Firetuf 300/500V Multicore
Solid Conductor Type (Class
1 to BS 6360)
|
Cable Ref
|
Insulated Phase
Cores
|
Protective Earth
Conductor
|
Nominal Sheath thickness
mm
|
Nominal Overall
Diameter
mm
|
Approx. Nett weight
mm
|
Resistance
W/km
|
No. of Cores
|
Conductor
|
Nominal Insulation
Thickness
mm
|
CSA
mm2
|
Strand No/mm
|
CSA
mm2
|
Strand No/mm
|
FTZ 2E 1.0
|
2
|
1.0
|
1/1.13
|
0.6
|
1.0
|
1/1.13
|
0.9
|
7.0
|
83
|
18.10
|
FTZ 3E 1.0
|
3
|
1.0
|
1/1.13
|
0.6
|
1.0
|
1/1.13
|
0.9
|
7.3
|
95
|
18.10
|
FTZ 4E 1.0
|
4
|
1.0
|
1/1.13
|
0.6
|
1.0
|
1/1.13
|
1.0
|
8.2
|
115
|
18.10
|
FTZ 7E 1.0
|
7
|
1.0
|
1/1.13
|
0.6
|
1.0
|
32/0.2
|
1.0
|
10.5
|
175
|
18.10
|
FTZ 12E 1.0
|
12
|
1.0
|
1/1.13
|
0.6
|
1.0
|
32/0.2
|
1.1
|
13.5
|
275
|
18.10
|
FTZ 19E 1.0
|
19
|
1.0
|
1/1.13
|
0.6
|
1.0
|
32/0.2
|
1.2
|
15.7
|
405
|
18.10
|
|
|
|
|
|
|
|
|
|
|
|
FTZ 2E 1.5
|
2
|
1.5
|
1/1.38
|
0.7
|
1.5
|
1/1.38
|
0.9
|
7.9
|
110
|
12.10
|
FTZ 3E 1.5
|
3
|
1.5
|
1/1.38
|
0.7
|
1.5
|
1/1.38
|
0.9
|
8.3
|
128
|
12.10
|
FTZ 4E 1.5
|
4
|
1.5
|
1/1.38
|
0.7
|
1.5
|
1/1.38
|
1.0
|
9.5
|
160
|
12.10
|
FTZ 7E 1.5
|
7
|
1.5
|
1/1.38
|
0.7
|
1.5
|
30/0.25
|
1.1
|
12.2
|
250
|
12.10
|
FTZ 12E 1.5
|
12
|
1.5
|
1/1.38
|
0.7
|
1.5
|
30/0.25
|
1.2
|
15.7
|
390
|
12.10
|
FTZ 19E 1.5
|
19
|
1.5
|
1/1.38
|
0.7
|
1.5
|
30/0.25
|
1.3
|
18.2
|
560
|
12.10
|
|
|
|
|
|
|
|
|
|
|
|
FTZ 2E 2.5
|
2
|
2.5
|
1/1.78
|
0.8
|
2.5
|
1/1.78
|
1.0
|
9.3
|
160
|
7.41
|
FTZ 3E 2.5
|
3
|
2.5
|
1/1.78
|
0.8
|
2.5
|
1/1.78
|
1.0
|
9.9
|
190
|
7.41
|
FTZ 4E 2.5
|
4
|
2.5
|
1/1.78
|
0.8
|
2.5
|
1/1.78
|
1.1
|
11.3
|
235
|
7.41
|
FTZ 7E 2.5
|
7
|
2.5
|
1/1.78
|
0.8
|
2.5
|
50/0.25
|
1.2
|
14.6
|
375
|
7.41
|
FTZ 12E 2.5
|
12
|
2.5
|
1/1.78
|
0.8
|
2.5
|
50/0.25
|
1.4
|
19.5
|
610
|
7.41
|
FTZ 19E 2.5
|
19
|
2.5
|
1/1.78
|
0.8
|
2.5
|
50/0.25
|
1.5
|
22.8
|
900
|
7.41
|
Stranded Conductor Type
(Class 2 to BS 6360)
|
Cable Ref
|
Insulated Phase
Cores
|
Protective Earth
Conductor
|
Nominal Sheath thickness
mm
|
Nominal Overall
Diameter mm
|
Aprox. Nett weight
