UL SUBJECT 962B-2015 UL Outline for Investigation Merchandise Display and Rack Mounted Power Distribution Units (Issue 1).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJULY 6, 20151UL 962BOutline of Investigation for Merchandise Display and Rack Mounted PowerDistribution UnitsIssue Number: 1July 6, 2015Summary of TopicsThis First issue of the Outline of Investi

2、gation for Merchandise Displayand Rack Mounted Power Distribution Units, UL 962B, covers cord andplug connected Power Distribution Units that are intended for use withmerchandise displays, rack and gondola shelving systems to providepower to electrical utilization equipment.The effective date for UL

3、 LLC will be announced through Industry File Review Announcement Letter.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investigation and all copyrights, ownerships, and right

4、s regardingthose Outlines of Investigation shall remain the sole and exclusive property of UL.COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJULY 6, 2015UL 962B2No Text on This PageUL COPYRIGHTED M

5、ATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 Components 53 Units of Measurement .64 Undated References 65 Application and Use .66 Glossary .6CONSTRUCTION7 General 78 Enclosure 89 Mechanical Assembly .810 Accessibility of Liv

6、e Parts .811 Mounting Means .812 Corrosion Protection .913 Insulating Materials 914 Power Supply Cords, Interconnecting Cord Assemblies and Cord Whips .914.1 General 914.2 Power supply cords 914.3 Interconnecting cord assemblies .1014.4 Cord whips 1115 Strain Relief 1116 Merchandise Power Outlets 12

7、17 Supplementary Protection 1218 Switches .1219 Electrically Energized Parts 1320 Internal Wiring 1321 Spacings 1322 Printed-Wiring Boards .1323 Separation of Circuits .1324 Grounding and Bonding .13PERFORMANCE25 General 1326 Temperature Test .1427 Dielectric Voltage Withstand Test .1428 Leakage Cur

8、rent Test 1429 Grounding Continuity Test .1430 Fault Current Test 1431 Overcurrent Test 1432 Rack Mounted MDRMPDUs .15MANUFACTURING AND PRODUCTION-LINE TESTS33 Grounding-Continuity Test .1534 Polarity 1535 Dielectric Voltage-Withstand Test 15JULY 6, 2015 UL 962B 3UL COPYRIGHTED MATERIAL NOT AUTHORIZ

9、ED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULMARKINGS36 Details .16INSTRUCTIONS37 General 18APPENDIX AStandards for ComponentsA1JULY 6, 2015UL 962B4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1

10、These requirements cover cord and plug connected, indoor use, dry location Merchandise Displayand Rack Mounted Power Distribution Units (MDRMPDU). They are intended for use on merchandisedisplays, racks and gondola shelving systems in retail stores to provide power for computers, audio andvideo equi

11、pment and other electrical utilization equipment that is displayed on the merchandise display,rack or gondola shelving unit. A MDRMPDU is not intended for use in general applications. These unitsare rated 250 Vac or less, 20 Amp or less, single phase for use on single circuits only.1.2 MDRMPDUs may

12、be extendable.1.3 Merchandise Display Rack Mounted Power Distribution Units are not for use:a) At construction sites and similar locations;b) As a substitute for fixed wiring of a building or structure;c) For routing through walls, windows, ceilings, floors or similar openings of buildings orstructu

13、res;d) For attachment to buildings or structures;e) When concealed by walls, floors, or ceilings; andf) Where subjected to physical damage.2 Components2.1 Except as indicated in 2.2, a component of a product covered by this Outline shall comply with therequirements for that component. See Appendix A

14、 for a list of standards covering components used in theproducts covered by this Outline.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 theproduct covered by this Outline; orb) Is

15、superseded by a requirement in this Outline.2.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.4 Specific components are incomplete in construction features or restricted in performance capabilities.Such components are intended for use only un

16、der limited conditions, such as certain temperatures notexceeding specified limits, and shall be used only under those specific conditions.JULY 6, 2015 UL 962B 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 Units of Measurement3.1 Values s

17、tated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.3.2 Unless otherwise indicated, all voltage and current values mentioned in this Outline areroot-mean-square (rms).4 Undated References4.1 Any undated reference to a code or standard appear

18、ing in the requirements of this outline shall beinterpreted as referring to the latest edition of that code or standard.5 Application and Use5.1 A MDRMPDU is intended to be connected to a permanently installed branch circuit receptacle outletor to another MDRMPDU of the same type or model and manufa

