NUREG/CR-0596

SAND78-2238

RP

A PRELIMINARY REPORT ON

FIRE PROTECTION RESEARCH PROGRAM*

FIRE BARRIERS AND SUPPRESSION

(September 15, 1978 Test)

Leo J. Klamerus

Manuscript Submitted: November 1978

Date Published: December 1978

Sandia Laboratories

Albuquerque, NM 87185

operated by

Sandia Corporation

for the

U.S. Department of Energy

Prepared for

Division of Reactor Safety Research

Office of Water Reactor Safety Research

U.S. Nuclear Regulatory Commission

Washington, DC 20555

Under Interagency Agreement DOE 40-550-75

NRC FIN No. A1010

*Further evaluation of these tests is continuing.

Additional tests which may affect the conclusions contained

herein are underway.

3-4
ABSTRACT

A full-scale fire test was conducted at Underwriters

Laboratories Inc. on September 15, 1978. The test was to

demonstrate the effectiveness of a ceramic fiber blanket

and automatic fire suppression system to protect cables in

a vertical cable tray configuration that is currently

permitted by separation criteria guidelines. An open pool

fire fueled by liquid hydrocarbon was used. This was one

of a series of tests to demonstrate the response of various

cable arrangements and fire protection features in exposure

fires.

5-6
CONTENTS

Page

Figures .............. .......................... 8

Tables 9......................9

I Test Procedure ................ ..................... 11

A. Description ..... ............... .. ......... 11

1. Corner-Ceiling Assembly 11

2. Cable Trays 11

3. Cable 11

4. Cable Fasteners 12

5. Fire Pan 12

6. Fire Barrier 12

7. Automatic Sprinklers 12

8. Automatic Fire Detectors 12

B. Method ............................ 13

II Results ..................... ........................ 17

A. Test Results ................. .............. 17

1. Visual observations During Test 17

2. Detector Events Record 18

3. Sprinkler Events Record 18

4. Air Temperatures 18

5. Cable Temperatures 18

6. Circuit Integrity Record 18

B. Posttest Results ... ................ ........ 18

1. Posttest Visual Observations 18

2. Circuit Integrity Results 20

3. Sprinkler Operation Test Results 20

7
FIGURES

Page

Figure Description Page

1 Test Assembly 36

2 Insulation Assembly 37

3 Cable Tray Thermocouple Locations 38

4 Air Thermocouple Locations 39

5 Test Assembly Prior to Fire Test 40

6 Test Assembly at Ten Seconds 41

7 Test Assembly at Ninety Seconds 42

8 Air Temperature Versus Time 43

(Sprinkler 2)

9 Air Temperature Versus Time 44

(Sprinklers 1 & 3)

10 Air TeMperatures Versus Time 45

11 Tray 3 After Test 46

12 Tray 3 After Test 47

13 Tray 2 After Test 48

8
TABLES

Table Description Page

1 Link Activation Time 21

2 AirTemperatures (Sprinklers 1, 2 and 3) 22

3 Air Temperatures 23

4 Air Temperatures 24

5 Air Temperatures 25

6 Air Temperatures 26

7 Cable Tray Temperatures (Tray 1) 28

8 Cable Tray Temperatures (Tray 2) 29

9 Cable Tray Temperatures (Tray 3) 30

10 Cable Tray Temperatures (Tray 4) 31

11 Cable Tray Temperatures (Tray 5) 32

12 Summary of Cable Damage 33

13 Results of Air Oven Tests of Dummy 34

Sprinklers

14 Summary of Cable Tray Temperatures 35

9-10
FULL SCALE FIRE TEST NO. 1

Test Procedure

A. DESCRIPTION:

The test assembly was constructed as shown in Figure 1.

The various items which comprised the test assembly are described as follows:

1. Corner-Ceiling Assembly - A corner-ceiling assembly

approximately 20 x 20 x 15 feet high (6.1 x 6.1 x 4.6 m)

was used to simulate a corner-room situation *(a conservative

approach) as shown on Figure 1. The walls consisted of steel

framing with 1/2 inch (1.3 cm) thick Marinite boards forming

the interior surface. The suspended ceiling consisted of a

steel angle grid system which supported nominal 4 feet

x 4 feet x 1/2 inch thick (1.2 x 1.2 x 0.01 m) Marinite

panels. The interior surfaces of the walls were painted

flat black. Several observation windows were provided.