kg/km
|
Resistance
W/km
|
No. of Cores
|
Conductor
|
Nominal Insulation
Thickness
|
CSA
mm2
|
Strand No/mm
|
CSA
mm2
|
Strand No/mm
|
FTZ 2E7 1.0
|
2
|
1.0
|
7/0.44
|
0.6
|
1.0
|
7/0.44
|
0.9
|
7.2
|
90
|
18.10
|
FTZ 3E7 1.0
|
3
|
1.0
|
7/0.44
|
0.6
|
1.0
|
7/0.44
|
0.9
|
7.5
|
102
|
18.10
|
FTZ 4E7 1.0
|
4
|
1.0
|
7/0.44
|
0.6
|
1.0
|
7/0.44
|
1.0
|
8.8
|
125
|
18.10
|
FTZ 7E7 1.0
|
7
|
1.0
|
7/0.44
|
0.6
|
1.0
|
32/0.2
|
1.0
|
11.3
|
190
|
18.10
|
FTZ 12E7 1.0
|
12
|
1.0
|
7/0.44
|
0.6
|
1.0
|
32/0.2
|
1.1
|
14.5
|
295
|
18.10
|
FTZ 19E7 1.0
|
19
|
1.0
|
7/0.44
|
0.6
|
1.0
|
32/0.2
|
1.2
|
16.9
|
430
|
18.10
|
|
|
|
|
|
|
|
|
|
|
|
FTZ 2E7 1.5
|
2
|
1.5
|
7/0.53
|
0.7
|
1.5
|
7/0.53
|
0.9
|
8.4
|
125
|
12.10
|
FTZ 3E7 1.5
|
3
|
1.5
|
7/0.53
|
0.7
|
1.5
|
7/0.53
|
0.9
|
8.9
|
142
|
12.10
|
FTZ 4E7 1.5
|
4
|
1.5
|
7/0.53
|
0.7
|
1.5
|
7/0.53
|
1.0
|
10.2
|
177
|
12.10
|
FTZ 7E7 1.5
|
7
|
1.5
|
7/0.53
|
0.7
|
1.5
|
30/0.25
|
1.1
|
12.9
|
275
|
12.10
|
FTZ 12E7 1.5
|
12
|
1.5
|
7/0.53
|
0.7
|
1.5
|
30/0.25
|
1.2
|
16.7
|
427
|
12.10
|
FTZ 19E7 1.5
|
19
|
1.5
|
7/0.53
|
0.7
|
1.5
|
30/0.25
|
1.3
|
19.4
|
617
|
12.10
|
|
|
|
|
|
|
|
|
|
|
|
FTZ 2E7 2.5
|
2
|
2.5
|
7.0.67
|
0.8
|
2.5
|
7.0.67
|
1.0
|
9.7
|
175
|
7.41
|
FTZ 3E7 2.5
|
3
|
2.5
|
7.0.67
|
0.8
|
2.5
|
7.0.67
|
1.0
|
10.6
|
210
|
7.41
|
FTZ 4E7 2.5
|
4
|
2.5
|
7.0.67
|
0.8
|
2.5
|
7.0.67
|
1.1
|
12.3
|
265
|
7.41
|
FTZ 7E7 2.5
|
7
|
2.5
|
7.0.67
|
0.8
|
2.5
|
50/0.25
|
1.2
|
15.0
|
400
|
7.41
|
FTZ 12E7 2.5
|
12
|
2.5
|
7.0.67
|
0.8
|
2.5
|
50/0.25
|
1.4
|
19.8
|
640
|
7.41
|
FTZ 19E7 2.5
|
19
|
2.5
|
7.0.67
|
0.8
|
2.5
|
50/0.25
|
1.5
|
21.3
|
930
|
7.41
|
|
|
|
|
|
|
|
|
|
|
|
FTZ 2E7 4.0
|
2
|
4.0
|
7/0.85
|
0.8
|
4.0
|
7/0.85
|
1.1
|
11.1
|
243
|
4.61
|
FTZ 3E7 4.0
|
3
|
4.0
|
7/0.85
|
0.8
|
4.0
|
7/0.85
|
1.1
|
12.2
|
297
|
4.61
|
FTZ 4E7 4.0
|
4
|
4.0
|
7/0.85
|
0.8
|
4.0
|
7/0.85
|
1.2
|
13.8
|
365
|
4.61
|
|
|
|
|
|
|
|
|
|
|
|
FTZ 2E7 6.0
|
2
|
6.0
|
7/1.04
|
0.8
|
6.0
|
7/1.04
|
1.2
|
12.4
|
330
|
3.08
|
FTZ 3E7 6.0
|
3
|
6.0
|
