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): QPTZStandard Number: UL 13Standard Title: Standard for Power Limited Circuit CablesEdition Date: March 18, 2015Edition Number: 4Section / Paragraph Reference
3、 14.1.5. 14.3.1, Table 14.3Subject: Addition of Stainless Steel as a Welded and Corrugated Metal SheathDECISION:14.1.5 In the case of stainless steel sheathed cables, any outer jacket compound and any cable jacket,binder, separator or insulation material coming in direct contact with the stainless
4、steel armor shall notcontain chlorine.14.3 Welded and Corrugated Metal Sheath14.3.1 A welded and corrugated metal sheath shall be of an aluminum-base alloy having a copper contentof 0.40 percent or less, a stainless steel alloy having a chromium content of not less than 16 percent, acopper alloy, or
5、 a bronze alloy. The sheath shall be tightly formed around the underlying cable and shallbe welded and corrugated. The sheath shall be applied as indicated in 14.1.4. See 14.2.3.Table 14.3Minimum thickness at any point of unformed metal tape from which corrugated sheath is weldedor extrudedMetalCalc
6、ulated diameter under sheath Thickness of unformed metal tapeinches mm mils mmAluminum orStainless Steel0 2.180 0 55 22 0.56Over 2.180 but not over 3.190 Over 55 but not over 81 29 0.74Over 3.190 but not over 4.200 Over 81 but not over 107 34 0.87Bronze or electrolyticcopper0 2.365 0 60 17 0.43Over
7、2.365 but not over 3.545 Over 60 but not over 90 21 0.53Over 3.545 but not over 4.200 Over 90 but not over 107 25 0.64aThe insulation thickness used in calculating the diameter is to be the specified average insulation thickness where an averageis specified and is to be the specified minimum thickne
8、ss at any point of the insulation where an average thickness is notspecified.bThicknesses that are less than indicated in this table may be accepted based on performance of the sheath under therequirements for metal-clad cables in UL 1569.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTI
9、ON ORDISTRIBUTION WITHOUT PERMISSION FROM ULRATIONALE FOR DECISION:UL 13 currently permits a cable covered with a corrugated armor made of a copper-alloy tube,bronze-alloy tube or an aluminum-alloy tube. When the standard was written, it was not anticipated thatstainless steel armor would be used. S
10、ince this material is used to manufacture Electrical Rigid MetalConduit (UL 6A) and Liquid-Tight Flexible Metal Conduit (UL 360), and Metal Clad Cable-MC (UL1569)this material is being proposed to be added as an alternate armor in UL 13.Copyright 2015 Underwriters Laboratories Inc.UL, in performing
11、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 anyone. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically a
12、pplying the requirements of the standard. They do not represent formal interpretations of thestandard 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 incuran
13、y 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 theCertification 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 13 -2-