2. Cable Trays - The five cable trays used in the test

configuration were open ladder type and nominally 18 inches

(45.7 cm) wide> The side channels were 4 inches (10.2 cm)

deep with 3/4 inch (1.9 cm) flanges fabricated from 0.065

inch (1.6 mm) thick galvanized steel. The 0.065 inch

thick galvanized steel tray rungs were I inch (2.5 cm)

wide with 3/4 inch legs, and were welded to the side

channels at 9 inch (22.9 cm) intervals.

3. Cable - The three-conductor cable employed in this

test had 0.468 inch (1.2 cm) outside diameter and 600 V

rating. The conductors were No. 12 AWG stranded copper.

II
The conductor insulation was 0.027 (0.7 mm) inch thick

polyethylene with a polyvinylchloride jacket, a core

wrap, and a 0.063 inch (1.6 mm) thick polyvinylchloride

cable jacket. This cable was not qualified to IEEE 383-74.

4. Cable Fasteners - Ties formed from No. 16 SWG steel

wire were used to group the cables and fasten the cables

to the tray rungs. Though not typically used in plant

cable systems, these steel wires were chosen to maintain

the conservative positioning of the cables in the tray.

5. Fire Pan - A steel pan about 25 square feet (2.3 m2 )

in area was formed from cold rolled steel, as shown in

Figure 1, and was used as the containment vessel for the

liquid fuel.

6. Fire Barrier - The barrier installed about each cable

tray consisted of an assembly of ceramic wool blanket

pieces as shown in Figure 2. The ceramic wool blanket

was 1 inch (2.54 cm) thick and had a density of 7.8 pcf

(124.9 kgr/m3 ). The various blanket pieces were fastened

with 3/4 inch (1.9 cm) wide, 0.023 inch (0.6 mm) thick

coated steel bands and band clips.

7. Automatic Sprinklers - Upright automatic sprinklers

were located as shown in Figure i. All sprinkiers were

nominally identical, with standard orifices of 1/2 inch

(1.3 cm) diameter and a 165%F (74 0 C) rating.

8. Automatic Fire Detectors - Two spot-type smoke

detectors were installed at the ceiling within the corner

as shown in-Figure 1. One was an ionization chamber type

12
and one was a photoelectric type. Neither line-type nor

sampling detectors were used in this test.

B. METHOD:

Cable segments in lengths of about 31 feet (9.4 m) were

bundled together in groups of eight and fastened together with

steel wire ties at about 3 foot (0.9 m) intervals. The cable

bundles were installed in each 15 foot (4.6 m) tray with seven

bundles forming the back layer against the tray rungs. The

cable bundles were folded back at the bottom of the tray to

form a front layer of seven bundles. All cable bundles were

attached to the top and bottom tray rungs with steel wire ties.

The cable trays were installed in the steel fire pan and

located within the corner-ceiling assembly as shown in Figure 1.

The trays were installed with the cable ends above the suspended ceiling level. Since the cable bundles were bent at

midlength, loops of cable bundles appeared at the base of each

cable tray. The distances between the loops and the base of

the tray varied from about 3 to 6 inches (7.6 to 15.2 cm).

All cables were energized at low voltage during the

test. All conductors with the same color code within each

tray were connected in parallel to provide three circuits per

tray. During the test, each circuit carried low current

(milliamps), and was monitored continuously for shorts

between conductors or between conductors and tray.

Each tray was wrapped with a ceramic wool fire barrier

as shown in Figure 2. The ceramic wool was installed

according to the manufacturer's specifications. The barrier

13
used an outer layer of 1 inch (2.54 cm) thick wool wrapped

around each tray for its entire length from floor to ceiling.

Additional pieces covered 1) the entire front surface of the

cable bundle along the vertical overlapping joint of the outer

layer, 2) the back surface of the cable bundle and tray at

horizontal butt joints of the outer layer, 3) the horizontal

butt joints of the outer layer, and 4) the ceiling and floor

butt joints. The ceramic' wool was secured with steel bands

located at 12 inch (30.5 cm) intervals along the tray length.