7/1.04
|
0.8
|
6.0
|
7/1.04
|
1.3
|
14.5
|
415
|
3.08
|
FTZ 4E7 6.0
|
4
|
6.0
|
7/1.04
|
0.8
|
6.0
|
7/1.04
|
1.3
|
14.8
|
485
|
3.08
|
COLOUR CODING:
|
For 7, 12 and 19 core cables
colour coding will be by reference and marker
|
2 Core
|
Red/Black
|
7 Core
|
Centre
1st Layer
|
Red
Red, 4 Black & Blue
|
3 Core
|
Red/ Yellow / Blue
|
12 Core
|
Centre
1st Layer
|
Red, Black & Blue
Red, 7 Black & Blue
|
4 Core
|
Red / Yellow / Blue / Black
|
19 Core
|
Centre
1st Layer
2nd Layer
|
Red
Red, 4 Black & Blue
Red, 10 Black & Blue
|
Multipair 300/500V
|
Cable Ref
|
Insulated Phase
Cores
|
Drainwire
|
Nominal Sheath thickness
mm
|
Nominal Overall
Diameter
mm
|
Aprox. Nett weight
kg/km
|
No. of Pairs
|
Conductor
|
Nominal Insulation
Thickness
mm
|
CSA
mm2
|
Strand No/mm
|
CSA
mm2
|
Strand No/mm
|
FTZ 2P 1.0
|
2 (quad)
|
1.0
|
32/0.2
|
0.6
|
0.5
|
16/0.2
|
1.0
|
9.3
|
130
|
FTZ 5P 1.0
|
5
|
1.0
|
32/0.2
|
0.6
|
0.5
|
16/0.2
|
1.2
|
15.3
|
300
|
FTZ 10P 1.0
|
10
|
1.0
|
32/0.2
|
0.6
|
0.5
|
16/0.2
|
1.4
|
20.2
|
510
|
FTZ 15P 1.0
|
15
|
1.0
|
32/0.2
|
0.6
|
0.5
|
16/0.2
|
1.5
|
23.3
|
705
|
FTZ 20P 1.0
|
20
|
1.0
|
32/0.2
|
0.6
|
0.5
|
16/0.2
|
1.6
|
26.6
|
880
|
|
|
|
|
|
|
|
|
|
|
FTZ 2P 1.5
|
2 (quad)
|
1.5
|
30/0.25
|
0.7
|
0.5
|
16/0.2
|
1.0
|
10.4
|
165
|
FTZ 5P 1.5
|
5
|
1.5
|
30/0.25
|
0.7
|
0.5
|
16/0.2
|
1.3
|
18.4
|
440
|
FTZ 10P 1.5
|
10
|
1.5
|
30/0.25
|
0.7
|
0.5
|
16/0.2
|
1.5
|
23.6
|
700
|
FTZ 15P 1.5
|
15
|
1.5
|
30/0.25
|
0.7
|
0.5
|
16/0.2
|
1.7
|
27.5
|
965
|
FTZ 20P 1.5
|
20
|
1.5
|
30/0.25
|
0.7
|
0.5
|
16/0.2
|
1.8
|
31.4
|
1250
|
|
|
|
|
|
|
|
|
|
|
FTZ 2P 2.5
|
2 (quad)
|
2.5
|
50/0.25
|
0.8
|
0.5
|
16/0.2
|
1.2
|
12.3
|
245
|
FTZ 5P 2.5
|
5
|
2.5
|
50/0.25
|
0.8
|
0.5
|
16/0.2
|
1.4
|
21.8
|
585
|
FTZ 10P 2.5
|
10
|
2.5
|
50/0.25
|
0.8
|
0.5
|
16/0.2
|
1.7
|
27.9
|
1010
|
FTZ 15P 2.5
|
15
|
2.5
|
50/0.25
|
0.8
|
0.5
|
16/0.2
|
1.9
|
32.5
|
1420
|
FTZ 20P 2.5
|
20
|
2.5
|
50/0.25
|
0.8
|
0.5
|
16/0.2
|
2.0
|
34.1
|
1820
|
COLOUR CODING:
|
Pairs are Red, Black and individually
numbered.
