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): KLDRStandard Number: UL 1042Standard Title: Standard for Electric Baseboard Heating EquipmentEdition Date: August 31, 2009Edition Number: 5Section / Paragrap
3、h Reference: 30.1Subject: Leakage Current TestDECISION:30.1 The leakage current of a cord-connected heater employing a standard attachment plug rated 20amperes or less shall be not more than:a) 0.5 milliampere for a heater having a nominal 120 volt rating, andb) 0.75 milliampere for a heater having
4、a nominal 208 or 240 volt rating.Exception: For a heater having a metal sheathed heating element, during the period beginning 5 secondsafter energization (closure of S1), the leakage current may exceed the value specified in (a) or (b) for aperiod not exceeding 5 minutes, but shall not exceed 2.5 mi
5、lliamperes. The 5-minute period is measuredduring the warm-up period and again during the cool-down period from the first excursion above the valueof (a) or (b) until the value is less than and remains less than the value in (a) or (b).RATIONALE FOR DECISION:Updated to include exception for the leak
6、age current value that exceeds the prescribed limits after the firstfive seconds, a common occurrence for metal sheathed heating elements. The same requirement existsin other air heater standards, UL 1278, Movable and Wall- or Ceiling-Hung Electric Room Heaters, andUL 2021, Fixed and Location-Dedica
7、ted Electric Room Heaters.Copyright 2014 Underwriters Laboratories Inc.UL, 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 anyone. Certificatio
8、n Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically applying 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 us
9、e 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 connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertificatio
10、n Requirement 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 1042 -2-No Text on This Page