Three open-head sprinklers were located 12 inches below

the ceiling and at the positions shown in Figure 1. Each

sprinkler was connected to a separate manually operated water

supply. Three dummy sprinkler heads without connection to

the water supply %ere suspended near each open head. During

the test the three dummy heads were monitored electrically to

determine the times at which the fusible links activated.

It was intended that only after activation of all three dummy

heads at one location would the water system be manually

operated. The water system was designed to produce a pressure

of 35 psig (2.4 x 105 Pa) at each open head. This sprinkler

configuration is acceptable per NFPA guidelines, and the head

pressure is representative of the pressure at the first few

heads to open in a sprinkler system in a localized fire

situation.

Two automatic smoke detectors were located at the

ceiling 15 feet (4.6 m) from each wall as shown in Figure 1.

Each detector was monitored during the test to determine the

14
time of actuation. NFPA Nos. 71, 72A, 72B, 72C, and 72D state

that the location of smoke detectors should be based upon an

engineering survey of the application of this form of protection

to the area under consideration.

Temperatures within the cable trays were measured with

seven thermocouples located within each tray as shown in

Figure 3. Air temperatures between cable trays over the

fire pan, and near each open head sprinkler, were measured

with stainless-steel-sheathed Type K thermocouples as shown

in Figure 4.

The appearance of the test assembly before the fire test

is shown in Figure 5.

The test was initiated by pouring two gallons (7.6 x

10-3 M3 ) of heptane uniformly into the pan from four separate

containers and igniting the heptane by torch ten seconds

afterwards. Throughout the test, visual observations were

recorded of flame distribution and other developments pertinent to the fire performance of the cable tray assemblies.

The test was concluded after all related fire activity had

ceased. Photographic coverage included 35 mm slides and 8 mm

movies. Video tape recording was used as a backup for the

movies.

15-16
RESULTS

A. TEST RESULTS:

1. Visual Observations During Test -

Time

(Min:Sec)

0 :10

1:30

4:00

5:00-23:00

23:35

Description

Flaming appeared uniform over the entire pan area

with a maximum flame height of 4 feet (1.2 m).

Appearance of test assembly is shown in Figure 6.

All flames now issued from the base of ceramic

wool on each cable tray. (It appeared the heptane had been soaked up by the wool, and was

burning slowly in wick fashion.) Maximum flame

height was about 3 feet (0.9 m) except between

trays 1 and 3. Maximum flame height between

these two trays was 6 feet (1.8 m) Appearance

of test assembly is shown in Figure 7.

Flame height between trays 1 and 3 decreased to

3 feet (0.9 m).

Flaming continued but intensity and height

gradually diminished.

A loud report was heard and a burst of flame

issued from the base of tray 3. Wool wrapping on

tray 3 between 6 and 10 feet (1.8 and 3.0 m) above

the floor appeared to have slipped from its

fasteners causing openings in the vertical and

horizontal joints.

17
24:00-40:00 Flaming continued to diminish gradually.

40:00 All flaming ceased.

2. Detector Events Record - Detector actuations occurred

as follows:

Actuation Time

Type (Min:Sec)

Ionization 0:11

Photoelectric 0:14

3. Sprinkler Events Record - The time at which the

fusible links activated are shown in Table 1.

4. Air Temperatures - Temperatures of the air between

the cable trays and near the sprinklers are shown in

Tables 2 through 6 and Figures 9 and 10.

5. Cable Tray Temperatures - Temperatures within each

cable tray are shown in Tables 7 through 11. A summary

of maximum cable tray temperatures is shown in Table 14.

6. Circuit Integrity Record - At 3 min 13 sec, a short

circuit between conductors 1 and 3 in cable tray 3 was

indicated. At 3 min 55 sec, erratic measurements were

recorded for the conductors in tray 1 indicating the

existeince of inLermittent shoir circulits.

B. POSTTEST RESULTS:

1. Posttest Visual Observation - The mineral wool was

blackened about the base of each tray and extended upward about 1 foot (0.3 m) on trays 1, 2, and 4. On

tray 3, the blackened area extended to about 4 feet (1.2 m)

18
24:00-40:00 Flaming continued to diminish gradually.

40:00 All flaming ceased.

2. Detector Events Record - Detector actuations occurred

as follows:

Actuation Time

Type (Min:Sec)

Ionization 0:11

Photoelectric 0:14

3. Sprinkler Events Record - The time at which the

fusible links activated are shown in Table 1.

