1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2250 Instrumentation Tray Cable STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHO
2、RIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Instrumentation Tray Cable, UL 2250 Third Edition, Dated March 30, 2017 SUMMARY OF TOPICS This new edition of ANSI/UL 2250 is being issued to revise requirements for metal coverings. The revisions ar
3、e substantially in accordance with Proposal(s) on this subject dated November 4, 2016. 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 otherwise without prior
4、 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, indirect or simila
5、r 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 for any damage ever
6、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 reasonable attorneys fees)
7、resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. MARCH 30, 2017 UL 2250 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 30, 2017 UL 2250 tr2 No Tex
8、t on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 30, 2017 1 UL 2250 Standard for Instrumentation Tray Cable First Edition December, 1996 Second Edition April, 2006 Third Edition March 30, 2017 This ANSI/UL Standard for Saf
9、ety consists of the Third Edition. The most recent designation of ANSI/UL 2250 as an American National Standard (ANSI) occurred on March 30, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title Page. Comments or proposals for revisions on any part of the S
10、tandard 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 https:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any w
11、ay. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 2250-2017UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PER
12、MISSION FROM UL MARCH 30, 2017 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 INTRODUCTION 1 Scope .5 2 Units of Measurement .6 3 References.6 CONSTRUCTION 4 Materials .6 5
13、 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 and application .10 13.2 Properties .12 13.3 Thicknesses .13 13.4 Individual covering15 14 Optical
14、-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 application .18 16.2 Properties .20 16.3 Thicknesses .20 17 Metal Covering .22 17.1 General .22 17.2 Sm
15、ooth metal sheath .22 17.3 Welded and corrugated metal sheath .23 17.4 Extruded and corrugated metal sheath 24 17.5 Interlocked armor.24 18 Jacket over Metal Covering 25 PERFORMANCE 19 Continuity Test of Conductors 26 20 Heat Shock and Flexibility Tests 27 20.1 Heat shock 27 20.2 Flexibility test 28
16、 21 Deformation Test .29 22 Cold Bend Test of Insulation .30 23 Cold Bend Test of Complete Cable .31 MARCH 30, 2017 INSTRUMENTATION TRAY CABLE - UL 2250 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 24 Spark Test after Insulating .32 25 D
17、ielectric Voltage-Withstand Test .32 26 Insulation Resistance Test at 60.0F (15.6C) 33 27 Test Procedure for Determining the Multiplying-Factor Column for Adjusting Insulation Resistance .36 28 Long Term Insulation-Resistance Test in Water 38 29 Sunlight Resistance Test 39 30 Crushing Test for Cable
18、 Marked for Direct Burial .39 31 Water Absorption Test of Insulation in Direct-Burial Cable .40 32 Impact Test for Type ITC Cable Marked -ER .41 33 Crushing Test for Type ITC Cable Marked -ER .42 34 Changes in Construction.43 35 Vertical-Tray Flame Tests on Cables 43 35.1 General .43 35.2 UL test 44
19、 35.3 FT4/IEEE 1202 test 44 35.4 Vertical-tray re and smoke-release test for cables with -LS marking45 36 Copper Sulphate Test of Zinc Coating on Steel Strip for and from Interlocked Steel Armor 45 37 Tension Test of Interlocked Armor 47 38 Flexibility Test for Cable Having Interlocked Armor or a Sm
20、ooth or Corrugated Metal Sheath .49 39 Durability Test of Ink Printing.50 MARKINGS 40 Intervals .50 41 Coding 50 42 Information on or in the Cable 51 43 Information on the Tag, Reel, or Carton .53 44 Multiple Markings .54 45 Date of Manufacture 55 MARCH 30, 2017 INSTRUMENTATION TRAY CABLE - UL 2250
21、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 cables consisting of two or more current-carrying copper or thermocouple alloy conductors with or without eit
22、her 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 are intended for use (optical and electrical functions associated in the case of a hybrid cable) on circuits ra
23、ted 150 V or less and5Aorless 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 for direct-burial are so marked. Jacketed Type ITC cables comply with one of the following 70,000 Btu/h (20.5
24、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 are not applicable) in the Standard for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical an
25、d 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 Exposure (smoke measurements are not applicable) in UL 1685. c) For limited-smoke cable, either the UL test or th
26、e 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 contains one or more electromagnetic shields may be surface marked or have a marker tape to indicate that it is