19、cturer.5.2 A MDRMPDU is not intended to be permanently mounted to the building structure.5.3 A MDRMPDU is not to be connected to an extension cord.6 Glossary6.1 For the purpose of this outline, the following definitions apply. Where not defined by this Outline, thefollowing terms as well as the glos

20、sary terms found in the Standard for Relocatable Power Taps, UL 1363,apply to this outline.6.2 ATTACHMENT PLUG The male contact device of a power supply cord or interconnect cord.6.3 CORD CONNECTOR A female contact device wired onto flexible cord.6.4 CORD WHIP A length of flexible cord assembled wit

21、h either a line fitting or a load fitting on one endand no fitting on the other end.6.5 DETACHABLE POWER SUPPLY CORD A length of flexible cord with an attachment plug as a linefitting and with a single cord connector as a load fitting.6.6 EXTENDABLE MDRMPDU A MDRMPDU that can be connected to the sam

22、e manufacturers andtype or model MDRMPDU in an interconnected configuration.6.7 GONDOLA Typically an “L” shaped store fixture with the short leg being a fixed flat bottom shelfand the long leg being a vertical support for the attachment of additional merchandise shelves.6.8 INTERCONNECTING CORD ASSE

23、MBLY A length of flexible cord with a load fitting on the end andan attachment plug on the other end.JULY 6, 2015UL 962B6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.9 MERCHANDISE DISPLAY RACK MOUNTED POWER DISTRIBUTION UNIT (MDRMPDU) A c

24、ordand plug connected, indoor use, power strip, which consists of a single detachable or non detachablepower supply cord and outlets that may be controlled by a switch. These units are intended for use on amerchandise display, rack storage or gondola shelving system in stores to provide power for el

25、ectricalutilization equipment that is supported by the merchandise display, rack or gondola shelving system.6.10 NONDETACHABLE POWER SUPPLY CORD A length of flexible cord with an attachment plug asa line fitting and the other end secured to the enclosure.6.11 RACK OR RACKING A support shelving syste

26、m used for the support of palletized merchandise,heavy merchandise, bulk merchandise often found in warehouse store environments.CONSTRUCTION7 General7.1 A Merchandise Display and Rack Mounted Power Distribution Unit (MDRMPDU) covered by thisOutline shall comply with all the requirements contained i

27、n the Standard for Relocatable Power Taps, UL1363, except as specified in this outline.7.2 The overall length of a complete unit including, power supply cord, enclosure(s) and interconnectingcords shall not exceed 50 ft (15.24 m) for a system constructed with 12 AWG copper conductors nor 35ft (10.7

28、m) for a system constructed with 14 AWG copper conductors. The maximum length shall complywith the Grounding Continuity Test, Section 29. The unit shall be marked in accordance with 36.5.7.3 For an extendable MDRMPDU, each MDRMPDU section shall employ a female ANSI/NEMA WD6 -L5-15R, L5-20R, L6-15R o

29、r L6-20R, locking type configuration receptacle for the output of power to thenext unit section. The fitting shall be mounted in the enclosure of the MDRMPDU or as the termination ofa cord whip.Exception: The connector may comply with the connector requirements of the Standard for ManufacturedWiring

30、 Systems, UL 183.7.4 For extendable MDRMPDUs, each MDRMPDU section shall employ a male ANSI/NEMA WD6 -L5-15P, L5-20P, L6-15P or L6-20P, locking type configuration plug for the input of power from theprevious unit section. The fitting shall be mounted in the enclosure of the MDRMPDU or as a terminati

31、onof a cord whip.Exception: The connector may comply with the connector requirements of the Standard for ManufacturedWiring Systems, UL 183.7.5 Mating connectors shall:a) Be of the locking type;b) Be reliably keyed by a physical or mechanical means to maintain correct polarity consistentwith the wir

32、ing diagram on the power-feed of connected parts and proper interconnection ofparts;c) Be reliably keyed so that a system with a lower ampere rating cannot interconnect to asystem with a higher ampere rating;JULY 6, 2015 UL 962B 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDIST

33、RIBUTION WITHOUT PERMISSION FROM ULd) Have the grounding-conductor terminals connect before the mating supply-conductorterminals connect when two or more connectors are mated as intended. During disconnection ofmating connectors, the supply-conductor terminals shall disconnect before the grounding-c

34、onductor terminal disconnects; ande) Be rated 15 or 20 amperes.Exception: In a limited-energy circuit, the mating connector may be rated for maximum current available.8 Enclosure8.1 An electrical enclosure shall comply with the Standard for Relocatable Power Taps, UL 1363.8.2 The overall length of a

