1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 498A Current Taps and Adapters STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHOR
2、IZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Current Taps and Adapters, UL 498A Second Edition, Dated January 23, 2008 SUMMARY OF TOPICS This revision was issued to incorporate the following changes. 1. Addition of requirements for child-appeali
3、ng or toy-like features 2. Addition of requirements to address the perimeter of a current tap enclosure to prevent single-pole insertion The revised requirements are substantially in accordance with Proposal(s) on this subject dated November 27, 2015 and April 15, 2016. Text that has been changed in
4、 any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or othe
5、rwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential,
6、 indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability f
7、or any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonab
8、le attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. JUNE 10, 2016 UL 498A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JUNE 10, 2016 U
9、L 498A tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 23, 2008 (Title Page Reprinted: June 10, 2016) 1 UL 498A Current Taps and Adapters First Edition December, 1999 Second Edition January 23, 2008 This ANSI/
10、UL Standard for Safety consists of the Second Edition including revisions through June 10, 2016. The most recent designation of ANSI/UL 498A as an American National Standard (ANSI) occurred on June 10, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Pa
11、ge. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed n
12、or electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 498A-2016UL COPYRIGHTED MATERIAL NOT AUTH
13、ORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JUNE 10, 2016 CURRENT TAPS AND ADAPTERS - UL 498A 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS 1 Scope .5 2 References .5 3 Glossary
14、 6A 4 Components 6B 5 Units of Measurement .7 6 Ratings 7 7 Markings .8B 7.1 Company name, catalog designation, electrical rating 8B 7.2 Multiple factories 8B 7.3 AC only devices .8B 7.4 Circuit limitations .9 7.5 Disconnecting use only 9 7.6 Adapters 9 7.7 Travel adapters 9 7.8 Devices with two set
15、s of line blades .10 7.9 Devices with supplementary overcurrent protection 10 7.10 Devices employing a decorative feature .10 7.11 Current taps intended for outdoor use .10A 7.12 Current tap with child-appealing or toy-like features .10B 8 Installation Instructions 10B 8.1 General .10B 8.2 Current t
16、aps .10B 8.3 Grounding adapters .11 8.4 Travel adapters .13 8.5 Current taps intended for outdoor use 14A 8.6 Adapters for dryer and range outlets .14A 8.7 Current tap with child-appealing or toy-like features 14A 9 General .14A 10 Insulating Materials .19 10.1 General .19 10.2 Flammability .19 10.3
17、 Electrical properties .20 10.4 Thermal properties .21 10.5 Vulcanized ber 22 10.6 Sealing compounds 22 10.7 Fuse enclosures .22 11 Enclosure 22 11.1 General .22 11.2 Male face size .25 11.3 Noninterchangeability obstructions 25 11.4 Female face size .27 11.5 Enclosure size .27 12 Current-Carrying P
18、arts 29 12.1 General .29 12.2 Blades 29 12.3 Contacts 29 13 Grounding and Dead Metal Parts .31 13.1 General .31 13.2 Blades 32 13.3 Contacts 34 14 Spacings 34 JUNE 10, 2016 CURRENT TAPS AND ADAPTERS - UL 498A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PE
19、RMISSION FROM UL 15 Assembly 34 15.1 General .34 15.2 Outlet separation .35 15.3 Grounding and polarization 35 15.4 Mating and interchangeability 36 15.5 Fuseholders 36A 15.6 Supplementary circuitry 36B 15.7 Supplementary overcurrent protectors .36B 16 Adapters .37 17 Travel Adapters .38A 17A Indoor
20、 or Outdoor or Indoor/Outdoor Current Taps that Employ Decorative Features .38A 17B Current Taps Employing Rotatable Outlets 38B 17C Current Taps Intended for Outdoor Use .38B 17D Current Tap with Child-Appealing or Toy-Like Features .38B 17D.1 Accessibility .38B 17D.2 Protection from electric shock