27、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 to the human body. 1.4 All Type ITC cables qualify for exposure to sunlight (a 720-hour sunlight-resistance te
28、st 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 through the jacket see 42.1(i). 1.5 These cables may have a metal sheath or armor over the required non/metalli
29、c 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-tight continuous sheath in the sense discussed in Sections 501.5 (D) and 501.5 (E) of the National Electrical Cod
30、e, ANSI/NFPA 70, (see 16.1.1). MARCH 30, 2017 INSTRUMENTATION TRAY CABLE - UL 2250 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 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
31、cable tray and equipment where the cables are supported and secured every 6 ft (1.8 m). 2 Units of Measurement 2.1 In addition to being stated in the inch/pound units that are customary in the USA, each of the requirements in this Standard is also stated in units that make the requirement convenient
32、ly usable in countries employing the various metric systems (practical SI and customary). Equivalent although not necessarily exactly identical results are to be expected from applying a requirement in USA or metric terms. Equipment calibrated in metric units is to be used when a requirement is appl
33、ied 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 Reference Standard for Electrical Wires, Cables, and Flexible Cords, UL 1581. CONSTRUCTION 4 Materials 4.1 Each material used in a cable shall be
34、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 construction details, test performance, and markings. 5 Conductors 5.1 The conductors shall be of soft-annealed copper or thermocouple alloy.
35、 Soft-annealed copper shall comply with ASTM B3. A metal coating that is provided on soft-annealed copper, in compliance with Section8shallbeoftincomplyingwithASTMB33,ofatin/leadalloycomplyingwithASTMB189,ofnickel complying with ASTM B355, of silver complying with ASTM B298 or of another metal or al
36、loy (evaluation required). Thermocouple alloys are not specied. 5.2 Each conductor shall be continuous throughout the entire length of the nished cable see test in 19.1 and 19.2. MARCH 30, 2017 INSTRUMENTATION TRAY CABLE - UL 2250 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR D
37、ISTRIBUTION WITHOUT PERMISSION FROM UL 6 Size, Temper, and Assembly 6.1 Conductors shall be solid or stranded 22 12 AWG copper or solid 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
38、(g). The conductor in a thermocouple-extension wire is not required to comply with a diameter or resistance value. 7 Conductor Diameter 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 an
39、d 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 Table 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 o
40、f 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 to 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
41、and each of the individual strands of a stranded conductor shall be separately covered with a metal or alloy coating complying with 5.1 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 w
42、hich a metal coating is not required for corrosion protection. 8.3 The maximum temperature rating of the cable is not specied relative to 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
43、 be used in a cable with a temperature rating higher than indicated in Table 8.1. MARCH 30, 2017 INSTRUMENTATION TRAY CABLE - UL 2250 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 8.1 Maximum temperature rating of cable relative to
44、diameter and coating of solid copper conductor or of copper conductor strands Metal coating of copper strands or of solid copper conductor 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
45、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 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 sh
46、all not be considered to be part of the required insulation. 9.2 A separator used between a conductor and insulation shall be colored or 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 y
47、ellow 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 conduct
48、or is to be made by separately joining each individual wire, or is to be made by machine brazing or welding of the conductor as a whole provided that the resulting solid section of the stranded conductor is not longer than 1/2 in or 13 mm, there are no sharp points, and the distance between brazes o
49、r welds in a single conductor does not average less than 3000 ft or 915 m in any reel length of insulated single conductor. A joint made before insulation is applied to a conductor shall not increase the diameter of the solid conductor or individual wire (strand). The insulation applied to joints after insulating shall be equivalent to that removed and shall comply with the requirements in this Standard. 11 Resistance 11.1 The direct-current resistance of any length of condu
