UL 67-2009 pdf download

UL 67-2009 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 1 008. 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 1 563. 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 1 640. 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.
2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components generally used in the products covered by this standard. 2.2 A component is not required to comply with a specific requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.4 Specific components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specified limits, and shall be used only under those specific conditions. 2.5 A component not marked with a short-circuit current rating is considered rated for use in a circuit having a maximum available fault current as shown in Table 2.1 .
2.6 The short-circuit current available in the secondary circuit of a transformer rated 1 0 kilovolt-amperes or less is considered to be 5000 amperes or less. 2.7 For other than a plug-in meter, a current-sensing meter in a panelboard shall be a type that has been subjected to a 60 hertz rms short-circuit current of 1 2,000 amperes for four electrical cycles, and a peak current of 30,000 amperes for one-half electrical cycle, and shall be provided with overcurrent protection as described in 23.8.5.2. A plug-in meter such as a watt-hour meter to be plugged into a meter socket base is not considered to be a part of the panelboard. Exception No. 1 : A meter need not have been tested nor provided with overcurrent protection if it is intended for use with a current transformer. Exception No. 2: A meter need not have been tested nor provided with overcurrent protection if it is used across a shunt that has been subjected to a short-circuit test as specified in Section 23, Short-Circuit Current Test. Exception No. 3: A meter need not have been subjected to a peak current of 30,000 amperes nor provided with overcurrent protection if the short-circuit current rating of the panelboard or the available fault current of the circuit at the meter is 1 4,000 amperes or less. Exception No. 4: The four electrical cycle test may be reduced to 1 0,000 amperes if the short-circuit current rating of the panelboard is 1 0,000 amperes or less. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information.UL 67-2009 pdf download.