1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1666 Test for Flame Propagation Height of Electrical and Optical-Fiber Cables Installed Vertically in Shafts STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTIO
2、N OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Test for Flame Propagation Height of Electrical and Optical-Fiber Cables Installed Vertically in Shafts, UL 1666 Fifth Edi
3、tion, Dated February 16, 2007 Summary of Topics This revision to ANSI/UL 1666 is being issued to reect the reaffirmation of the ANSI approval of the Standard. No technical changes have been made to the document. The revisions are substantially in accordance with Proposal(s) on this subject dated Nov
4、ember 4, 2016. Text that has been changed in 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,
5、 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 be liable
6、 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 possibility of su
7、ch 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, liability, da
8、mage, 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. JANUARY 31, 2017 UL 1666 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBU
9、TION WITHOUT PERMISSION FROM UL JANUARY 31, 2017 UL 1666 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 16, 2007 (Title Page Reprinted: January 31, 2017) 1 UL 1666 Standard for Test for Flame Propagation Hei
10、ght of Electrical and Optical- Fiber Cables Installed Vertically in Shafts First Edition November, 1986 Second Edition January, 1991 Third Edition February, 1997 Fourth Edition November, 2000 Fifth Edition February 16, 2007 This ANSI/UL Standard for Safety consists of the Fifth Edition, including re
11、visions through January 31, 2017. The most recent designation of ANSI/UL 1666 as a Reaffirmed American National Standard (ANS) occurred on as an American National Standard (ANSI) occurred on January 31, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title
12、Page. 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 https:/. ULs Standards for Safety are copyrighted by UL. Neither a printe
13、d 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 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 1666-2012 (R2017)UL COPYRIGHTED MATERI
14、AL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 31, 2017 UL 1666 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Units of Measurement .4 P
15、ERFORMANCE 3 Fire Test Room .4 4 Fire Test Apparatus .4 4.1 Fire test chamber .4 4.2 Burner apparatus .5 4.3 Burner fan .8 4.4 Propane .8 4.5 Exhaust blower and duct 8 4.6 Temperature and ow measurement instrumentation 8 4.7 Data acquisition equipment .10 5 Specimen Conditioning 10 6 Determination o
16、f Specimen Diameter 10 7 Number of Cable Lengths 11 8 Test Procedure 11 REQUIREMENTS AND REPORT 9 Acceptance Criteria 12 10 Report 13 GUIDE TO MOUNTING METHODS 11 Introduction 13 12 Method .13 FEBRUARY 16, 2007 UL 1666 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION
17、WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 This is a re test for determining values of ame propagation height for electrical and optical-ber cables that are for installation vertically in shafts or in vertical runs that penetrate one or more oors. 1.1 revised June 27, 2012 1.2 The purpose o
18、f this test is to determine whether the ame propagation characteristics of these riser cables are in accordance with the National Electrical Code. 1.3 This test does not investigate the toxicity or corrosivity of the products of combustion or decomposition. 1.4 This test does not cover the construct
19、ion requirements for any cable or the electrical, optical, and other performance requirements for any cable. 2 Units of Measurement 2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. PERFORMANCE 3 Fire Test Room 3.1 The re tes
20、t room in which the chamber is located is to have provision for a free inow of air to maintain the room at a controlled pressure of 0 0.05 in (0 12 Pa) of water column with respect to barometric pressure and at a temperature of 73 5F (23 3C) and a relative humidity of 50 5 percent throughout each te
21、st. 4 Fire Test Apparatus 4.1 Fire test chamber 4.1.1 The test chamber is to be as shown in Figure 4.1. The test chamber, all equipment, and the cable specimens are to be protected from the wind and other conditions of weather that could affect the test results. The walls of the structure are to be
22、of standard concrete masonry nominally 8 in (203 mm) thick. The rst and second oors shall be constructed of reinforced normal-weight concrete nominally58i n (127 203 mm) thick. The roof shall be constructed of a suitable building construction capable of providing a tight seal with the walls of the s
23、tructure. A slot measuring 1 ft by 2 ft (305 mm by 610 mm) is to be located in the rst oor, and an identical slot is to be located directly above in the second oor. As shown in Figure 4.1, each slot is to be 8 in (203 mm) from the back wall of the room and 4 in (102 mm) from the side wall of the roo
24、m. The slots are to be oriented adjacent to either side wall of the room based on installation and position of the re test chamber. Windows are to be positioned as needed for observation. JUNE 27, 2012 UL 1666 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT P
25、ERMISSION FROM UL 4.1.2 The test chamber is to contain steel access doors located on the rst and second oors as shown in Figure 4.1 or positioned in any of the other walls. Positioning the second oor door or an additional access hatch in the wall opposite the slot is advantageous as this allows for
26、ease of installation of the cable specimens and positioning of second oor slot thermocouples. The size of each access is not specied. The edges of the door frames are to use an inorganic gasketing material to ensure a tight t of each door when closed to prevent excessive drafts in the chamber. This
27、is generated text for gtxt. 4.2 Burner apparatus 4.2.1 The burner is to consist of 1/2-in steel pipe with a 1/2-in pipe elbow, plus a steel burner diffusion plate as shown in Figure 4.2. The plate is to be located as shown in Figure 4.3. An electronic-spark igniter is to be positioned adjacent to th
28、e outlet of the gas-piping outlet for ignition of the pilot ame. 4.2.2 A propane-gas owmeter is to be installed in the piping feeding the burner for measuring the ow rate of gas during the test. The owmeter is to be capable of measuring a gas ow rate of 222 SCFH (standard cubic feet per hour) (1743