35、 section enclosure for merchandise displays and gondola shelving shall notexceed 48 in. (1219 mm). The enclosure shall be marked as shown in 36.7.8.3 The overall length of a section enclosure for racks shall not exceed 144 in. (3658 mm).8.4 The enclosure shall contain the load fittings to power the

36、merchandise on display.9 Mechanical Assembly9.1 The physical construction of the MDRMPDU shall comply with the Standard for Relocatable PowerTaps, UL 1363.10 Accessibility of Live Parts10.1 The accessibility of live parts shall comply with the Standard for Relocatable Power Taps, UL 1363.11 Mounting

37、 Means11.1 The mounting means of the MDRMPDU shall comply with the Standard for Furniture PowerDistribution Units, UL 962A, except as detailed in 11.2 11.411.2 Each MDRMPDU shall be provided with a mounting means. The mounting means shall require theuse of a tool for mounting or removal of the enclo

38、sure from the merchandise display, rack or gondolashelving system.11.3 The mounting hardware shall be supplied with each enclosure.11.4 Installation instructions shall be provided. Instructions shall show mounting orientation and methodsin both written and diagrammatic form. See 37.5.JULY 6, 2015UL

39、962B8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12 Corrosion Protection12.1 The corrosion protection of the MDRMPDU shall comply with the Standard for Relocatable PowerTaps, UL 1363.13 Insulating Materials13.1 Insulating materials used in

40、 the construction of the MDRMPDU shall comply with the Standard forRelocatable Power Taps, UL 1363.14 Power Supply Cords, Interconnecting Cord Assemblies and Cord Whips14.1 General14.1.1 Power-supply cords, interconnecting cord assemblies and cord whips shall comply with theStandard for Relocatable

41、Power Taps, UL 1363; power-supply cord requirements except as detailedbelow:a) The minimum conductor size of the flexible cord shall be 14 AWG copper when a L5-15P orL6-15P attachment plug is provided and 12 AWG copper when a L5-20P or L6-20P attachmentplug is provided.b) The power-supply cord for a

42、 merchandise display or gondola shelving system shall be of thegrounding type and shall employ one of the following flexible cord types: SJ, SJE, SJO, SJT,SJTO, or equivalent.c) The power-supply cord for a rack shelving system shall be of the grounding type and shallemploy one of the following flexi

43、ble cord types: S, SE, SO, ST, STO, or equivalent.d) Shall not contain any “Ts”, “Ys” or similar splices or junctions.14.2 Power supply cords14.2.1 A non-detachable or detachable power-supply cord may be used in a MDRMPDU.14.2.2 Attachment plugs shall be of the ANSI/NEMA WD6 - L5-15P, L5-20P, L6-15P

44、 or L6-20P, lockingtype configuration.14.2.3 When provided with a detachable power-supply cord, the cord shall be provided with a cordconnector of the ANSI/NEMA WD6 - L5-15R, L5-20R, L6-15R or L6-20R, locking type configuration at theopposite end of the attachment plug, to mate with the male attachm

45、ent plug or connector in theMDRMPDU section. The assembly shall be marked in accordance with 36.5 and 36.6.Exception: The female connector may comply with the connector requirements of the Standard forManufactured Wiring Systems, UL 183.JULY 6, 2015 UL 962B 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FO

46、R FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL14.3 Interconnecting cord assemblies14.3.1 The interconnecting cord assembly shall be used to connect two enclosure sections of anextendable MDRMPDU together. See Figure 14.1.Figure 14.1Interconnecting cord14.3.2 The male and female fit

47、tings on an interconnecting cord assembly shall be of the ANSI/NEMAWD6 - L5 or L6, 15 or 20 Amp, locking type configuration. The assembly shall be marked in accordancewith 36.5 and 36.6.Exception: The male and female connector may comply with the connector requirements of the Standardfor Manufacture

48、d Wiring Systems, UL 183.14.3.3 An interconnecting cord assembly shall contain one male attachment plug and one femalecord-connector. Interconnecting cord assemblies with two male attachment plugs or two femalecord-connectors are not permitted.Exception: An interconnecting cord assembly shall contai

49、n one male and one female connector thatcomplies with the Standard for Manufactured Wiring Systems, UL 183.14.3.4 An interconnecting cord assembly exceeding 24 in. (610 mm) in length shall be provided with amethod of attaching the cord to the merchandise display, rack or gondola shelving system at intervals notexceeding 24 in. (610 mm). The attachment method shall provide a non-metallic bushing or equivalent indirect contact with the cord jacket. The attachment device shall be secured to the cord in a manner thatrequires a deliberate action by the user