1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2250 Instrumentation Tray CableUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER RE
2、PRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Instrumentation Tray Cable, UL 2250 Second Edition, Dated April 3, 2006 SUMMARY OF TOPICS Revision pages have been issued for the Standard for Instrumentation Tray Cable, UL 2250, to reect the reaffirmation of the ANSI
3、approval. No changes in requirements have been made. The revisions are substantially in accordance with Proposal(s) on this subject dated September 12, 2014. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, ele
4、ctronic, mechanical photocopying, recording, or otherwise 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 b
5、e liable for any special, incidental, consequential, 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 possibili
6、ty of such damage. In no event shall ULs liability for 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, liabi
7、lity, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tab
8、les, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREM
9、ENTS notice. The following table lists the future effective dates with corresponding item. NOVEMBER 3, 2014 UL 2250 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Future Effective Date References April 1, 2010 32.2, 33.2 NOVEMBER 3, 2014
10、 UL 2250 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 3, 2006 (Title Page Reprinted: November 3, 2014) 1 UL 2250 Standard for Instrumentation Tray Cable First Edition December, 1996 Second Edition April 3, 2006 This ANSI/UL Stand
11、ard for Safety consists of the Second Edition including revisions through November 3, 2014. The most recent designation of ANSI/UL 2250 as an American National Standard (ANSI) occurred on November 3, 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, o
12、r effective date information. 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
13、by UL. Neither a printed nor 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 2014 UNDERWRITERS LABORATORIES INC. ANSI/UL 2250-2009 (R201
14、4)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 3, 2009 INSTRUMENTATION TRAY CABLE - UL 2250 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS
15、 INTRODUCTION 1 Scope .5 2 Units of Measurement .6 3 References .6 CONSTRUCTION 4 Materials .6 5 Conductors .6 6 Size, Temper, and Assembly .7 7 Conductor Diameter and Cross-Sectional Area .7 8 Metal Coating 7 9 Separator 8 10 Joints .8 11 Resistance 8 12 Stranding 10 13 Insulation 10 13.1 Material
16、and application .10 13.2 Properties .12 13.3 Thicknesses .13 13.4 Individual covering 15 14 Optical-Fiber Member(s) .15 15 Assembly 16 15.1 Optical-ber member(s) .16 15.2 Circuit and grounding conductors .16 15.3 Fillers .17 15.4 Binders .18 15.5 Shield .18 16 Overall Jacket .18 16.1 Material and ap
17、plication .18 16.2 Properties .19 16.3 Thicknesses .20 17 Metal Covering .21 17.1 General .21 17.2 Smooth metal sheath .22 17.3 Welded and corrugated metal sheath .23 17.4 Extruded and corrugated metal sheath 23 17.5 Interlocked armor .23 18 Jacket over Metal Covering 25 PERFORMANCE 19 Continuity Te
18、st of Conductors 25 20 Heat Shock and Flexibility Tests 26 20.1 Heat shock 26 20.2 Flexibility test 27 21 Deformation Test .28 22 Cold Bend Test of Insulation .29 23 Cold Bend Test of Complete Cable .30 NOVEMBER 3, 2009 INSTRUMENTATION TRAY CABLE - UL 2250 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
19、 FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 24 Spark Test after Insulating .31 25 Dielectric Voltage-Withstand Test .31 26 Insulation Resistance Test at 60.0F (15.6C) 32 27 Test Procedure for Determining the Multiplying-Factor Column for Adjusting Insulation Resistance .35 28 Lo
20、ng Term Insulation-Resistance Test in Water 37 29 Sunlight Resistance Test 38 30 Crushing Test for Cable Marked for Direct Burial .38 31 Water Absorption Test of Insulation in Direct-Burial Cable .39 32 Impact Test for Type ITC Cable Marked -ER .40 33 Crushing Test for Type ITC Cable Marked -ER .41
21、34 Changes in Construction .42 35 Vertical-Tray Flame Tests on Cables 42A 35.1 General 42A 35.2 UL test 43 35.3 FT4/IEEE 1202 test 43 35.4 Vertical-tray re and smoke-release test for cables with -LS marking 44 36 Copper Sulphate Test of Zinc Coating on Steel Strip for and from Interlocked Steel Armo
