ICEA T-30-520-1986 Conducting Vertical Cable Tray Flame Tests with Theoretical Heat Input Rate of 70 000 B T U Hour ( For Reference Only ).pdf

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1、 ICEA T-30-520 6 9007034 OOOL065 028 M GUIDE FOR CONDUCTING VERTICAL CABLE TRAY FLAME TESTS With Theoretical Heat Input Rate Of 70,000 B.T.U./HOUR PUBLICATION T-30-520 SEPTEMBER 1986 1986 by INSULATED CABLE ENGINEERS ASSOCIATION, INC. - ICEA T-30-520 8b = 9007034 OOOLObb Tb4 W FOREWORD ICEA publicat

2、ions are adopted in the public interest and are designed to eliminate misunderstanding be- tween the manufacturer and user and to assist the user in selecting and obtaining proper products for his particu!ar need. Existence of an ICEA publication does not in any respect preclude the manufadure or us

3、e of products not conforming to the publication. The user of this publication is cautioned to observe any health or safety regulations and rules relative to the manufacture and use of cable covered by this document. Suggestions for improvements in this publication are welcome, and should be sent to

4、ICEA at the address below. Copyrighted by the ICEA Contents may not be reproduced in any form without permission of the INSULATED CABLE ENGINEERS ASSOCIATION, Inc. Copies of this publication may be obtained from: Insulated Cable Engineers Association, Inc. Post Office Box P South Yarmouth, Massachus

5、etts 02664 Telephone: (617) 394-4424 ICEA Pub. T-30-520 VERTICAL TRAY 70,00O*BTU/HR FLAME TEST PROCEDURE FOR CABLES 1.0 SCOPE: 1.1 THIS FLAME TEST SHALL BE CONDUCTED TO DETERMINE RELATIVE RESISTANCE TO FLAME PROPAGATION UNDER SPECIFIED TEST CONDITIONS FOR A GIVEN CABLE CONSTRUCTION. 1.2 THE ABILITY

6、OF A CABLE TO RESIST PROPAGATION TO THE TOP OF THE TRAY DOES NOT GUARANTEE THAT PROPAGATION OF THAT SAME CABLE CANNOT OCCUR UNDER INSTALLED CONDITIONS DURING AN ACTUAL FIRE NOR DOES IT PRECLUDE THE NEED FOR OTHER FIRE SUPPRESSIVE SYSTEMS. 2.0 SUMMARY OF METHOD: 2.1 MULTIPLE LENGTHS OF CABLES ARE ATT

7、ACHED TO A VERTICAL TRAY AND ARE SUBJECTED TO A DEFINED PROPANE GAS FLAME FOR A 20 MINUTE PERIOD. AT THE END OF THE TEST THE AMOUNT OF BURN DAMAGE TO THE CABLES IS DETERMINED. 3.0 FLAME TEST FACILITY: 3.1 TEST SHALL BE CONDUCTED IN A NATURALLY VENTILATED ROOM, OR AN ENCLOSURE, FREE FROM EXCESS DRAFT

8、S AND SPURIOUS AIR CURRENTS. DURING OPERATION THERE SHOULD BE SUFFICIENT VENTILATION SO THAT BURNING IS NOT LIMITED BY A BUILD-UP OF COMBUSTION PRODUCTS OR BY A DEARTH OF MAKE-UP AIR. 4.0 TEST EQUIPMENT: 4.1 THE TEST TRAY SHALL BE A VERTICAL LADDER TYPE STEEL TRAY 12 INCHES WIDE BY 8 FEET LONG. THE

9、SIDE CHANNELS SHALL BE 3 INCHES DEEP WITH 1 INCH FLANGES AND 0.060 INCHES THICK. THE RUNGS SHALL BE 1 X Paqe 1 *THEORETICAL HEAT INPUT ICEA T-30-520 86 m 9007034 000LOb8 837 m T-30-520 Pase 2 4.2 4.3 4.4 4.5 4.6 1/2 INCHES U-SHAPED CHANNELS, 0.125 INCHES THICK AND WELDED TO THE SIDE RAILS AT 9 INCHE

10、S ON CENTER. THE 10-INCH RIBBON GAS BURNER AND AIR GAS VENTURI MIXER SHALL BE BY AMERICAN GAS FURNACE COMPANY, CATALOG NUMBER 1OL-11-55 AND 14-18 RESPECTIVELY, OR EQUIVALENTS. GAS AND AIR FLOW METERS WILL BE USED AND MUST MEET THE SPECIFIED LIMITS DETERMINED BY THE TEST SET-UP. THE GAS SHALL BE NATU

11、RAL-GRADE PROPANE WITH A KNOWN HEAT OF COMBUSTION A SCALE ACCURATE TO +5% TO WEIGH THE PROPANE CONSUMED. A CLOCK TIMER (TO RECORD 20 MINUTE TEST DURATION, AND AFTERBURN). - 5.0 CABLE SAMPLES: 5.1 N CABLE SPECIMENS EACH EIGHT FEET IN LENGTH SHOULD BE ARRANGED IN A SINGLE LAYER FILLING AT LEAST THE CE