21、 .38B 17D.3 Enclosure of a current tap with child-appealing or toy-like features 38B 17D.4 Current tap with child-appealing or toy-like features - protection from personal injury .39 18 Representative Devices .40 19 Comparative Tracking Index Test .40C 20 Glow Wire Test .41 21 High-Current Arc Resis
22、tance to Ignition Test .41 22 Mold Stress Relief Test 43 23 Moisture Absorption Resistance Test 44 24 Dielectric Withstand Test 45 25 Accelerated Aging Tests .46 25.1 General .46 25.2 Rubber, EPDM, and TEE compounds .46 25.3 PVC compounds and copolymers 46 26 Insulation Resistance Test .47 27 Securi
23、ty of Blades Test 47 28 Contact Security Test .48 29 Retention of Plugs Test 48 30 Overload Test 49 31 Temperature Test .51 31A Accessible Temperature Test .52 32 Retention of Plugs Test (Repeated) 52A 32.1 General 52A 32.2 Plug retention 53 32.3 Plug withdrawal 53 33 Resistance to Arcing Test 54 34
24、 Fuseholder Temperature Test 54 35 Improper Insertion Test 56 35A Single-Pole Insertion Test 58 36 Grounding Contact Tests .58B 36.1 General 58B 36.2 Conditioning 58B 36.3 Continuity .60 36.4 Retention 61 37 Supplementary Overcurrent Protector Temperature Test .64 38 Obstruction Test 65 39 Separatio
25、n Test 67 40 Circuit Condition Indication Test 67 JUNE 10, 2016 CURRENT TAPS AND ADAPTERS - UL 498A 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 41 Leakage Current Test .68 42 Rotational Endurance Test .70 43 Resistance Test 70 44 Fault
26、Current .71 45 Test Series for Current Taps Intended for Outdoor Use .71 APPENDIX A Standards for ComponentsA1 JUNE 10, 2016 CURRENT TAPS AND ADAPTERS - UL 498A 4AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JUNE 11, 2013 CURRENT TAPS AND
27、 ADAPTERS - UL 498A 4B No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1 Scope 1.1 These requirements cover current taps and adapters for use in accordance with the National Electrical Code, ANSI/NFPA-70. 1.2 These requir
28、ements do not cover current taps or adapters rated at more than 200 A or for more than 600 V. See 6.1. 1.3 These requirements do not directly apply to current taps wired to exible cord or lampholder adapters but supplement the applicable standards. Lampholder adapters are covered in the Standard for
29、 Lampholders, UL 496. Current taps wired to exible cord are covered in the Standard for Attachment Plugs and Receptacles, UL 498. 1.4 These requirements do not cover cord-connected, relocatable power taps intended only for indoor use as a temporary extension of a grounding, alternating-current branc
30、h circuit for general use, and which are covered by the Standard for Relocatable Power Taps, UL 1363. 1.5 These requirements do not cover the current or voltage conversion circuitry capable of being used in travel adapters. 1.6 As used in this Standard, the term device is intended to refer to both c
31、urrent taps and adapters unless specically stated otherwise. 2 References 2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 2.2 The referenced standards include the followin
32、g: UL Standards UL 94 Tests for Flammability of Plastic Materials for Parts in Devices and Appliances UL 248-14 Low-Voltage Fuses Part 14: Supplemental Fuses UL 489 Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures UL 497A Secondary Protectors for Communications Circ
33、uits UL 4248-1 Fuseholders Part 1: General Requirements UL 4248-4 Fuseholders Part 4: Class CC UL 4248-5 Fuseholders Part 5: Class G JANUARY 23, 2008 CURRENT TAPS AND ADAPTERS - UL 498A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 424
34、8-6 Fuseholders Part 6: Class H UL 4248-8 Fuseholders Part 8: Class J UL 4248-9 Fuseholders Part 9: Class K UL 4248-11 Fuseholders Part 11: Type C (Edison Base) and Type S Plug Fuse UL 4248-12 Fuseholders Part 12: Class R UL 4248-15 Fuseholders Part 15: Class T UL 746A Polymeric Materials Short Term
35、 Property Evaluations UL 746B Polymeric Materials Long Term Property Evaluations UL 746C Polymeric Materials Use in Electrical Equipment Evaluations UL 746D Polymeric Materials Fabricated Parts UL 1077 Supplementary Protectors for Use in Electrical Equipment UL 1283 Electromagnetic Interference Filt
36、ers UL 1449 Surge Protective Devices UL 1659 Attachment Plug Blades for Use in Cord Sets and Power-Supply Cords UL 1681 Wiring Device Congurations ANSI Standards ANSI/NEMA WD6 Wiring Devices Dimensional Specications ANSI/NFPA 70 National Electrical Code JANUARY 23, 2008 CURRENT TAPS AND ADAPTERS - U