22、r . .44 37 Tension Test of Interlocked Armor 46 38 Flexibility Test for Cable Having Interlocked Armor or a Smooth or Corrugated Metal Sheath .48 39 Durability Test of Ink Printing .49 MARKINGS 40 Intervals .49 41 Coding 49 42 Information on or in the Cable 50 43 Information on the Tag, Reel, or Car
23、ton .52 44 Multiple Markings .53 45 Date of Manufacture 54 MAY 20, 2009 INSTRUMENTATION TRAY CABLE - UL 2250 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover Type ITC instrumentation control
24、cables consisting of two or more current-carrying copper or thermocouple alloy conductors with or without either or both: a) Grounding conductor(s), bare or insulated, and b) One or more optical-ber members, all under an overall jacket. These electrical and composite electrical/optical-ber cables ar
25、e intended for use (optical and electrical functions associated in the case of a hybrid cable) on circuits rated 150 V or less and5Ao rless in accordance with Article 727 and other applicable parts of the National Electrical Code (NEC). 1.2 These cables are rated 300 V but are not so marked. Cables
26、for direct-burial are so marked. Jacketed Type ITC cables comply with one of the following 70,000 Btu/h (20.5 kW) vertical-tray ame tests: a) The UL test referenced in 35.2.1 35.2.2 of these requirements. These paragraphs apply the test method described as the UL Flame Exposure (smoke measurements a
27、re not applicable) in the Standard for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables, UL 1685. b) The FT4/IEEE 1202 test referenced in 35.3.1 of these requirements. This paragraph applies the test method described as the FT4/IEEE 1202 Type of Flame Exp
28、osure (smoke measurements are not applicable) in UL 1685. c) For limited-smoke cable, either the UL test or the FT4/IEEE 1202 test referenced in 35.4.1 and 35.4.2 of these requirements. These paragraphs apply the test methods described in UL 1685 with smoke measurements included. 1.3 A cable that co
29、ntains one or more electromagnetic shields may be surface marked or have a marker tape to indicate that it is shielded . A cable that contains one or more optical-ber members has -OF supplementing the type letters and is limited (see 14.3) to carrying optical energy that has been ruled not hazardous
30、 to the human body. 1.4 All Type ITC cables qualify for exposure to sunlight (a 720-hour sunlight-resistance test is required see 29.1). A marking is not required; however, where used, the marking consists of sun res or sunlight resistant on the tag and either on the overall cable jacket or legible
31、through the jacket see 42.1 (i). 1.5 These cables may have a metal sheath or armor over the required non/metallic jacket. 1.6 These requirements do not cover the optical or other performance of any optical-ber member or group of such members. 1.7 The overall jacket on Type ITC cable is a gas/vapor-t
32、ight continuous sheath in the sense discussed in Sections 501.5 (D) and 501.5 (E) of the National Electrical Code, ANSI/NFPA 70, (see 16.1.1). APRIL 3, 2006 INSTRUMENTATION TRAY CABLE - UL 2250 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM U
33、L 1.8 Cables that are surface marked -ER are for use as exposed runs of not more than 50 ft (15.2 m) between a cable tray and equipment where the cables are supported and secured every 6 ft (1.8 m). 1.8 effective October 3, 2006 2 Units of Measurement 2.1 In addition to being stated in the inch/poun
34、d units that are customary in the USA, each of the requirements in this Standard is also stated in units that make the requirement conveniently usable in countries employing the various metric systems (practical SI and customary). Equivalent although not necessarily exactly identical results are to
35、be expected from applying a requirement in USA or metric terms. Equipment calibrated in metric units is to be used when a requirement is applied in metric terms. 3 References 3.1 Wherever the designation UL 1581 is used in this Standard, reference is to be made to the designated part(s) of the Refer
