1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared by UL LLC. It is normative for the applicable ULProduct Certification Program(
2、s); however, it is currently not part of the UL Standard(s) referencedbelow.Product Category (CCN): ZMVV/ZMVV2Standard Number: UL 486A-486BStandard Title: Standard for Wire ConnectorsEdition Date: January 11, 2013Edition Number: 2Section / Paragraph Reference: 1.4, 1.5, 1.6, 10.16, Table 28, Table 2
3、9Subject: Increase Voltage Ratings to 2000 VoltsDECISION:1.4 In the United States and Mexico, these requirements cover insulated connectors, insulating caps, andcovers intended for use at 2000 600 volts or less (1000 volts in a sign or luminaire)and uninsulatedconnectors for use in general use circu
4、its rated 35 000 2 000volts nominal or less.In Canada, these requirements cover insulated connectors, insulating caps, and covers intended for useat 600 volts or less (1 000 volts in a sign or luminaire) and uninsulated connectors for circuits rated 2 000volts phase-to-phase or less. Uninsulated con
5、nectors may also be used in applications up to 5 000 voltsphase-to-phase where allowed and installed in accordance with Section 36 of the Canadian ElectricalCode, Part I, C22.1.1.5 Reserved. This standard also applies to uninsulated connectors (both terminal and splicing types) foruse in circuits ra
6、ted 35 000 volts or less.1.6 This Standard does not apply to:a) insulated connectors for voltage levels above 2 000 V; 600 V (1 000 V in a sign, lightingfixture, or luminaire);b) manual twist-on connectors;c) built-in terminal connectors in devices rated less than 30 A intended for outlet box mounti
7、ngor having provision for stress relief;d) flat quick connect terminals; ande) wire binding screw terminals.10.16 An insulated connector shall be marked with the voltage rating. The marked voltage rating shall be:300 volts maximum, 600 volts maximum, “1000 volts maximum”, “1500 volts maximum”, “2000
8、 voltsmaximum”, or 600 volts maximum, building wiring: 1000 volts maximum, signs or luminaries,orequivalent wording. The marking shall be allowed to be on the unit container or on an information sheetpacked in the unit container.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTR
9、IBUTION WITHOUT PERMISSION FROM ULTable 28 - Insulation puncture and flashover test voltages, Tests A and B(Clauses 9.5.2.4, 9.5.3.1, and 9.5.3.2)Connector insulation voltage rating, VTest voltage, VacPuncture ( 1 min) Flashover (Maximum)300 2 200 4 000600 (1 000 in signs and luminaires) 3 400 8 000
10、1000 5 000 11 0001500 7 000 16 0002000 9 000 21 000Table 29 - Flashover test voltage, Test C(Clause 9.5.4.1)Connector insulation voltage rating, V Flashover test voltage, Vac300 1 600600 (1 000 in signs and luminaires) 3 0001000 4 4001500 6 4002000 8 400RATIONALE FOR DECISION:Voltage applications gr
11、eater than 600 volts are becoming more commonplace, and accepted as lowvoltage wiring in the National Electrical Code. The NEC was revised in 2014 to raise the long-acceptedthreshold of 600 V to 1000 V. While there have been proposals to raise this level to 2000 volts, theseproposals were not accept
12、ed as an across-the-board practice, with voltage limits of 1500 V morecommon in alternative energy applications. While this upper limit for low voltage wiring is evolving, theimpact to connectors is less dynamic, as the connector is not impacted by concerns such as switching.Since the NEC establishe
13、s that conductors operating above 2000 volts as the break-point at whichshielded cable is generally required (See NEC 310.10(E), this Certification Requirement Decision (CRD)establishes 2000 volts as the new limit for insulated connectors. The established limit of 35 000 volts foruninsulated connect
14、ors remains unchanged, but is consolidated in the clause with other voltage limits. The1000 volt rating for signs and luminaires remains with the specific marking for those applications, howeverit is no longer necessary to identify that rating in clause 1.4 as that value would fall within the range
15、of thenew ratings. This CRD also aligns with a CRD that accomplishes the same addition in UL 486C.This CRD provides rating break points at 1000 Volts (present NEC level for low voltage), 1500 Volts(more common break point for alternative energy applications), and 2000 volts (upper limit established
16、asnoted in the preceding paragraph). The test values for Puncture/Flashover in Table 28 are based on thefollowing:Puncture 4X Rated + 1000Flashover 10X Rated +1000The test values in Table 29 are based on a calculation of 40% of the Flashover test voltage from Table28. While this aligns with the exis
17、ting 300 V value, it is different than what is used for the 600 V value(which is 37.5% of the Flashover Test Voltage from Table 28). However, use of the 40% value is the moreconservative approach to an extension of the test values in Table 28 to the test values in Table 29.STANDARD NUMBER: UL 486A-4
18、86B -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCopyright 2016 UL LLCUL LLC, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue
19、 or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of UL LLC. in practically applying therequirements of the standard. They do not represent formal interpretations of the standard underAmerican National Standards Institute (ANSI) processes. UL L
20、LC shall not be responsible to anyone forthe use of or reliance upon Certification Requirement Decisions by anyone. UL LLC shall not incur anyobligation or liability for damages, including consequential damages, arising out of or in connection withthe use or reliance upon Certification Requirement D
21、ecisions. The electronic version of the CertificationRequirement 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 486A-486B -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSTANDARD NUMBER: UL 486A-486B -4-No Text on This Page