29、cm 3 /s). Measurements are to be accurate within 3 percent. This is generated text for gtxt. Figure 4.1 Fire test chamber FEBRUARY 16, 2007 UL 1666 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 4.2 Burner diffusion plate FEBRUARY 1
30、6, 2007 UL 1666 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 4.3 Location of ignition burner relative to oor slot and cables FEBRUARY 16, 2007 UL 1666 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTIO
31、N WITHOUT PERMISSION FROM UL 4.3 Burner fan 4.3.1 An electric blower fan capable of providing an air velocity across the burner outlet as specied in 8.3 is to be positioned outside the chamber perpendicular to the centerline of the burner as shown in Figure 4.1. A slot that is 6 in wide by 4 in high
32、 (152 mm by 102 mm) is to be provided in the wall of the test chamber at the rst oor level to enable the fan to move air across the burner. 4.4 Propane 4.4.1 The gas supplied to the burner is to be CP-grade propane having a nominal heating value of 2500 Btu (thermochemical) per cubic foot 93.0 MJ/m
33、3 or 22.2 kilocalories (thermochemical) per cubic meter. 4.5 Exhaust blower and duct 4.5.1 A steel exhaust duct is to be positioned in the center of the roof of the re test chamber as shown in Figure 4.1. An exhaust blower is to be connected to the exhaust duct. The blower is to have the capacity to
34、 maintain the required air velocity specied in 8.2 throughout the duration of the test. 4.6 Temperature and ow measurement instrumentation 4.6.1 Eight 28 AWG Type K thermocouples with an inconel sheath are to be located in the slot in the second oor, and one thermocouple is to be located in the rst
35、oor slot, as shown in Figure 4.4. 4.6.2 One 28 AWG Type K thermocouple with an inconel sheath is to be located at the centerpoint of the rst oor chamber ceiling and is to extend downward 1 1/16 in (25.4 1.6 mm) perpendicular to the ceiling. This thermocouple is used to determine the test chamber tem
36、perature prior to conducting a test. 4.6.3 A bi-directional air-velocity probe is to be located at the horizontal and vertical center () of the rst oor slot as shown in Figure 4.4. The velocity probe for ow measurements is to be connected to an electronic pressure gauge to obtain differential pressu
37、re. This is generated text for gtxt. FEBRUARY 16, 2007 UL 1666 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 4.4 Location of thermocouples in slot FEBRUARY 16, 2007 UL 1666 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPROD
38、UCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.7 Data acquisition equipment 4.7.1 A digital data acquisition system shall be used to collect and record the air inlet slot velocity and second oor slot thermocouple temperature at intervals of 5 seconds or less. 5 Specimen Conditioning 5.1 Prior t
39、o testing, all cable specimens are to be conditioned for a minimum of 24 h in a controlled environment of 73 5F (23 3C) and relative humidity of 50 5 percent. Samples which are supplied on reels shall have any wrapping materials removed before conditioning. 6 Determination of Specimen Diameter 6.1 U
40、se either a diameter tape, vernier caliper, or a micrometer with an accuracy of 0.001 in (0.025 mm) to measure the specimen diameter. 6.2 The diameter tape is appropriate for specimens that are uniformly round. Ensure that the tape is wrapped tightly around the specimen, but not so tight that the sp
41、ecimen is compressed. Use an arithmetic average of three readings overa1f t(0.3 m) length of the specimen as the specimen diameter. 6.3 The vernier caliper is appropriate for all sizes of cable specimens, and is especially useful for small diameter cables which are not uniform in cross section. 6.4
42、If the specimen is round, close the caliper gently around the cable being careful not to compress it and take the reading. Repeat the measurement a minimum of ve times over a length of 1 ft (0.3 m) of cable. The arithmetic average of the ve readings is used as the diameter of the cable specimen. 6.5
43、 If the specimen is not uniform in cross section, with the width to thickness ratio less than 2:1, take three measurements at the wide points, and three measurements at the narrow points of the specimen. The diameter is an arithmetic average of the six readings. 6.6 If the width to thickness ratio o
44、f the specimen is greater than 2:1, then the width of the specimen is taken as the specimen diameter. Measure the width of the specimen at six locations ona1f t(0.3 m) length of the cable. The specimen diameter is an arithmetic average of the six readings. 6.7 The micrometer is appropriate for a cab
45、le specimen with a uniform cross section. Take ve measurements of the specimen diameter overa1f t(0.3 m) length of the cable. The arithmetic average of the ve readings is the diameter of the cable specimen. FEBRUARY 16, 2007 UL 1666 10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION O
46、R DISTRIBUTION WITHOUT PERMISSION FROM UL 7 Number of Cable Lengths 7.1 The number (N) of cable lengths (rounded to the next lower whole number) to be used in a given test is to be determined by means of the following formula, N = 12/D in which: for round cables, D is the outside diameter of the cab
47、le in inches, and for non-round cables, D is the largest dimension of the cable diameter. 7.2 A guide for mounting cables is given in 11.1 12.5. 8 Test Procedure 8.1 Prior to testing each day, the test chamber is to be preheated by activating the exhaust blower and providing a propane ignition ame f
48、or 30 min using the specications in 8.5. 8.2 After preheating, and with the exhaust ow established, the temperature in the chamber is to be 100 20.0F (38 11C) as measured by the thermocouple positioned at the centerpoint of the rst oor chamber ceiling. The incoming air is to be at a temperature of 7
49、3 5F (23 3C) with a relative humidity of 50 5 percent. The cable specimens are to be installed and an exhaust air ow as measured at the slot in the rst oor is to be established at 3.5 0.5 m/s (11.5 1.6 ft/s). The air velocity in the slot is to be calculated as follows: in which: k is a constant for the bi-directional probe determined experimentally by calibrating the probe with a standard ow-measuring device, P is the pressure dif