36、ence Standard for Electrical Wires, Cables, and Flexible Cords, UL 1581. CONSTRUCTION 4 Materials 4.1 Each material used in a cable shall be compatible with all of the other materials used in the cable. 4.2 Instrumentation tray cable shall comply in all respects with the applicable requirements for
37、construction details, test performance, and markings. 5 Conductors 5.1 The conductors shall be of soft-annealed copper or thermocouple alloy. Soft-annealed copper shall comply with ASTM B 3. A metal coating that is provided on soft-annealed copper, in compliance with Section 8 shall be of tin comply
38、ing with ASTM B 33, of a tin/lead alloy complying with ASTM B 189, of nickel complying with ASTM B 355, of silver complying with ASTM B 298 or of another metal or alloy (evaluation required). Thermocouple alloys are not specied. 5.2 Each conductor shall be continuous throughout the entire length of
39、the nished cable see test in 19.1 and 19.2. APRIL 3, 2006 INSTRUMENTATION TRAY CABLE - UL 2250 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6 Size, Temper, and Assembly 6.1 Conductors shall be solid or stranded 22 12 AWG copper or solid
40、size 22 12 AWG thermocouple alloy. The sizes of thermocouple-extension wire are nominal and are intended only for use in the cable marking that is described in 42.1(g). The conductor in a thermocouple-extension wire is not required to comply with a diameter or resistance value. 7 Conductor Diameter
41、and Cross-Sectional Area 7.1 The diameter of a solid conductor shall not be smaller than indicated in Table 20.1 of UL 1581 when determined as described in 200.1 and 200.2 of UL 1581. The cross-sectional area of a stranded conductor shall not be smaller than indicated in the 0.98X nominal column Tab
42、le 20.1 of UL 1581 when determined as required in 7.2. 7.2 The cross-sectional area of a stranded conductor is to be determined either: a) As the sum of the areas of its component strands, or b) By the weight method outlined in 210.1 210.4 of UL 1581. 8 Metal Coating 8.1 If the insulation adjacent t
43、o a conductor is of a material that corrodes unprotected copper in the test in 500.1 of UL 1581, and if a protective separator is not provided, the solid conductor and each of the individual strands of a stranded conductor shall be separately covered with a metal or alloy coating complying with 5.1
44、as applicable to the nished wire type. 8.2 Use of a metal coating is not specied on a solid conductor or the individual wires (strands) of a stranded conductor on which a metal coating is not required for corrosion protection. 8.3 The maximum temperature rating of the cable is not specied relative t
45、o the diameter of copper wires used in the serving, wrap, or braid shielding described in 15.5.2(b). Otherwise, copper strands and solid copper conductors shall not be used in a cable with a temperature rating higher than indicated in Table 8.1. APRIL 3, 2006 INSTRUMENTATION TRAY CABLE - UL 2250 7UL
46、 COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 8.1 Maximum temperature rating of cable relative to diameter and coating of solid copper conductor or of copper conductor strands Metal coating of copper strands or of solid copper conducto
47、r Diameter of each strand or of the solid conductor Smaller than 0.015 in or 0.38 mm At least 0.015 in or 0.38 mm Uncoated or coated with tin or a tin/ lead alloy 150C (302F) 200C (392F) Coated with silver 200C (392F) 200C (392F) Coated with nickel Over 200C (392F) Over 200C (392F) 9 Separator 9.1 A
48、 separator is acceptable between the conductor and the insulation of a solid or stranded wire or cable, but is not required. A separator shall be insulating but shall not be considered to be part of the required insulation. 9.2 A separator used between a conductor and insulation shall be colored or
49、shall be opaque to make the separator clearly distinguishable from the conductor once the insulation is removed. The color shall be other than green or green and yellow and may be solid, striped, or in some other pattern. 10 Joints 10.1 A joint in a solid conductor or in one of the individual wires of a stranded conductor shall be made in a workmanlike manner, shall be essentially smooth, and shall not have any sharp projections. A joint in a stranded conductor