4. Air Temperatures - Temperatures of the air between

the cable trays and near the sprinklers are shown in

Tables 2 through 6 and Figures 9 and 10.

5. Cable Tray Temperatures - Temperatures within each

cable tray are shown in Tables 7 through 11. A summary

of maximum cable tray temperatures is shown in Table 14.

6. Circuit Integrity Record - At 3 min 13 sec, a short

circuit between conductors 1 and 3 in cable tray 3 was

indicated. At 3 min 55-sec, erratic measurements were

recorded for the conductors in tray 1 indicating the

existance of intermittant short circuits.

B. POSTTEST RESULTS:

1. Posttest Visual Observation - The mineral wool was

blackened about the base of each tray and extended upward about 1 foot (0.3 m) on trays 1, 2, and 4.- On

tray 3, the blackened area extended to about 4 feet (1.2 m)

19
above the floor. The interior surface of the wool

appeared unchanged, except for small areas of light

brown near the base in trays 1, 2, 3 and 4, as shown

in Figure 11.

In all cable trays except tray 5, thermal damage of

cables was observed near the base (3 to 6 inches above the

fire pan). A summary of damage is shown in Table 12.

Cable damage in tray 3 is shown in Figures 11 and 12.

Cable damage in tray 2 is shown in Figure 13.

2. Circuit Integrity Results - The erratic measurements

recorded by tray 1 were determined to be the result of

inadvertant contact between connectors above the

ceiling. Trays 1, 2, 4, and 5 were examined after the

test to determine the insulation resistance between

conductors and between conductor and trays. All resistances were normal except for that between one conductor

and tray 2, which was less than 100,000 ohms (normally

greater than 20 mohms). Insulation resistance was

measured with a "megger" at 500 V. A short circuit

in tray 3 was verified.

3. Sprinkler Operation Test Results - The dummy sprinklers, which did not operate during the test, were subjected to air-oven operation tests in accordance with

Standard UL199. Results of these tests are shown in

Table 13.

20
TABLE 1 - Link Activation Time

Location

1

1

1.

2

2

2

3

3

3

Sprinkler No.

1A

1B

IC

2A

2B

2C

3A

3B

3C

Link Activation Time

(Min:Sec)

0:52

0:54

N

N

N

N

N

N

N

N - Link did not activate during test.

21
TABLE 2 - Air Temperatures (Sprinklers 1, 2 and 3)(OF)

Time

(Min:Sec)

0:00

0:27

0:57

1:27

1:57

2:27

2:57

3:27

3:57

4:27

4:57

5:57

6:57

7.57

8:57

9:57

15:57

1 Q 7

28:44

39:27

1

69.7

234.7

235.4

186.4

178.0

165.2

158.4

156.2

149.2

142.1

137.4

129.4

123.3

115.1

112.0

96.0

92 9

81.7

77.9

Locations

2

70 .1

225.0

223.4

176.7

160.8

148.5

138.1

137.0

140.4

130.4

125.3

125.1

120.6

116.8

111.5

109.7

100.7

95,0

83.4

77'.6

3

70.0

187.9

§96.8

165.3

153.6

143.4

140.1

133.3

128.3

124.8

119.3

115.9

112.8

108.5

102.2

94.1

90c 5

79.9

76.0

22
TABLE 3

Air Temperatures (OF)

