UL 67-2019 pdf download

UL 67-2019 pdf download.Panelboards.
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 6.5.1. 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.
5.14 CONTINUOUS DUTY – Operation at a substantially constant load for an indefinitely long time. 5.15 CURRENT-LIMITING DEVICE (AC) – An overcurrent protective device that, when interrupting currents in its current-limiting range, will reduce the current flowing in the faulted circuit to a magnitude substantially less than that obtainable in the same circuit if the device were replaced with a solid conductor having a comparable impedance. 5.16 CURRENT RATING – The designated maximum direct current or alternating current (RMS Amperes at rated frequency) that a device can carry continuously under specified conditions. 5.17 CUTOUT BOX – An enclosure designed for surface mounting that has swinging doors or covers secured directly to and telescoping with the walls of the box proper. 5.18 DEADFRONT – A barrier that prevents live parts from being exposed to a person on the operating side of the panelboard. 5.19 DEADFRONT SHIELD – A barrier that is used behind a door to cover wiring spaces and uninsulated live parts that would otherwise be exposed to a person when the door is open. 5.20 DEVICE – A unit of an electrical system that is intended to cary or control, but not utilie, electrical energy. 5.21 DIELECTRIC WITHSTAND TESTS – Tests to determine the ability of the insulating materials and spacings to withstand overvoltages. 5.22 DOUBLE-LUG PANELBOARD – A panelboard that has two sets of main line terminals, each set having sufficient current-carrying capacity to supply the panelboard, see Figures 5.1 and 5.2.
5.23 DUMMY FUSE (TEST LINK) – A current-carrying part made of copper and having dimensions such that it will fit its fuse-mounting means with the same conditions of pressure, contact, and cross-sectional areas as are obtained on terminals of the fuse that it is intended to replace. A dummy fuse shall not be a protective device. 5.24 ENCLOSED PANELBOARD – An assembly of buses and connections, overcurrent devices, and control apparatus with or without switches, or other equipment, installed in a suitable cabinet, cutout box, or enclosure suitable for a panelboard application. 5.25 ENCLOSED RECREATIONAL VEHICLE (RV) PANELBOARD – An enclosed panelboard intended to be installed in a recreational vehicle (RV) in accordance with Article 551 of the National Electrical Code, NFPA 70. 5.26 ENCLOSURE – A surrounding case constructed to provide a degree of protection to personnel against incidental contact with the enclosed equipment and to provide a degree of protection to the enclosed equipment against specified environmental conditions. 5.27 FEED-THROUGH LUG – A terminal that is connected to a main bus bar at the end opposite from the incoming line terminal or main device, if used, and that is provided for connection to an outgoing wire or cable, see Figure 5.3.UL 67-2019 pdf download.