IEEE 1202-2006 en Flame-Propagation Testing of Wire and Cable《火焰传播 电线和电缆试验》.pdf

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1、IEEE Std 1202-2006(Revision of IEEE Std 1202-1991)IEEE Standard for Flame-PropagationTesting of Wire and CableI E E E3 Park Avenue New York, NY 10016-5997, USA14 September 2006IEEE Power Engineering SocietySponsored by theInsulated Conductors CommitteeIEEE Std 1202TM-2006(R2012) (Revision of IEEE St

2、d 1202-1991) IEEE Standard for Flame-Propagation Testing of Wire and Cable Sponsor Insulated Conductors Committee of the IEEE Power Engineering Society Reaffirmed 5 December 2012 Approved 8 June 2006 IEEE-SA Standards Board Reaffirmed 28 October 2014Approved 18 October 2006 American National Standar

3、ds InstituteAbstract: Standardization of cable flame propagation testing is beneficial to cable manufacturers, distributors, and users. Uniform procedures; consistent, repeatable results; and measurable test acceptance criteria are required to allow comparisons among competing products and to allow

4、selection of the correct product for the application. Keywords: 20 kW, 20 min, 70 000 Btu/h, after burn, cable, char, charring, flame propagation, test protocol, vertical cable tray, wire _ The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyri

5、ght 2006 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 14 September 2006. Printed in the United States of America. IEEE is a registered trademark in the U.S. Patent +1 978 750 8400. Permission to photocopy portions of any individual standard for educat

6、ional classroom use can also be obtained through the Copyright Clearance Center. Introduction This introduction is not part of IEEE Std 1202-2006, IEEE Standard for Flame-Propagation Testing of Wire and Cable. This standard provides a test procedure for determining wire and cable flame propagation c

7、haracteristics due to ignition sources either outside of or within the cable system. The purpose of this revision is to update the standard to current industry practices and to harmonize this document with similar vertical tray flame test standards, such as UL 1685 and CSA C22.2 No. 22.2 No. 0.3-01

8、(R2005), FT4. This standard is not meant to determine circuit integrity or fire stop capability of wire or cable systems. This standard is also not meant to determine the protection afforded to cables by tray covers, conduits, or fire barrier materials. These considerations are covered in other more

9、 appropriate standards. This standard may be used to satisfy wire and cable flame propagation requirements identified in National Electrical Code(NEC) (NFPA 70-2005); CSA Standard C22.1-06, Canadian Electrical Code (CEC), Part I; or Mexican NOM-001 (MEC), Aparatos Electronicos de Uso Domestico Alime

10、ntados por Diferentes Fuentes de Energia Electrica. This standard is referenced in other standards such as IEEE Std 383TM-2003 and IEEE Std 1580TM-2001. This standard has been coordinated with Underwriters Laboratories (UL), the Canadian Standards Association (CSA), and Mexicos SDO Association of St

11、andardization and Certification (ANCE) as part of the tri-national harmonization process. Even though the IEEE is not formally part of the harmonization group, the content of this standard has been reviewed to achieve common technical requirements. Notice to users Errata Errata, if any, for this and

12、 all other standards can be accessed at the following URL: http:/ standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check this URL for errata periodically. Interpretations Current interpretations can be accessed at the following URL: http:/standards.ieee.org/reading/

13、ieee/interp/ index.html. Patents Attention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights. By publication of this standard, no position is taken with respect to the existence or validity of any patent rights in connection

14、therewith. The IEEE shall not be responsible for identifying patents or patent applications for which a license may be required to implement an IEEE standard or for conducting inquiries into the legal validity or scope of those patents that are brought to its attention. iv Copyright 2006 IEEE. All r

15、ights reserved. Participants The Wire and Cable Fire Propagation Working Group of the Maintenance, Operation however, the air intake opening size is critical.) 2Steel-framed door with wired-glass window for access and observation. The size of the door should be a standard commercial door size such a

16、s trade size 36 84 in or the equivalent metric trade size such as 1 2 m. 3Steel-framed wired-glass observation window(s) nominally 450 mm (18 in) square, located on a side wall of the chamber (see 4.1.2). 4Truncated-pyramid stainless-steel hood; each side is sloped approximately 40. 5Collection box

17、with exhaust duct centered on one side. The box shall be a cube with each face a 910 mm 15 mm (36 in 0.5 in) square. 6Tray mounted vertically in the center of the enclosure. 7Air-intake openings. 8Steel baffle that is nominally 610 mm 610 mm (24 in 24 in) and 3.2 mm (0.125 in) thick. 9Duct that is 4

