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 486CStandard Title: Standard for Splicing Wire ConnectorsEdition Date: January 11, 2013Edition Number: 6Section / Paragraph Reference: 1.5, 10.4, 10.5, Table 2, Table 22S
3、ubject: Increase Voltage Ratings to 2000 VoltsDECISION:1.5 This Standard does not apply to:a) insulated splicing wire connectors intended for use at voltage levels in excess of 2000 600 V1000 V in a sign or luminaire;b) terminal wire connectors;c) wire binding screw terminals;d) built-in terminal co
4、nnectors on devices rated less than 30 A and intended for outlet boxmounting or having provision for stress relief;e) built-in terminal connectors on devices having integral cable clamps;f) flat quick connect terminals; andg) soldering lugs.10.4 A connector that accommodates a single conductor in an
5、 opening shall be marked with the followingor equivalent wording, as applicable:a) “CU” for copper conductor only;b) “AL” for aluminum conductor only;c) “AL-CU” or “CU-AL” for aluminum, copper-clad aluminum, and copper conductor;d) for an insulated connector, the marked voltage rating shall be: “300
6、 volts maximum”, “600volts maximum”, 1000 volts maximum, 1500 volts maximum, 2000 volts maximum, or “600volts maximum, building wiring; 1000 volts maximum, signs or luminaires”. The marking may beon the unit container or on an information sheet packed in the unit container; ande) the operating tempe
7、rature rating for which the insulated connector has been found capable ofbeing used. See also 10.14 d).UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10.5 The unit container or an information sheet packed in the unit container of a connector
8、thataccommodates two or more conductors in the same opening shall be marked with the following orequivalent wording, as applicable:a) “CU” for copper conductor onlyb) “AL” for aluminum conductor only;c) “AL-CU” or “CU-AL” for copper to copper, or copper-clad aluminum to copper-clad aluminum,or alumi
9、num to aluminum conductor, but not intermixed;d) “AL-CU (intermixed dry locations)” or “CU-AL (intermixed dry locations)” for copper toaluminum conductor; for copper-clad aluminum to copper; and for copper-clad aluminum toaluminum;e) for an insulated connector, the marked voltage rating shall be: “3
10、00 volts maximum”, “600volts maximum”, 1000 volts maximum, 1500 volts maximum, 2000 volts maximum, or “600volts maximum, building wiring; 1000 volts maximum, signs or luminaires”. The marking may beon the unit container or on an information sheet packed in the unit container;f) with the operating te
11、mperature rating for which the insulated connector has been foundcapable of being used. See also 10.14 d); andg) with the complete or a partial list of intended conductor combinations.Table 2 - Insulation puncture and flashover test voltages, Tests A and B(Clauses 6.3.6, 9.5.2.4, 9.5.3.1, and 9.5.3.
12、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 0001000 5 000 11 0001500 7 000 16 0002000 9 000 21 000STANDARD NUMBER: UL 486C -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION O
13、RDISTRIBUTION WITHOUT PERMISSION FROM ULTable 22 - 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 greater than
14、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 accepted as an ac
15、ross-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 establishes that cond
16、uctors 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 splicing wire connectors. The 1000 volt rating for signsand luminaires remains with
17、 the specific marking for those applications, however it is no longer necessaryto identify that rating in clause 1.5 as that value would fall within the range of the new ratings. This CRDalso aligns with a CRD that accomplishes the same addition in UL 486A-486B.This CRD provides rating break points
18、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 asnoted in the preceding paragraph). The test values for Puncture/Flashover in Table 2 are based on thefollowing:Puncture 4X Rated + 100
19、0Flashover 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 existing 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). Howe
20、ver, 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 22.Copyright 2016 UL LLCUL LLC, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requireme
21、nt Decisions it may issue 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 Institu
22、te (ANSI) processes. UL LLC 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 Ce
23、rtification Requirement Decisions. The electronic version of the CertificationRequirement Decision is the current version and previously printed copies may be outdated.STANDARD NUMBER: UL 486C -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULThis document is published as a service to ULs certification customersSTANDARD NUMBER: UL 486C -4-