Time (Min:Sec) T. C. Location

12 3 4 5 6

Pretest 73.8 73.8 73.8 74.1 74.1 74.1

0:31 - 0:33 215.4 229.8 235.6 162.3 171.7 167.8

1:01 - 1:03 338.9 354.9 369.2 204.5 224.0 220.0

2:01 - 2:03 381.5 389.0 400.4 219.9 245.6 263.5

2:3'1 - 2:33 353.5 357.1 371.7 202.7 218.8 218.7

3:31 - 3:33 275.0 271.1 292.8 158.6 174.7 171.6

4:01 - 4:03 338.3 319.8 337.7 232.1 255.7 251.9

4:31 -4:33 323.7 319.2 329.3 257.9 283.3 284.8

5:01 -5:03 287.9 289.4 319.4 235.0 253.0 254.7

6:01 -6:03 231.3 230.2 252.5 201.0 220.2 220.0

7:01 -7:03 209.3 206.7 224.1 203.0 214.3 219.3

8:01 - 8:03 203.8 206.7 226.2 174.9 185.1 .187.2

9:01 - 9:03 170.9 177.1 195.2 176.9 190.8 19.2.5

10:01 - 10:03 170.5 171.5 191.1 163.4 171.0 174.2

12:01 - 12,:03 136.3 141.9 155.1 150.1 157.6 157.3

20:01 - 20:03 92.1 92.9 95.8 99.1 100.6 102.6

35:01 - 35:03 81.9 82.3 82.9 82.9 82.5 82.8

23
TABLE 4

Air Temperatures (OF)

Time (Min:Sec) T. C. Location

7 8 9 10 11 12

Pretest 73.6 73.5 73.6 74.1 74.2 74.1

0:34 - 0:37 1528.6 1329.6 1292.4 474.0 477.6 471.6

1:04 - 1:07 1133.5 1041.3 1022.0 437.5 447.7 460.2

1:34 - 1:37 1605.7 1554.4 1576.8 518.1 533.8 519.1

2:04 - 2:07 1143.0 1112.0 1162.7 489.8 518.1 521.7

2:34 - 2:37 1288.7 1239.3 1283.9 439.6 451.6 460.1

3:34 - 3:37 989.8 928.3 918.7 344.4 338.9 343.5

4:04 - 4:07 588.3 551.7 552.5 322.9 328.6 325.0

4:34 - 4:37 457.0 430.0 440.7 331.8 334.7 336.3

5:04 - 5:07 394.8 378.0 380.8 299.7 298.8 303.4

6:04 - 6:07 408.2 399.7 407.1 303.7 301.4 309.6

7:04 - 7:07 372.0 354.2 364.1 285.0 290.4 291.1

8:04 - 8:07 269.1 253.9 255.5 242.0 240.7 240.7

9:04 - 9:07 227.7 213.8 218.8 211.7 210.3 209.1

10:04 - 10:07 198.0 184.1 183.9 194.1 186.8 186.4

16-0A - 10.07 1-36.3 130.9 133.5 141.6 141.8 143.1

20:04 - 20:07 202.1 192.8 199.0 136.7 135.0 138.1

22:04 - 22:07 143.4 137.5 140.2 120.6 120.1 121.6

35:04 - 35:07 94.8 91.6 91.0 91.3 90.1 90.0

24
TABLE 5

Air Temperatures (OF)

Time (Min:Sec) T. C. Location

13 14 15 16 17 18

Pretest 74.1 73.9 73.9 74.4 74.4 73.8

0:37 - 0:39 579.1 518.4 473.5 182.7 196.7 213.5

1:37 - 1:39 382.8 323.7 278.0 149.9 156.1 182.8

2:07 - 2:09 368.5 300.3 257.2 140.1 148.3 187.9

2:37 - 2:39 260.9 221.0 192.3 129.8 138.3 160.5

3:37 - 3:39 239.2 215.7 201.2 118.8 122.6 118.3

4:07 - 4:09 245.5 212.9 183.5 123.6 125.3 110.2

4:37 - 4:39 205.0 175.8 154.9 122.0 126.1 141.4

5:07 - 5:09 193.0 162.1 141.4 118.9 124.1 141.2

6:07 - 6:09 199.9 184.1 172.1 114.7 118.7 103.8

7:07 - 7:09 206.8 173.8 147.7 117.6 123.6 147.9

8:07 - 8:09 192.7 159.3 139.4 107.1 111.4 123.6

9:07 - 9:09 66.4 140.6 119.7 103.7 104.1 120.5

10:07 - 10:09 154.6 130.4 115.5 105.9 106.5 106.4

16:07 - 16:09 161.4 127.0 108.0 98.4 98.4 103.3

20:07 - 20:09 114.4 105.7 98.4 93.9 95.4 96.1

35:07 - 35:09 84.5 81.9 81.4 82.0 81.9 83.1

2S
TABLE 6

Air Temperatures (OF)

Time (Min:Sec)