37、L 498A 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL ASTM Standards ASTM E 28 Standard Test Methods for Softening Point of Resins Derived from Naval Stores by Ring-and-Ball Apparatus ASTM D 570 Standard Test Method for Water Absorption of
38、 Plastics 2.3 The NEMA congurations of various attachment plug and receptacle combinations referenced in this Standard are in accordance with Wiring Devices Dimensional Specications, ANSI/NEMA WD6. The Figures referenced as Section C3 contain non-NEMA congurations and are found in the Standard for W
39、iring Device Congurations, UL 1681. 3 Glossary 3.1 For the purposes of this Standard, the following denitions apply. 3.2 ADAPTER A male and female contact device that adapts one blade or slot conguration to another (including a grounding adapter for a nongrounding receptacle). 3.3 ADAPTER, TRAVEL A
40、device that adapts the attachment plug of a portable appliance to permit its use on an electrical system that employs a male blade or pin conguration other than those found in Wiring Devices Dimensional Specications, ANSI/NEMA WD6 or the requirements for wiring device congurations, UL 1681. This inc
41、ludes adapters employing 2-pole, 2-wire and 2-pole, 3-wire blade or slot congurations rated 15 A, 125 V (1-15, 5-15) and blade or slot congurations other than found in ANSI/NEMA WD6 or UL 1681. See also 1.5. 3.3.1 CHILD-APPEALING OR TOY-LIKE FEATURES Features that provide visual appeal and attractio
42、n to children fourteen years or less in age. Features include but are not limited to the following: a) Products formed in the shape of a person, character or animal, and also having one of the features in Items (b) or (c); b) Products with readily identiable images or shapes of cartoon characters, s
43、imilar characters, or faces; c) Bright colors, sparkling blinking or ashing bright lights intended for amusement or decorative purposes and unrelated to operational or cautionary indicators or to cautionary identication; or d) Products formed in the shape of a toy, sports equipment, or scale model.
44、3.4 CONFIGURATION, LOCKING A device having a conguration that requires a motion other than a straight push or pull to connect or separate it when used with its mating part. 3.5 CONFIGURATION, MULTI- An outlet device conguration, commonly used in travel adapters, that is designed to mate with more th
45、an one attachment plug conguration. 3.6 CURRENT TAP A male and female contact device that, when connected to an outlet receptacle, provides multiple outlet congurations. JUNE 10, 2016 CURRENT TAPS AND ADAPTERS - UL 498A 6AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTIO
46、N WITHOUT PERMISSION FROM UL 3.7 ELECTRICAL (FUNCTIONAL) INSULATION The insulation necessary for the proper functioning of the product and for basic protection against electrical shock. This includes all parts relied upon to support live parts, all internal barriers necessary to maintain spacings, a
47、nd the outlet face portion of all female devices. 3.8 ENCLOSURE, ELECTRICAL That part of the device that renders inaccessible all or any parts of the device that are otherwise capable of presenting a risk of electric shock, retards propagation of ame initiated by electrical disturbances occurring wi
48、thin, or both. 3.9 GROUNDING DEVICE A device having a 5-15, 5-20, 5-30, 5-50, 6-15, 6-20, 6-30, 6-50, 7-15, 7-20, 7-30, 7-50, 14-15, 14-20, 14-30, 14-50, 14-60, 15-15, 15-20, 15-30, 15-50, 15-60, L5-15, L5-20, L5-30, L6-15, L6-20, L6-30, L7-15, L7-20, L7-30, L8-20, L8-30, L9-20, L9-30, L14-20, L14-3
49、0, L15-20, L15-30, L16-20, L16-30, L17-30, L21-20, L21-30, L22-20, L22-30, L23-20, L23-30, TT-R, or ML-2R conguration, the conguration illustrated in Figure C3.8, or a nonstandard conguration that employs one blade, pin, or contact exclusively for grounding. 3.10 GROUNDING PATH An electrically continuous path between the grounding pin, blade, or tab, and the grounding contact. 3.11 POLARIZED DEVICE A device constructed for connection to a mating devic
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