18、05 mm 15 mm (16 in 0.5 in) inside diameter. 10Lighting (optional). 11Flame height gauge (optional). 12Temperature probe (Type K thermocouple with inconel sheath). 13Bidirectional velocity probe. 14Photoelectric cell and light source for smoke density measurement (optional). 15Control cabinet(s) for

19、bidirectional velocity probe, thermocouple, light source, and photoelectric cell (optional). 16Ribbon burner. Figure 1 Flame test enclosure IEEE 1202-2006 IEEE Standard for Flame-Propagation Testing of Wire and Cable 4 Copyright 2006 IEEE. All rights reserved. The enclosure shown in Figure 1 is reco

20、mmended for new construction. Other enclosures shall be permitted to be used if they are shown to provide equivalent results and are of a size such that the internal volume of the enclosure, exclusive of the pyramid hood, shall not be less than 14.5 m3(512 ft3) nor greater than 36 m3 (1272 ft3), the

21、 floor area shall not be less than 6 m2(64 ft2) nor greater than 9 m2(97 ft2), and the maximum air movement within the enclosure complies with 4.3. In the event of dispute, the results of tests conducted in an enclosure sized as shown in Figure 1 shall be final. 4.1.1 Enclosure walls The walls of th

22、e enclosure should be constructed of concrete masonry materials complying with ASTM C90-2005.8The interior surface of the walls shall be painted flat black. Alternative construction materials are acceptable for the enclosure walls provided the construction materials are capable of withstanding the h

23、igh temperatures and open flame within the test enclosure. 4.1.2 Windows For observation of the fire test, windows should be located in the walls and door, as shown in Figure 1. The exact location, size, and number of windows are not critical to test performance provided that all windows are air-tig

24、ht. It is suggested that the total surface area of the windows should not exceed 1.8 m2 (20.0 ft2). Exercise caution in selecting the window materials and construction to withstand the high temperatures and open flame within the test enclosure. 4.1.3 Air intakes Air intakes shall be provided at the

25、base of two opposite walls. The total cross-sectional area of the air intakes shall be 1.45 m2 0.03 m2(15.63 ft2 35 ft2), and the intake areas shall be divided approximately equal. Figure 1 shows dimensions for the air intakes installed in walls with and without an access door. Air intakes shall not

26、 be permitted in either of the other two walls. 4.1.4 Access door The enclosure shall contain an access door, typically constructed of steel, located as shown in Figure 1. The door shall be permitted to be located in any of the four walls. The sides and top of the door shall be adequately sealed to

27、prevent drafts. The bottom of the door shall also be sealed to prevent drafts if it is not located in a wall containing an air intake. 4.1.5 Exhaust hood A hood, formed as shown in Figure 1, shall be located on top of the enclosure walls. The area between the hood and the walls shall be sealed. 4.1.

28、6 Collection box A 910 mm 910 mm 910 mm with tolerance of 15 mm on each side (36 in 36 in 36 in with a tolerance of 0.5 in on each side) stainless steel collection box shall be located on top of the exhaust hood as shown in Figure 1. 8Information on references can be found in Clause 2. IEEE 1202-200

29、6 IEEE Standard for Flame-Propagation Testing of Wire and Cable 5 Copyright 2006 IEEE. All rights reserved. 4.2 Exhaust duct The exhaust duct connected to the collection box on top of the hood shall be a 405 mm 15 mm (16 in 0.5 in) nominal inside diameter steel pipe installed horizontally. A variabl

30、e-speed exhaust fan shall be located at the exhaust end of the duct. The exhaust duct shall be provided with instruments to measure gas velocity and temperature. A bidirectional probe or an equivalent measuring system shall be used to measure pressure in the duct. The probe shall be located in the e

31、xhaust duct at least 4.9 m (16 ft) but not more than 13.7 m (45 ft) from the centerline of the collection box. The minimum length between any bend and the probe shall be at least 10 times the inside diameter of the duct. The probe, shown in Figure 2, shall consist of a stainless steel cylinder with

32、a solid diaphragm in the center that divides the probe into two chambers. The probe shall have a length nominally two times the outside diameter of the cylinder with a minimum length of 25.4 mm (1.0 in) and a maximum length of 51 mm (2.0 in). The pressure taps on either side of the diaphragm support

33、 the probe. The axis of the probe shall be along the centerline of the duct. The taps shall be connected to a pressure transducer that shall be able to resolve pressure differences of 0.25 Pa (0.001 in of water). A bare bead, high-temperature Type K thermocouple, 0.51 mm (20 mils) in diameter, shall