Pretest

0:10

0:40

1:10

1:40

2:10

2:40

3:40

4:10

4:40

5:10

6:10

7:10

8:10

9:10

10:10

10:10

20:.10

35:10

Pretest

0:25

0:55

19

74.4

134.1

206.1

182.4

164.3

154.1

144.3

123.8

128.6

127.6

129.2

121.4

126.3

114.0

105.7

106.5

99e7

97.5

82.1

T. C. Locations

20 21 22

73.7

163.2

211.6

171.1

212.2

217.4

170.5

131.3

122.8

160.0

165.8

117.2

162.0

147.3

132.7

118.9

121,8

102.4

83.5

23

73.1

172.7

149.3

24

73.1

167.8

145.6

74.4 74.1

333.7 178.5

253.5 160.3

26
TABLE 6 (cont'd)

Air Temperatures (OF)

Time (Min:Sec)

19

1:25

1:55

2:25

3:25

4:25

5:25

6:25

7:25

8:25

9:25

10:25

15:25

20:25

35:25

T. C. Locations

20 21 22

224.9 141.1

238.6 136.5

244.0 130.0

204.5 122.3

150.6 114.6

170.4 113.2

166.8 114.7

181.0 117.2

171.5 112.0

155.5 108.1

136.2 103.7

146.7 103.9

103.0 88.7

80.0 76.9

23

137.1

128.7

123.6

117.2

109.8

108.9

109.4

112.2

107.1

104.7

99.3

101.2

86.9

76.5

24,

133.3

126.1

123.3

113.9

109.2

106.8

106.0

109.2

104.4

105.0

97.5

99.5

86.2

76.7

27
TABLE 7

Cable Tray Temperatures (OF)

Tray 1

Time (Min:Sec) T. C. Locations

Pretest

0:42

1:12

1:42

2:12

2:42

3:42

4:12

5:12

6:12

7:12

8:12

9:12

10:12

20:12

36:12

48:38

60:13

105:12

1

74.2

74.4

74.3

74.4

74.5

74.5

74.7

74.8

74.9

75.0

74.9

74.9

74.9

74.8

75.2

76.7

77.1

77.3

77.3

2

74.1

73.7

73.7

73.8

73.9

74.0

74.3

74.6

75.2

90.8

79.8

80.1

80.8

81.3

118.9

134.5

130.8

126.3

111.9

3

73.1

73.4

73.1

73.3

73.5

73.7

73.9

74.1

74.6

75.5

76.3

77.3

79.3

82.1

118.7

131.9

126.9

121.8

110.4

4

73.1

73.1

73.1

73.1

73.1

73.2

74.1

74.9

76.3

76.3

74.2

74.7

75.0

75.4

79.5

89.5

95.3

98.2

99.9

5

78.7

82.6

87.5

92.0

96.6

100.8

107.8

110.9

116.8

121.4

123.9

122.5

123.9

124.7

106.8

81.5

73.5

70.0

66.8

6

73.1

73.1

73.1

73.1

73.2

73.4

73.4

73.4

73.4

73.6

73.6

73.7

73.7

73.7

75.5

78.9

80.5

81.5

83.4

7

73.4

73.4

73.4

73.4

73.5

73.5

73.6

73.6

73.6

73.7

73.6

73.6

73.6

73.6

73.7

74.6

75.4

76.1

77.7

28
TABLE 8

Cable Tray Temperatures (OF)

