UL 962A CRD-2016 UL Standard for Safety Furniture Power Distribution Units - Section Paragraph Reference 12 1 4 Subject Power Supply Cord Length (Edition 4 February 22 2016).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a

2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): IYNCStandard Number: UL 962AStandard Title: Standard for Furniture Power Distribution UnitsEdition Date: September 29, 2014Edition Number: 3Section / Paragra

3、ph Reference: Sections 1 (Scope); 5 (Glossary); Sections 12.1.10,12.3 (Construction) and 31 (Performance)Subject: Class 2 LeadDECISION:1 Scope1.1 These requirements cover indoor use cord and plug connected furniture power distribution units(FPDU) rated 250 V AC or less and 20 Amperes or less. An FPD

4、U may include an integral Class 2 powersupply with an integral lead and/or connector(s) output. FPDUs are for fixed mounting to furnishings asa power supply connection for cord and plug connected electrical utilization equipment in accordance withthe National Electric Code, NFPA 70.5 Glossary5.2.1 C

5、LASS 2 LEAD - Consists of a factory-made, power-limited cable with a connector at one end. Theother end is secured within the housing or enclosure of the FPDU. The connector is intended forconnection to the Class 2 separable interface.5.2.2 CLASS 2 SEPARABLE INTERFACE A separable component containin

6、g Class 2 low-voltageconnector(s) only (such as Universal Serial Bus (USB) connectors).5.5 FURNITURE POWER DISTRIBUTION UNIT (FPDU) m) Provided with an integral Class 2 lead and mating Class 2 separable interface, or an integralpower supply with one or more Class 2 output connector(s).12.1.10 Class

7、2 Lead12.1.11 A Class 2 lead may be one of the following types:a) Type CL2 cable in accordance with the Standard for Power-Limited Circuit Cables, UL 13b) An appliance wiring material with a maximum length of 10 feet (3.5 m), minimum of 26 AWG,rated minimum VW-1 flammability and minimum 300 V, in ac

8、cordance with the Standard forAppliance Wiring Material, UL 758.12.1.12 One end of a Class 2 lead shall be either molded-on or permanently attached to the FPDUhousing or enclosure.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12.1.13 The oth

9、er end of a Class 2 lead shall terminate in a connector capable of being inserted into themating connector of the Class 2 separable interface.12.1.14 Permanently attached can be achieved by crimping, welding, riveting, or equivalent, to render theconnector non-rewireable.12.3 Strain Relief12.3.1 Str

10、ain relief shall be provided so that a mechanical stress on a power-supply cord or a Class 2 leadis not transmitted to terminals, splices, or interior wiring. See Strain Relief Test, Section 31.PERFORMANCE31 Strain Relief Test31.3 An FPDU that is also provided with an integral Class 2 lead shall be

11、additionally subjected to thetesting method described in 31.2 except the pull values shown in Table 31 shall be applied to the Class2 lead.Table 31Pull valuesSize of conductor Pull forceAWG (mm2) lbf (N)32 (0.03) 0.5 (2.2)30 (0.05) 1 (4.4)28 (0.08) 2 (8.9)26 (0.13) 4 (17.8)24 (0.20) 6 (26.7)2022 (0.

12、52 0.32) 8 (36)MARKINGS47.22 A Class 2 lead or Class 2 separable interface shall be identified as being “Class 2” and marked withthe output electrical rating. The “Class 2” and output electrical rating shall be permanently marked andvisible after installation.RATIONALE FOR DECISION:UL 962A permits a

13、 furniture power distribution unit to employ a Class 2 power supply with low-voltageconnectors (such as USB outputs). The Standard does not address a Class 2 power supply withlow-voltage connectors where the low-voltage connectors extend from the furniture power distributionenclosure by an insulated

14、 lead. The strain relief pull values are based upon present pull force values forsimilar types of an insulated leads in the Standard UL 1977 Standard for Power, Control and SignalingApplications.Copyright 2016 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objec

15、tives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically applying the requirements of the standard.

16、They do not represent formal interpretations of theSTANDARD NUMBER: UL 962A -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULstandard under American National Standards Institute (ANSI) processes. UL shall not be responsible toanyone for the

17、use of or reliance upon Certification Requirement Decisions by anyone. UL shall not incurany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertificat

18、ion Requirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 962A -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSTANDARD NUMBER: UL 962A -4-No Text on This Page