BS7917 150/250V HF-EPR Insulated, SW2/SW4 Sheathed, Individually Screened Unarmoured Fire Resistant Instrumentation & Control Cables
Applications
BS7917 standard 150/250V HF-EPR Insulated, SW2/SW4 Sheathed, Individually Screened Unarmoured Fire Resistant Instrumentation & Control Cables are designed for fixed wiring in ships and on mobile offshore units, suitable for use in instrumentation, lighting and control circuits where fire integrity is essential.
Standards
- BS 7917
- IEC 60331-31 Fire resistant
- IEC 60332-3A Flame retardant
- IEC 60754-1; IEC 60754-2 Corrosivity
- IEC 61034-2 Smoke density
- Cold bend and impact (-40??C) (on request)
- CSA C22.2 No. 38-95 (on request)
Construction
| Conductor |
Tinned copper wire stranded circular cl. 2 BS 6360/IEC 60228 |
| Insulation |
Mica tape + HF-EPR GP4 according to BS 7655 1.2. |
| Lay-up |
Pairs, triples, quads. |
| Individual Screen |
Aluminium/polyester tape + drain wire tinned copper. |
| Sheath |
Halogen free thermosetting compound SW4 according to BS 7655 2.6 or reduced halogen thermosetting compound SW2 according to BS 7655 2.6. |
Mechanical and Thermal Properties
| Minimum Internal Bending Radius |
8??OD |
| Temperature Range |
-40°C ~ +90°C |
Dimensions and Weight
| Construction No. of cores??Cross section |
Nominal Insulation Thickness |
Nominal Sheath Thickness |
Minimum Overall Diameter |
Maximum Overall Diameter |
Approx. Weight |
| (mm2) |
mm |
mm |
mm |
mm |
kg/km |
| Multipair |
| 1??2??0.75 |
0.8 |
1.0 |
8.1 |
9.8 |
97 |
| 3??2??0.75 |
0.8 |
1.2 |
14.0 |
16.0 |
227 |
| 7??2??0.75 |
0.8 |
1.4 |
19.0 |
21.1 |
449 |
| 12??2??0.75 |
0.8 |
1.6 |
23.8 |
26.4 |
740 |
| 20??2??0.75 |
0.8 |
1.9 |
30.4 |
33.5 |
1183 |
| 27??2??0.75 |
0.8 |
2.0 |
34.6 |
37.9 |
1555 |
| 37??2??0.75 |
0.8 |
2.2 |
40.5 |
44.3 |
1846 |
| 1??2??1 |
0.8 |
1.0 |
8.5 |
10.3 |
108 |
| 3??2??1 |
0.8 |
1.3 |
15.0 |
17.0 |
264 |
| 7??2??1 |
0.8 |
1.4 |
20.0 |
22.5 |
522 |
| 12??2??1 |
0.8 |
1.7 |
25.4 |
28.0 |
865 |
| 20??2??1 |
0.8 |
1.9 |
32.1 |
35.3 |
1377 |
| 27??2??1 |
0.8 |
2.1 |
36.8 |
40.2 |
1814 |
| 37??2??1 |
0.8 |
2.3 |
43.0 |
47.0 |
2432 |
| Multitriple |
| 1??3??0.75 |
0.8 |
1.0 |
8.1 |
9.8 |
104 |
| 3??3??0.75 |
0.8 |
1.3 |
15.0 |
17.0 |
269 |
| 7??3??0.75 |
0.8 |
1.5 |
20.8 |
23.3 |
527 |
| 12??3??0.75 |
0.8 |
1.7 |
25.8 |
28.5 |
880 |
| 1??3??1 |
0.8 |
1.1 |
8.7 |
10.5 |
124 |
| 3??3??1 |
0.8 |
1.3 |
15.8 |
17.9 |
310 |
| 7??3??1 |
0.8 |
1.5 |
22.0 |
24.5 |
622 |
| 12??3??1 |
0.8 |
1.8 |
27.5 |
30.2 |
1032 |
| Multiquad |
| 1??4??0.75 |
0.8 |
1.1 |
9.1 |
10.9 |
137 |
| 3??4??0.75 |
0.8 |
1.4 |
17.4 |
19.5 |
366 |
| 7??4??0.75 |
0.8 |
1.6 |
23.5 |
26.1 |
725 |
| 1??4??1 |
0.8 |
1.1 |
9.6 |
11.4 |
148 |
| 3??4??1 |
0.8 |
1.4 |
18.4 |
20.6 |
413 |
| 7??4??1 |
0.8 |
1.6 |
24.9 |
27.6 |
843 |