34、 be located 152 mm (6 in) upstream from the bidirectional probe. Figure 2 Bidirectional probe 4.3 Air movement within the enclosure The maximum air movement within the enclosure, with only the intake and exhaust openings open, the exhaust fan on, if applicable, and the burner off, shall not exceed 1

35、 m/s (3.3 ft/s), as measured by a vane-type anemometer in the following areas: a) At the floor level where the burner will be positioned during the test b) 1.5 m (4.9 ft) above the enclosure floor where the cable tray will be positioned during the test IEEE 1202-2006 IEEE Standard for Flame-Propagat

36、ion Testing of Wire and Cable 6 Copyright 2006 IEEE. All rights reserved. 4.4 Cable tray A steel ladder cable tray, as shown in Figure 3, shall be used. The cable tray shall comply with NEMA VE 1-2002 or CSA Standard C22.2, No. 126.1-02. The rungs shall be attached to the inside of the side channels

37、. The tray shall be located so the burner flame will impinge on the cable midway between rungs. Figure 3 Cable tray, specimen, and burner details 4.5 Burner and mixer The ribbon burner shall be a nominal 254 mm (10 in) strip- or ribbon-type propane-gas burner with an air/gas venturi mixer as shown i

38、n Annex A or IEC 60332-3-10.9The burner shall be mounted on a stand and placed 20 2 from the horizontal with the burner ports up (see Figure 3). The top of the burner shall be located 305 mm 25 mm (12 in 1 in) above the base of the cable tray and parallel to the cable tray rungs. A guide shall be at

39、tached to the burner or stand so the leading edge of the burner face can be accurately placed 76 mm 5 mm (3 in 0.2 in) horizontally from the nearest surface of the cables. 9NOTESee Annex A for information on burner and mixer. IEEE 1202-2006 IEEE Standard for Flame-Propagation Testing of Wire and Cab

40、le 7 Copyright 2006 IEEE. All rights reserved. 4.6 Flowmeters A flowmeter shall be located in the propane line and in the air line feeding the burner to measure the flow rates of these gases during the test. The propane flowmeter shall be capable of measuring a flow rate of 230 cm3/s (29 ft3/h). The

41、 air flowmeter shall be capable of measuring a flow rate of 1360 cm3/s (173 ft3/h). Measurements shall be accurate within 3%. A mass flow controller with an output that can be recorded should be used; however properly calibrated volumetric flow meters are also acceptable. 4.7 Supply air The air supp

42、lied to the burner shall be compressed air, either bottled or supplied through a compressed air system. The air supply shall be filtered, when necessary, to eliminate contaminants that could affect the test results. 4.8 Propane The propane gas supplied to the burner shall be equivalent to Propane HD

43、-5 as specified in ANSI/ASTM D1835-2003 or CAN/CGSB 3.14-06 (Grade 1). The gas shall have a nominal heating value of 93.0 MJ/m3(2500 Btu/ft3). The temperature of the propane gas shall be 25 C 5 C (77 F 9 F). 5. Test sample requirements 5.1 Cable samples Unless otherwise specified by the user, recogn

44、ized testing laboratory, or the inspection authority having jurisdiction, the minimum conductor size construction for each cable design shall be tested to qualify all larger sizes using identical materials. Addition or deletion of a cable component or a change in material(s) shall constitute a new c

45、able design, except that deletion of fillers or a strand separator shall not constitute a new cable design for power or control cable which has metal conductors. Cable constructions shall consist of single-insulated conductors or multi-conductor cables within all applicable voltage classes, as follo

46、ws: a) Multi-conductor cables: The smallest conductor size in the cable design with the fewest conductors, e.g., 2 conductor 18 AWG (0.823 mm2). b) Single-insulated conductors: The smallest single conductor in the cable design. NOTEPractical experience within the cable industry has shown that passin

47、g the test with the smallest conductor qualifies larger conductors within the same voltage class of the same cable design.1010Notes in text, tables, and figures are given for information only and do not contain requirements needed to implement the standard. IEEE 1202-2006 IEEE Standard for Flame-Pro

48、pagation Testing of Wire and Cable 8 Copyright 2006 IEEE. All rights reserved. 5.2 Tests required Each cable design shall be subjected to two flame tests. A third and final test shall be performed if one of the first two tests results in a failure. 6. Flame test procedure 6.1 Cable mounting The leng

49、th of each cable specimen or each cable bundle shall be 2.4 m 0.1 m (8 ft 0.3 ft). Depending on the outside diameter of the individual cable, the test specimen shall be either an individual length or a bundle of individual lengths. The specimens or specimen bundles shall be centered between the side rails in a single layer. The lower end of each specimen or specimen bundle shall be located not more than 100 mm (4 in) above the bottom end of the cable tray. Each specimen or sp