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): NITWStandard Number: UL 508AStandard Title: Standard for Industrial Control PanelsEdition Date: December 20, 2013Edition Number: 2Section / Paragraph Referen
3、ce: 1.2, 1.23, 52.6Subject: Industrial Control Panels for Load Management ApplicationsDECISION:1.2 These requirements also cover industrial control panel enclosures and industrial control panelsintended for flame safety supervision of combustible fuel type equipment, elevator control, crane or hoist
4、control, service equipment use, marine use, air conditioning and refrigeration equipment, equipment forload management applications, and for control of industrial machinery including metalworking machinetools, power press controls, and plastic injection molding machinery.1.23 Equipment intended to e
5、nergize or de-energize electrical loads to achieve the desired use ofelectrical power is covered by the Standard for Energy Management Equipment, UL 916.52.6 Industrial Control Panels including control circuitry which limit output current to a marked maximumload may be marked to indicate suitability
6、 of use in load management applications.RATIONALE FOR DECISION:Industrial control panels are routinely applied to manage loads in a specific application. Many of thoseapplications are described in the scope of 508A. Other applications exist that are not itemized, andincluding a provision for “load m
7、anagement applications” offers flexibility into uses where the load may becontrolled in a designed manner.These applications may be similar to the more defined type of controlled management whereby the loadsare controlled by a system to achieve the desired use of electrical power. Providing a refere
8、nce to the ULStandard for Energy Management Equipment provides a cross reference to the Standard that coversenergy management equipment.Copyright 2014 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Cert
9、ification 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. They do not represent formal interpretations of thestandard
10、 under American National Standards Institute (ANSI) processes. UL shall not be responsible toanyone for the 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 connecti
11、onwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertification Requirement Decision is the current version and previously printed copies may be outdated.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 508A -2-
