UL 1993 CRD-2016 UL Standard for Safety Self-Ballasted Lamps and Lamp Adapters - Section Paragraph Reference 6 2 2 8 19 Subject Evaluation of tack-soldered electrical connections .pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL LLC CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared by UL LLC. It is normative for the applicable ULProduct Certification Program(s); however, it is curre

2、ntly not part of the UL Standard(s) referencedbelow.Product Category (CCN): OOLR, OOLVStandard Number: UL 1993Standard Title: Standard for Self-ballasted Lamps and Lamp AdaptersEdition Date: December 4, 2012Edition Number: 4Section / Paragraph Reference: 6.2.2, 8.19Subject: Evaluation of tack-solder

3、ed electrical connectionsDECISION:6.2.2 Where loosening or breaking of electrical connections involves a risk of fire or electric shock, theconnections shall be soldered, welded, or otherwise securely connected. A soldered joint shall bemechanically secure before soldering. A surface mount component

4、 not exceeding a maximum dimensionof 13 mm (0.5 in) need not comply with this requirement. Soldered joints that comply with 8.19 areconsidered to comply with this requirement.8.19 Evaluation of tack-soldered electrical connections8.19.1 Part A Loose connection8.19.1.1 To determine if a cracked or ot

5、herwise unreliable solder joint is capable of hazardous arcing, theconnection in question shall be subjected to the Arcing Test described in Supplement SD of UL 935,Standard for fluorescent ballasts.8.19.1.2 For the test, the conductor to the soldered joint shall be cut and connected to the arcing t

6、ester.If needed, wire with the same or larger gauge may be used to extend the conductors just enough tosecure to the testers wiring terminals.8.19.1.3 Three samples of each connection shall be tested in this fashion. The test results are consideredacceptable if they comply with SD2.1.1 in UL 935.8.1

7、9.2 Part B Random contact8.19.2.1 To determine if a loose conductor could cause a hazardous condition by contacting nearbysurfaces or electrical components, the conductor in question shall be disconnected from the solder jointand connected in turn to the various conductive surfaces and electrical co

8、mponents which it can physicallytouch should its soldered connection fail.8.19.2.2 As these are considered abnormal conditions, this is conducted under the same conditions as theLED lamp and driver abnormal conditions tests in SA8.22.8.19.2.3 The test results are considered acceptable if they do not

9、 indicate a risk of fire or electric shockas defined in SA8.22.2.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULRATIONALE FOR DECISION:Clause 6.2.2 requires solder connections to be physically secure if a loose or broken electrical connection

10、can potentially result in a fire or electric shock risk. This decision provides an alternative investigativeapproach to determine if these risks exist in a particular circuit.Part A is intended to determine the risk from arcing caused by a loose, intermittent or otherwise unreliableelectrical connec

11、tion. The UL 935 arcing tester is used create a gap in the connection. This apparatus waschosen since it is already used to determine if electrical arcing will occur between a fluorescent lamp andits lampholder in the event of the lamp becoming loose. The tester creates a gap between a threadedbrass

12、 rod and a piece of 0.003” thick brass foil at a rate of approx. 0.4mm per minute. The foil is used asthe test indicator. A hole formed in the foil would indicate evidence of potentially hazardous arcing andtherefore unacceptable results.Part B is intended to determine of a loose wire could come int

13、o contact with a conductive surface orelectrical component and result in an unacceptable risk of fire or electric shock. As part of the abnormalconditions test, the soldered connection is severed and the loose wire is connected to any conductivesurface or electrical component that it can physically

14、reach.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 anyone. Certification Requirement Decisions are the opinion

15、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 of or reliance upon Certification Requirement Decisions b

16、y 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 CertificationRequirement 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 1993 -2-