12、NTER SIX-INCH PORTION OF THE TRAY WITH A SEPARATION OF ONE-HALF THE CABLE DIAMETER BETWEEN CABLES. THE NUMBER OF CABLE SPECIMENS SHOULD BE CALCULATED USING THE FOLLOWING FORMULA: N = 4/D + 0.33 WHERE N = NUMBER OF CABLES (ROUNDED UP TO THE NEAREST WHOLE NUMBER) D = DIAMETER OF CABLE IN INCHES 5.2 TH

13、E CABLE SAMPLES WILL BE TIED EVERY 9 INCHES (TO A TRAY RUNG) WITH ONE WRAP OF A COPPER OR STEEL WIRE TIE NO SMALLER THAN .040“ OR LARGER THAN .064“ IN DIAMETER. ICEA T-30-520 8b 9007014 OOOLOb9 773 9 T- 30- 520 6.0 TEST SET-UP: 6.1 THE LOADED METAL TRAY SHALL BE POSITIONED VERTICALLY IN FRONT OF THE

14、 GAS BURNER AND NOT CLOSER THAN 12 INCHES TO ANY ENCLOSURE WALL. 6.2 THE RIBBON GAS BURNER SHALL BE MOUNTED SUCH THAT THE FLAME IMPINGES UPON THE CABLE SAMPLES MIDWAY BETWEEN THE TRAY RUNGS. 6.3 THE BURNER POSITION (HORIZONTAL CENTER LINE) SHALL BE AT A POINT 24 + 1/2 INCHES FROM THE BOTTOM OF THE T

15、RAY AND THE BURNER FACE SHALL BE 4 + 1/4 INCHES FROM THE CABLE ON THE RUNG SIDE OF THE TRAY. - - 6.4 THE FLOW METERS TO THE BURNER SHALL INDICATE AN AIR FLOW OF 163 (+10-0) SCFH AND THE NATURAL-GRADE PROPANE FLOW RATE SHALL BE THAT APPROPRIATE TO PROVIDE A THEORETICAL HEAT INPUT OF 70,000 (+5% -0%)

16、BTU/HR. 6.5 THE CABLE SAMPLES SHALL BE AT A TEMPERATURE NOT LOWER THAN 10C (50F) IMMEDIATELY PRIOR TO FLAME IGNITION. THE INCOMING AIR SHOULD ALSO BE AT A TEMPERATURE NOT LESS THAN 10C (50F). 7.0 TEST PROCEDURE: 7.1 THE TEST AREA SHALL BE PURGED OF ANY RESIDUAL SMOKE. 7.2 THE HEAT INPUT WILL BE MEAS

17、URED AND REPORTED ON THE BASIS OF THE WEIGHT OF THE PROPANE CONSUMED AND ITS THEORETICAL HEAT CONTENT. 7.3 OBSERVING ALL NECESSARY SAFETY PRECAUTIONS, THE BURNER SHALL BE IGNITED. 7.4 THE AIR AND GAS FLOW SHALL BE MONITORED AND ADJUSTED AS NECESSARY THROUGHOUT THE TEST TO MAINTAIN THE REQUIRED FLOW

18、SETTINGS. 7.5 AFTER 20 MINUTES THE BURNER SHALL BE EXTINGUISHED. Paqe 3 ICEA T-30-520 6 m 9007034 OOOLO70 495 m T- 3 0-5 2 O Pase 4 8.0 TEST RESULTS: 8.1 RECORD THE LENGTH OF TIME THE CABLE CONTINUES TO BURN AFTER THE BURNER IS EXTINGUISHED. 8.2 RECORD THE MAXIMUM CABLE DAMAGE HEIGHT ABOVE THE BURNE

19、R. CABLE DAMAGE SHALL BE DEFINED AS CHAR OF THE JACKET OK INSULATION. SOOT, BLISTERS AND/OR DISCOLORATION SHALL NOT BE CONSIDERED CHAR. 9.0 TEST CRITERIA: 9.1 IN ORDER TO PASS THE TEST, THE DAMAGE TO EACH CABLE SHALL NOT EXTEND TO THE TOP OF THE TRAY. THE TEST SHALL BE CONDUCTED TWO TIMES TO DEMONST

20、RATE REPRODUCEABILITY. 10.0 REPORT: 10.1 THE REPORT OF TEST RESULTS SHALL INCLUDE THE FOLLOWING: 10.1.1 DESCRIPTION OF CABLE, INCLUDING OD 10.1.2 NUMBER OF CABLES IN TRAY 10.1.3 TEMPERATURE OF AMBIENT AIR AND SPECIMENS PRIOR TO FLAME APPLICATION, IN DEGREES F. 10.1.4 AIR FLOW IN SCFH 10.1.5 PROPANE

21、FLOW IN SCFH 10.1.6 WEIGHT OF PROPANE CONSUMED AND CALCULATED THEORETICAL HEAT INPUT, IN BTU/HR. 10.1.7 AFTERBURN OF CABLES AFTER GAS FLAME HAS BEEN EXTINGUISHED, IN MINUTES. 10.1.8 HEIGHT OF MAXIMUM BURN DAMAGE ABOVE BURNER, IN INCHES. 10.1.9 PASS/FAIL STATEMENT, ICEA T-30-520 8b = 90070/4 000107L 321 Figure 1 Vertical Cable Tray Flame Test