Tray 2

Time (Min:Sec) T. C. Locations

1 2 3 4 5 6 7

Pretest 72.2 73.7 73.8 72.7 72.9 76.3 72.8

0:45 72.3 73.8 73.8 72.6 72.9 77.3 72.8

1:15 72.3 73.9 74.0 104.4 79.7 78.2 73.2

1:45 72.3 74.1 74.2 86.3 76.7 79.7 73.5

2:15 72.2 74.4 74.6 82.0 75.7 81.6 73.6

2:45 72.1 74.8 75.0 80.4 75.3 84.1 73.7

3:45 72.1 75.7 75.9 79.3 75.2 90.0 73.8

4:15 72.1 76.3 76.7 79.4 75.4 93.4 73.8

5:15 72.1 78.0 78.5 110.0 89.0 99.2 74.2

6:15 72.1 79.4 80.9 94.2 86.8 105.4 74.4

7:15 72.1 80.7 82.5 90.1 88.9 112.7 74.8

8:15 72.2 80.7 84.3 92.8 94.9 116.8 75.3

9:15 72.3 82.0 86.0 119.8 112.0 117.9 76.3

10:15 72.3 84.8 87.7 101.8 106.7 123.0 76.8

16:15 72.0 99.2 98.6 109.7 121.2 134.0 80.7

20:15 71.3 104.9 102.9 113.0 127.3 133.8 85.0

35:15 70.3 113.9 112.6 115.7 137.4 113.1 100.5

60:16 69.4 115.1 118.5 125.1 137.9 81.6 109.5

105:15 68.2 108.8 116.3 121.7 125.1 55.3 113.2

150:15 68.9 102.8 108.8 115.0 115.5 48.5 112.8

29
TABLE 9

,Cable Tray Temperatures (OF)

Tray 3

Time (Min:Sec) T. C. Locations

1 2 3 4 5 6 7

Pretest 73.9 73.1 73.6 73.5 73.0 73.3 73.5

0:50 73.9 73.4 73.6 73.8 73.8 73.7 75.0

1:20 74.0 73.5 73.8 74.6 74.3 74.3 76.9

1:50 74.1 73.8 74.1 75.1 75.0 75.4 77.3

2:20 74.1 74.1 74.3 75.5 75.3 75.9 79.2

2:50 74.1 74.3 74.5 76.0 75.7 76.3 80.5

3:50 74.2 74.6 74.8 79.2 76.9 77.3 82.4

4:20 74.2 74.7 74.9 83.1 79.7 76.5 84.5

5:20 74.3 74.9 75.0 91.1 91.0 84.1 95.7

6:20 74.4 75.0 75.1 91.0 85.0 80.2 89.4

7:20 74.4 74.9 75.3 91.0 84.6 79.4 89.7

8:20 74.5 75.0 75.5 110.2 94.1 88.6 115.6

9:20 74.8 76.2 75.6 106.2 92.4 85.6 112.6

10:20 74.7 75.5 75.9 105.1 92.6 84.7 115.9

20:20 75.4 76.9 79.1 119.0 102.5 89.8 101.9

35:20 76.3 81.5- 81.4 133.1 121.3 107.7 106.0

60:21 76.6 88.1 81.2 141.1 130.4 113.9 107.0

105:20 77.4 94.3 80.9 132.0 132.0 116.8 108.0

150:20 78.8 96.2 82.1 118.2 123.9 118.0 107.8

30
TABLE 10

Cable Tray Temperatures (OF)

Tray 4

Time (Min:Sec) T. C. Locations

1 2 3 4 5 6 7

Pretest 73.8 73.7 74.2 74.2 73.4 74.0 73.7

2:23 74.4 73.0 74.6 74.9 73.1 73.9 73.9

4:23 74.7 73.7 75.2 78.4 72.9 73.9 74.3

7:23 79.0 75.8 75.3 84.9 71.5 73.9 75.4

20:23 89.1 77.0 75.5 127.1 66.5 74.2 81.3

30:23 96.3 83.8 81.8 130.4 64.8 74.5 83.5

35:23 99.2 83.1 79.7 128.9 62.2 75.1 87.3

40:23 102.4 84.8 80.5 127.9 61.4 75.5 89.0

60:24 111.3 89.7 83.2 129.7 56.0 76.9 93.4

105:23 120.6 96.7 87.5 114.9 42.9 77.9 95.7

150:23 120.7 98.0 89.7 104.5 44.4 79.2 95.4

31
TABLE 11

Cable Tray Temperatures (OF)

Tray 5

Time (Min:Sec) T. C. Locations

3 4 5

Pretest

6:24

14:24

20:24

35:24

60:24

1

73.6

73.9

74.2

74.7

76.3

79.0

2

73.7

75.2

78.8

83.8

91.3

95.3

6 7

32
TABLE 12 - Summary of Cable Damage

Tray

No.

2

3

4

5

Description

Cable material at bottom of bundle loop

charred.

Cable material of all cables in contact

tray rung melted.

Cable material at bottom of bundle loop

tray side channels melted and charred.

amount of cable damage occurred in tray

Cable material at bottom of bundle loop

and charred.

No cable damage observed.

melted and

with bottom

and along

Greatest

3.

melted

33
TABLE 13 - Results of Air-Oven Tests of Dummy Sprinklers

Spr inkler

No.

