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Product

instrumentation cable seriesBS 7917 / IEC 60331Mica + EPR Fire BarrierESD & Fire/Gas Loops

BS 7917 AIS FR / ACS FR Armoured Offshore Instrumentation CableMica-glass + EPR fire-resistant (180 min @ 750/950 °C) armoured offshore instrumentation

BS 7917 AIS FR and ACS FR Armoured Fire-Resistant Offshore Instrumentation Cable with phlogopite mica-glass fire-barrier tape + GP4 EPR insulation, individual/overall Al/PET screens, galvanized steel wire braid armour and SW4 LSZH.

IEC 60331 Fire Integrity
SW4 Oil & Mud Resistant
AIS FR / ACS FR Screen
BS 7917 UKOOA
Order designation
BS 7917 AIS FR 5P×1.0
Outer Ø ≈
21.4 mm
Weight ≈
685 kg/km
Conductor DC R
18.2 Ω/km
Min. bend radius
171 mm
All sizes (6)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Standard
BS 7917:1999
Fire-resistant UKOOA offshore
Fire survival
180 min @ 750 °C
IEC 60331-21 & BS 6387 CWZ
Voltage rating
150/250 V
600/1000 V option available
Fire barrier
Mica + GP4 EPR
Phlogopite glass-mica + EPR
Armour & sheath
GSWB + SW4 LSZH
Galvanized steel braid + SW4
Temperature
-40 to +90 °C
Continuous fixed service

Typical values for this cable type, based on BS 7917 / IEC 60331-21 / UKOOA — confirmed in the datasheet and quotation for your order.

Application fit

Is BS 7917 AIS FR / ACS FR right for your machine?

Maintains 180-minute circuit integrity during active offshore hydrocarbon/cellulosic fires with water deluge and mechanical shock.

Offshore platform & shipboard deck trays

Suitable

Essential for offshore Emergency Shutdown (ESD), Fire & Gas (F&G) detection, and deluge release loops.

Fixed installation

Suitable

Routes across topside blast walls, turbine enclosures, and hazardous Zone 1/2 process modules.

Switchgear & control cabinet wiring

Suitable

AIS FR individual pair screens protect critical SIL-2/SIL-3 safety instrumented system (SIS) signals.

Energy chain / drag chain

Not suitable

Fixed fire-survival cable with mica-glass tape; not for continuous flexing in drag chains.

Use PUR-HF Drag-Chain Cable
Typical machinesOffshore Emergency Shutdown (ESD) SystemsFire & Gas (F&G) & Deluge Control LoopsFPSO & Drilling Rig BOP Safety CircuitsLNG Terminal & Refinery SIS LoopsOffshore Wind Converter Platform Fire Loops

Construction

Layer by layer

BS 7917 AIS FR / ACS FR showing Class 2/5 tinned copper conductors, helical phlogopite mica-glass fire tape, GP4 EPR insulation, Al/PET foil screens with tinned drain wires, SW4 inner bedding, GSWB armour, and SW4 LSZH outer sheath.

123456
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Tinned annealed copper conductorsClass 2 stranded (7-wire) or Class 5 flexible tinned copper per BS EN 60228 (0.75, 1.0, 1.5, 2.5 mm²)Maintains conductivity under +950 °C flame test
2Phlogopite mica-glass fire barrierOverlapped helical wrap of silicone-bonded phlogopite mica-glass tape applied directly over each conductorVitrifies into a dielectric ceramic shell at +750/+950 °C
3GP4 / GP5 EPR thermoset insulationEthylene Propylene Rubber (EPR Type GP4 per BS 7655-1.2) extruded over the mica tape150/250 V or 600/1000 V primary dielectric
4Collective (ACS FR) or Individual + Collective (AIS FR) screenAluminium/PET tape with 0.50 mm² tinned copper drain wire100 % EMI screening for SIL-3 ESD & F&G signals
5SW4 bedding + Galvanized Steel Wire Braid (GSWB)Halogen-free SW4 bedding + high-coverage galvanized steel wire braid armourWithstands mechanical shock and fire hose impact (BS 6387 W/Z)
6SW4 Fire-Resistant Offshore Outer SheathCross-linked LSZH oil/mud-resistant elastomer Type SW4 per BS 7655-2.6 (Grey, Blue Ex i, or Red F&G)IEC 60332-3-22 Cat A & HCl < 0.5 %

BS 7917 ACS FR (Collectively Screened)

Mica + EPR pairs/triads + overall Al/PET screen + GSWB armour + SW4 sheath (UKOOA F-codes)

BS 7917 AIS FR (Individually & Collectively Screened)

Mica + EPR pairs/triads + individual & overall screens + GSWB armour + SW4 sheath

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on BS 7917 / IEC 60331-21 / UKOOA. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage (Uo/U)
150/250 V (instrumentation) · 600/1000 V (control)
Max. DC resistance @ 20 °C
24.8 Ω/km (0.75) · 18.2 Ω/km (1.0) · 12.2 Ω/km (1.5) · 7.56 Ω/km (2.5)
Mutual capacitance
≤ 120 pF/m (ACS FR) · ≤ 150 pF/m (AIS FR)
L/R ratio
≤ 25 µH/Ω (0.75–1.0 mm²) · ≤ 40 µH/Ω (1.5 mm²)

