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): PAQT, PASQ, PAQX, PAXW, PASD, PAQR, PAYKStandard Number: UL 1066Standard Title: Standard for Low-Voltage AC and DC Power Circuit Breakers Used inEnclosuresEdition Date: April 13, 2012Edition Number: 4
3、Section / Paragraph Reference: 1.7Subject: Increase voltage limit to 1000Vac and 1500VdcDECISION:1.7 These requirements cover equipment rated 6001000 V or less nominal, 635 1058 V maximum ac and300 1500 V maximum dc.RATIONALE FOR DECISION:With the change to the NEC, IEEE C37.13 the Standard for Low-
4、Voltage AC Power Circuit Breakers Usedin Enclosures, and C37.14 the Standard Low-Voltage DC (3200 V and below) Power Circuit BreakersUsed in Enclosures to allow up to 1000V for low voltage applications, requirements need to be revised forall low-voltage equipment to allow for the increased limit. Th
5、is proposal increases the limit from 600V to1000Vac and 1500Vdc.Copyright 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 or that they will be recognized or adoptedby an
6、yone. 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 LLC shall not be responsible to anyone forthe use
7、 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 Decisions. The electronic version of the Certific
8、ationRequirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSTANDARD NUMBER: UL 1066 -2-No Text on This Page
