UL SUBJECT 2256-2001 Outline of Investigation for Nonmetallic Sheathed Cable Interconnects (Issue 1)《非金属护套电缆互连的调查大纲 发布编号 1》.pdf
《UL SUBJECT 2256-2001 Outline of Investigation for Nonmetallic Sheathed Cable Interconnects (Issue 1)《非金属护套电缆互连的调查大纲 发布编号 1》.pdf》由会员分享,可在线阅读,更多相关《UL SUBJECT 2256-2001 Outline of Investigation for Nonmetallic Sheathed Cable Interconnects (Issue 1)《非金属护套电缆互连的调查大纲 发布编号 1》.pdf(22页珍藏版)》请在麦多课文档分享上搜索。
1、June 29,2001 1 SUBJECT 2256 OUTLINE OF INVESTIGATION FOR NONMETALLIC SHEATHED CABLE INTERCONNECTS Issue Number 1 JUNE 29,2001 COPYRIGHT O 2001 UNDERWRITERS LABORATORIES INC. 2 SUBJECT 2256 JUNE 29,2001 No Text on This Page JUNE 29. 2001 SUBJECT 2256 3 CONTENTS FOREWORD 6 INTRODUCTION 1 Scope . 7 4 U
2、ndated References CONSTRUCTION 5 General 8 6 Materials . 8 6.1 Current-carrying parts . 8 7 Insulating Materials 8 7.1 Flammability . 8 7.2 Electrical properties . 9 7.3 Thermal properties 1 0 8 Assembly . IO 8.1 Accessibility of current-carrying parts 1 0 9 Spacings 10 PERFORMANCE 10 General 12 11
3、Pull Test . 12 12 Vibration and Temperature Test (Non-Insulation Displacement Terminals) 12 13 Heat Cycling and Vibration Test (Insulation Displacement Terminals) . 13 14 Fault Current Test 14 15 Dielectric Withstand Test 14 16 Flame Test . 15 17 Crush Test . 15 18 Mold Stress Relief Test 15 19 Over
4、load Test 16 20 Temperature Test . 17 21 Resistance to Arcing Test 17 22 Comparative Tracking Index Test . 17 23 Glow Wire Test 17 24 High-Current Arc Resistance to Ignition Test . 18 19 25 Moisture Absorption Resistance Test RATINGS 26 General 19 MARKINGS 27 General 20 4 SUBJECT 2256 JUNE 29,2001 A
5、PPENDIX A Standard for Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . AI 5 SUBJECT 2256 JUNE 29,2001 No Text on This Page 6 SUBJECT 2256 JUNE 29,2001 FOREWORD A. This Outline of Investigation contains basic requ
6、irements for products covered by Underwriters Laboratories Inc. (UL) under its Follow-Up Service for this category within the limitations given below and in the Scope section of this Outline of Investigation. They are subject to revision as further experience and investigation may show is necessary
7、or desirable. B. The observance of these requirements by a manufacturer is one of the conditions of the continued coverage of the manufacturer?s product. C. A product which complies with the text of this Outline of Investigation will not necessarily be judged to comply with the Outline of Investigat
8、ion if, when examined and tested, it is found to have other features which impair the level of safety contemplated by these requirements. D. A product employing materials or having forms of construction which conflict with specific requirements of the Outline of Investigation cannot be judged to com
9、ply with the Outline of Investigation. A product employing materials or having forms of construction not addressed by this Outline of Investigation may be examined and tested according to the intent of the requirements and, if found to meet the intent of this Outline of Investigation, may be judged
10、to comply with the Outline of Investigation. E. UL, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. The opinions and findings of UL represent its professional judgement given with due
11、consideration to the necessary limitations of practical operation and state of the art at the time the Outline of Investigation is processed. UL shall not be responsible to anyone for the use of or reliance upon this Outline of Investigation by anyone. UL shall not incur any obligation or liability
12、for damages, including consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon this Outline of Investigation. F. Many tests required by the Outline of Investigations of UL are inherently hazardous and adequate safeguards for personnel and property sha
13、ll be employed in conducting such tests. JUNE 29,2001 SUBJECT 2256 7 INTRODUCTION 1 Scope 1 .I These requirements cover interconnects consisting of mating insulating enclosures which are assembled to nonmetallic sheathed cable and form both a mechanical and electrical connection. This forms a contai
14、ned product for component interconnections for use in exposed or concealed locations in accordance with the National Electrical Code (NEC), ANSVNFPA-70, Article 545, Manufactured Buildings; Article 550, Mobile Homes; Article 551, Recreational Vehicles And Recreational Vehicle Parks, and for tap devi
15、ces in accordance with Article 336, Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS. 1.2 The enclosures of these interconnects are complete without openings and are intended for use without an outlet box or enclosure. 1.3 These requirements cover interconnects intended for use at 600 volts ac or
16、less on 15 and 20 ampere branch circuits wired with Nos. 14 and 12 AWG (2.1 and 3.3 mm2 ) copper conductors, respectively. 1.4 A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this Outline of Investigation
17、, and that involves a risk of fire or of electric shock or injury to persons, shall be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent of this Outline of Investigation. A product whose features, cha
18、racteristics, components, materials, or systems conflict with specific requirements or provisions of this Outline of Investigation does not comply with this Outline of Investigation. Revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revi
19、sion, and implementation of this Outline of Investigation. 2 Glossary 2.1 For the purposes of this Outline of Investigation, the following definitions apply. 2.2 ENCLOSURE - That part of the device that renders inaccessible any or all parts of the device that otherwise presents a risk of electric sh
20、ock, retards propagation of flame initiated by electrical disturbances occurring within , or bot h. 2.3 INSULATION PIERCING OR DISPLACEMENT CONNECTOR - Device intended to establish a connection between the device terminal contacts and one conductor or the interconnection of two or more conductors, b
21、y piercing, boring through, cutting through, removing, displacing, or making ineffective in some other manner the insulation of the conductor or conductors without previous stripping. 2.4 PRESSURE CABLE CONNECTOR -Device intended to establish a connection between the device terminal contacts and one
22、 or more conductors by means of mechanical pressure without the use of solder. a SUBJECT 2256 JUNE 29,2001 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 Any undated referenc
23、e to a code or standard appearing in the requirements of this Outline of Investigation shall be interpreted as referrring to the latest edition of the code or standard. CONSTRUCTION 5 General 5.1 All parts that act as the electrical insulation or enclosure of a device shall be made of an insulating
24、material rated for the particular application. These parts shall not employ hard rubber. 5.2 Vulcanized fiber is not prohibited from being used for insulating washers, separators, and barriers, but not as the sole support of current-carrying parts. The material shall be moisture-resistant in accorda
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