IC

2A

2B

2C

3A

3B

3C

Operation

Time (Min:Sec)

2:50

3:40

3:10

3:38

3:10

3:36

3:12

Temp (OF±/C)

250/121

272/133

260/127

265/129

260/127

265/129

262/128

34
TABLE 14 - Summary of Cable Tray Temperatures

MAXIMUM TEMPERATURES

WITHIN CABLE TRAY

TRAY

No.

1

2

3

4

5

T. C.

Location

2

6

4

4

6

Temperature

(°F/°C)

133/56

135/57

141/61

130/55

99/37

Time

(Min:Sec)

40:00

18:00

60:00

25:00

78:00

35
r 60o 1

DETAIL' B'

o 0 

AI 0 :

DETAIL 'B'

N

n .DETAIL 'A'

0 0

L-/• - 1 6--'-

/

-•---' TR- J " " I .A4 '

_i4 - . . . . .

.t i 3" r .. ,2" • E

STEEL PAN

.L

DETAIL 'C'

* ACTIVE SPRINKLER IAEAD

O 'DUMMY' SPRINKLER HEND

® SMOKE DETECTOR

DETAIL '0'

tA

-.- 18' :- --- --

wiAI oSD* - __

-..-. . ... - .-I

:rSMOKE DETECTORS

-502f. T.

5ECTION (_CQ '

WAIIS OF OPLN-CORNER STRUCTURE

CONSIST Of' y"THICK MINERAL COMPOSITION BOAR BDOLIV-D TO A STEEL

FRAtATC\fORK. CL:ILINC, OF STPUCTURr

(ON't,r'TED OF" y"TITIICK MINITRAL COIPOSI1ION UNITS RI-fCINIG 014 A 4•FW'4

FT. STEEL GRID WITIIOUT- AITACTI-MENT. _1ý.V

':ýECTION XAX 5cL C.:_ON .b.1-5

Fiqure 1. Test Assembly
7K

-J

I-

~~~~1

B

1 -..

B

B -A

----V.

A

XiI -4 STEEL STRAP

SPACED 12"O.C.

I_

1>- -IN>

* A

--Il

-f

Y

.1

t\j

SECTI10N A-A

t- .................. ,- ; " . ... .. ... 1 ,

Ii II

SECTION B-B

CABLE TRAY

INSULATION

CAB3LE -FrRAY NOS.1, 4& 5 CAB5LE TRAY NOS. 2.&3

Figure 2. Insulation Assembly

w

•4
LIV

I,

7

-0

4

* T/C Location

Top Surface of Cable

Front Cable Tray

2YII

Fu 3

Figure 3. Cable Tray Thermocouple Locations

38
j-DETAIL'C~'

I17

I DETAIL B'1-

" 7ý-11 0 ~~ I ~DETAIL'~~43

~vr SECT IOCN

0 SPRINKLER LOCATION

C)EVAIL' -)ETAIL'13' EDLIAIL 'C'

Figure 4. Air Thermocouple Locations
Figure 5. Test Assembly Prior to Test

40
Figure 6. Test Assembly at Ten Seconds

41
~2>~

p

3 ̧

I

Figure 7. Test Assembly at Ninety Seconds

42
28O240-

220-

/00--.

160-

'140-

12011 SPRINKLER 2

2 O--

' I:• l , , T I ' I I , , j

5 J0 I? O 25" SO

Time (Min.)

Figure 8. Air Temperature Versus Time (Sprinkler 2)
.1Ah

/11O

SPRINKLER 1

rx4

0

4J-

/20O

-

/00

SPRINKLER 3

4ý11

20

0

I0 Rs so 95

Time (Min.)

Figure 9. Air Temperature Versus Time (Sprinklers 1 &;3)
©> (Tray 1-3)

44

0)

4J

(d

.@ (Tray 3)

@ (Tray 2-4)

•200

20 -' .- 55 Time (Min.)

Figure i0. Air Temperature Versus Time

)

A.
Figure 11. Tray 3 After Test

46
Figure 12. Tray 3 After Test

47
iii

A 

V

Als

•i• ,•. •/ • .. ... , . ..

A• .i t : . • -, . . . .!

Fiue1 Ta ftrTs
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