Base and Support Test
          • 22 Mold Stress Relief Test
          • 23 Short-Circuit Current Test
            • 23.1 General
            • 23.2 Sample selection
            • 23.3 Sample preparation
            • 23.4 Line connections
            • 23.5 Load connections
            • 23.6 Fuses
            • 23.7 Meter mounting positions
            • 23.8 Short-circuit procedure
            • 23.9 Short-circuit tests
            • 23.10 Evaluation of test results
          • 24 Dielectric Voltage-Withstand Test
            • 24.1 General
            • 24.2 Joints with insulators
            • 24.3 After short circuit
            • 24.4 Insulating barriers
          • 25 Bonding Resistance Test
          • 26 Test Requirements for Panelboards Used as Transfer Equipment
        • MANUFACTURING AND PRODUCTION TESTS
          • 27 Ground-Fault Protection Test
        • RATING
          • 28 General
          • 29 Current
          • 30 Voltage
          • 31 Short Circuit Current – Details
        • MARKING
          • 32 Details
            • 32.1 General
            • 32.2 Wiring space and terminals
            • 32.3 Field-installed conductors
            • 32.4 Arrangement of terminals
            • 32.5 Tightening torque
            • 32.6 Enclosure type marking
            • 32.7 Switches and circuit breakers
            • 32.8 Lighting and appliance panelboards
            • 32.9 Service equipment
            • 32.10 Ground-fault protection
            • 32.11 Distribution equipment
            • 32.12 Field-installed equipment
            • 32.13 Equipment-grounding terminals
            • 32.14 Filler plates
            • 32.15 Neutral
            • 32.16 Parallel Power Source Panelboard
            • 32.17 Panelboard with provisions for cord connections
          • 33 Permanence of Marking
        • INSTALLATION INSTRUCTIONS
          • 34 Field Testing of Ground-Fault Protection of Equipment
    • CLASSIFIED MOLDED-CASE SURGE PROTECTIVE DEVICES (SPDs) FOR USE WITH SPECIFIED PANELBOARDS
    • APPENDIX A
    • Appendix B (Informative)
    • Superseded List