|
Alternative colour
coding is available on request.
|
|
|
Cables in
this range can also be supplied with steel wire armour
protection. |
Single pair Firetuf cables are also available. For technical
details, refer to the multicore solid or stranded data
tables above. |
Screening
The use of helical aluminium tape closely
wrapped around the insulating cores gives improved screening,
resulting in improved security from external interference,
as indicated by testing to IEC 801-6 (DRAFT) 1990, Direct
Voltage Injection Method.
Over the frequency range 1-100MHz, attenuation
improvement of 30-35dB is achieved over unscreened cable.
|
|
Capacitance
Firetuf cables have a much lower core to core
and core to screen
capacitance than other conventional fire resistant cables.
The growth of systems allowing longer cable runs makes Firetuf
ideal
for fire alarm circuits where low capacitance is vital. Typical
mutual
and earth capacitance figures for each conductor size are
as follows:
Phase Conductor CSA (mm2)
|
Capacitance Core-Core (pF/metre)
|
Capacitance Core-Screen (pF/metre)
|
1.0
|
100
|
175
|
1.5
|
102
|
180
|
2.5
|
115
|
205
|
4.0
|
125
|
230
|
6.0
|
140
|
260
|
Current Ratings and Associated Voltage
Drop
BS 7629 limits maximum conductor temperature
(unless enclosed) to 70°C. Where 90°C is permitted refer
to IEE wiring regulations.
|
Phase conductor CSA
mm2
|
Reference Method 1* (Clipped Direct)
|
Reference Method 3* (enclosed)
|
one twin cable with protective
conductor single phase ac or dc
|
one 3 or 4 core cable with protective
conductor, 3 phase
|
one twin cable with protective
conductor single phase ac or dc
|
one 3 or 4 core cable with protective
conductor, 3 phase
|
current rating
A
|
volt drop per amp per metre
mV
|
current rating
A
|
volt drop per amp per metre
mV
|
current rating
A
|
volt drop per amp per metre
mV
|
current rating
A
|
volt drop per amp per metre
mV
|
1.0
|
15
|
44
|
13.5
|
38
|
13.5
|
44
|
11.5
|
38
|
1.5
|
19.5
|
29
|
17.5
|
25
|
16.5
|
29
|
15
|
25
|
2.5
|
27
|
18
|
24
|
15
|
23
|
18
|
20
|
15
|
4.0
|
36
|
11
|
32
|
9.5
|
30
|
11
|
27
|
9.5
|
6.0
|
46
|
7.3
|
41
|
6.4
|
38
|
7.3
|
34
|
6.4
|
*As defined in Appendix 4 of BS 7671, the IEE Wiring Regulations,
16th Edition. Conductor operating temperature: 70°C. Ambient
temperature: 30°C.
Rating Factors
Conductor operating temperature 70ºC
|
For ambient temperature
- overload protection by a fuse to BS 88 or BS 1371.
|
Ambient temp. (°C)
Rating factor
|
25
1.03
|
30
1.00
|
35
0.94
|
40
0.87
|
45
0.79
|
50
0.71
|
55
0.61
|
60
0.50
|
65
0.35
|
For grouping
|
Number of cables
Rating factor
|
2
0.80
|
3
0.70
|
4
0.65
|
5
0.60
|
6
0.57
|
8
0.52
|
10
0.48
|
12
0.45
|
14
0.43
|
16
0.41
|
18
0.39
|
20
0.38
|
L/R Ratio
|
mm2
|
µH/W
|
1.0
|
25
|
1.5
|
40
|
2.5
|
50
|
4.0
|
65
|
6.0
|
90
|
|