Thermal

Operating temperature
-40 °C to +90 °C
Fire survival rating
+750 °C for 180 min (IEC 60331-21) & +950 °C (BS 6387 Cat C)
Short-circuit temperature
+250 °C (5 s)

Mechanical

Min. bend radius
8 × OD (fixed installation)
Fire with mechanical shock
BS 6387 Category Z (+950 °C + 15 s hammer blows) & EN 50200
Fire with water spray
BS 6387 Category W (+650 °C + 15 min water sprinkler)

Resistance

Circuit integrity in fire
IEC 60331-21 / IEC 60331-31 & BS 6387 CWZ
Bunched flame & LSZH
IEC 60332-3-22 Cat A, IEC 60754-1 & IEC 61034-2
Oil & drilling fluid
BS 7655-2.6 Type SW4 hot oil & fuel resistant

Reference standards

Primary design standard
BS 7917 & UKOOA Fire-Resistant Code
Fire test standards
IEC 60331-21, BS 6387 CWZ & IEC 60332-3-22
RoHS & REACH
2011/65/EU & EC 1907/2006 compliant

Identification

Core identification
Pairs: Black & White numbered · Triads: Black, White & Red
Outer sheath colour
Grey, Light Blue (Ex i), or Red/Orange (Fire & ESD)
Customs tariff (HS)
8544.4993

Sizes

6 standard BS 7917 ACS FR & AIS FR 150/250 V fire-resistant sizes

Nominal dimensions, UKOOA codes and weights for BS 7917 mica-insulated wire-braid armoured offshore cables.

Dimensions & UKOOA weights
Order designationUKOOA code & pairsOuter Ø ≈
mm		Weight ≈
kg/km		Max. DC R
Ω/km		Min. bend R
mm		Enquiry
BS 7917 ACS FR — Collectively Screened
BS 7917 ACS FR 1P×1.0FJK01 · 1 Pair 1.0 mm²11.621518.293
BS 7917 ACS FR 2P×1.0FJK02 · 2 Pair 1.0 mm²15.234518.2122
BS 7917 ACS FR 5P×1.5FJL05 · 5 Pair 1.5 mm²21.873012.2174
BS 7917 AIS FR — Individually & Collectively Screened
BS 7917 AIS FR 2P×1.0FJQ02 · 2 Pair 1.0 mm²16.038518.2128
BS 7917 AIS FR 5P×1.0FJQ05 · 5 Pair 1.0 mm²21.468518.2171
BS 7917 AIS FR 10P×1.5FJR10 · 10 Pair 1.5 mm²29.21,29012.2234
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Mica-glass tape slightly increases core diameter compared to BS 6883; verify gland inner sealing ring range against BS 7917 tables.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
1.5 kV / 3.5 kV AC dielectric & conductor resistance test5 min AC withstand without breakdownEvery drum length
Sample tests
IEC 60331-21 & BS 6387 CWZ fire-survival test3 h @ 750 °C + 950 °C flame, water spray (W) and shock (Z) without fuse failureType approval
IEC 60332-3-22 Cat A bunched flame & SW4 oil testPass Cat A vertical ladder burn and BS 7655-2.6 hot oil immersionType approval

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

BS 7917 & UKOOA Fire-ResistantIEC 60331-21 & BS 6387 CWZRoHS 2 & REACH Compliant

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX BS 7917 UKOOA 150/250V AIS/ACS FR IEC 60331 GSWB SW4
Delivery form
Fumigated wooden drums, steel reels or precision spools
Standard lengths
500 m · 1000 m (or custom cut/spooled lengths)
MOQ
100 m (standard) · 500 m (custom)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFBS 7917 AIS FR / ACS FR Armoured Offshore Instrumentation Cable – technical datasheet6 sizes · construction, technical data, approvalsXLSXBS 7917 AIS FR / ACS FR spec data (Excel)All 6 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

How does BS 7917 maintain signal integrity during an active offshore fire?
When exposed to +750 °C to +950 °C fire temperatures, the outer EPR insulation pyrolyses into a conductive ash, but the overlapped phlogopite mica-glass tape wrapped directly around each tinned copper conductor sinters with its silicone binder into an inorganic ceramic dielectric sleeve, preventing short circuits even under deluge water spray and structural vibration.
What does UKOOA prefix 'F' signify compared to prefix 'Y'?
In the UKOOA offshore cable coding system, 'Y' designates flame-retardant cables to BS 6883 (e.g. YJQ05), while 'F' designates fire-resistant (circuit-integrity) cables to BS 7917 (e.g. FJQ05).
Can BS 7917 be ordered with a Red or Orange outer sheath for Fire & Gas loops, or Blue for Ex i?
Yes. Standard sheath colours are Grey (general safe area ESD), Light Blue (intrinsically safe Ex i), and Red or Orange (Fire & Gas detection circuits).
Does BS 7917 require special stripping tools for the mica tape?
Standard rotary insulation strippers remove the GP4 EPR insulation cleanly, after which the exposed mica-glass tape is unwound and trimmed at the gland or terminal block before crimping the ferrule.

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BS 7917 AIS FR / ACS FR Armoured Offshore Instrumentation Cable

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