1 / 5

Product

Flexible coil-lead & festoon cableBS 6195 Types 4A / 4C / 4D0.6/1 kV to 6.35/11 kV90 °C · 110 °C · 150 °C

BS 6195 Type 4A / 4C / 4D Flexible Coil-Lead and Festoon CableSingle-core 0.6/1 to 6.35/11 kV EPR, EVA and silicone coil-lead and festoon cables

British Standard BS 6195 single-core flexible cables (Type 4A 90 °C EPR/CSP, Type 4C 150 °C silicone/glass-braid, Type 4D 110 °C EVA/EPR) from 600/1000 V to 6350/11000 V for motor/transformer leads, crane festoons and reeling connections.

Outdoor & humid
Oil-resistant
Flame-retardant
Ozone, UV & moisture
Versions
Order designation
BS 6195 Type 4A Cat.3 1×70
Outer Ø max
19.6 mm
Weight ≈
910 kg/km
Nominal wall
3.2 mm
Min. bend R
118 mm
All sizes (20)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Voltage grades
0.6/1–6.35/11 kV
Cat. 2 (1 kV), 3 (3.3), 4 (6.6), 5 (11)
Thermal classes
90/110/150 °C
4A EPR/CSP · 4D EVA · 4C Silicone/glass
Conductor range
1.5–630 mm²
1C Class 5 tinned copper
Bending radius
6 × OD
min. fixed & festoon loop routing
Low temperature
−40 to −60 °C
−40 °C Type 4A/4D · −60 °C Type 4C
Configurations
20
Cat. 2 (1 kV) to Cat. 5 (11 kV)

Typical values for this cable type, based on BS 6195 — confirmed in the datasheet and quotation for your order.

Application fit

Is BS 6195 Type 4A / 4C / 4D right for your machine?

BS 6195 Types 4A, 4C and 4D are flexible single-core cables designed for HV/LV rotating machine and transformer coil leads, crane festoon loops and slip-ring collector connections.

Fixed installation

Suitable

Primary duty: flexible coil-end leads for HV/LV motors, generators, transformers and varnish-impregnated windings.

Festoon & line chain

Suitable

Supported single-core festoon loops, slip-ring collector leads and crane busbar jumper connections.

Cylindrical / multi-layer drum

With conditions

Suitable for short-stroke low-tension single-core connections; not reinforced for long high-pull crane reels.

Use NTSCGEWÖU for MV Drum Reeling
Typical machinesHV & LV electric motor manufacturingPower & traction transformersSteelworks & crane festoon jumpersSlip-ring & collector gear leadsGenerators, alternators & test bays

Construction

Layer by layer

Shown: BS 6195 Type 4A / 4D single-core construction with Class 5 tinned copper conductor, separator tape and bonded EPR/CSP (Type 4A) or EVA/EPR (Type 4D) dual-layer wall; Type 4C uses silicone rubber insulation with lacquered glass-fibre braid.

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Flexible tinned copper conductorElectrolytic tinned annealed copper, finely stranded Class 5BS EN 60228 / IEC 60228 Class 5 (1.5 to 630 mm²)
2Conductor separator tapeNon-hygroscopic polyester or semi-conducting tape (on HV categories ≥ 3.3 kV)Prevents compound adhesion and equalises conductor surface stress
3Primary elastomeric insulationType 4A: EPR (GP4) · Type 4C: Silicone rubber (EI2) · Type 4D: EVA / high-temp EPRBS 7655 / BS 6195 radial thickness graded by Voltage Category 2, 3, 4 or 5
4Composite outer sheath / glass braidType 4A: CSP/HOFR elastomer (90 °C) · Type 4D: EVA elastomer (110 °C) · Type 4C: heat-resistant glass-fibre braid + varnish (150 °C)Resists coil impregnation varnishes, baking ovens, mineral oil and flame propagation

BS 6195 Type 4A (90 °C)

EPR insulation + CSP (chlorosulphonated polyethylene / HOFR) composite sheath · −40 to +90 °C continuous

BS 6195 Type 4D (110 °C)

High-temperature EPR/EVA insulation and sheath for Class B/F varnish baking · −40 to +110 °C continuous

BS 6195 Type 4C (150 °C)

Silicone rubber insulation with heat-resistant lacquered glass-fibre braid · −60 to +150 °C (up to +180 °C peak)

Types in this range

Category 2 · 600/1000 V — Cross-sectionTypes 4A / 4C / 4D · 600/1000 VCategory 2 · 600/1000 V

LV coil leads, festoon jumpers & motor terminations · 1.5–400 mm²

LV motors, transformers & festoon loops

Datasheet
Category 3 · 1900/3300 V — Cross-sectionTypes 4A / 4C / 4D · 1.9/3.3 kVCategory 3 · 1900/3300 V

3.3 kV motor stator/rotor leads & transformer tails · 6–400 mm²

3.3 kV rotating machines & switchgear

Datasheet
Category 4 · 3800/6600 V — Cross-sectionTypes 4A / 4C / 4D · 3.8/6.6 kVCategory 4 · 3800/6600 V

6.6 kV MV coil leads & crane collector jumpers · 16–500 mm²

6.6 kV motors, generators & unit transformers

Datasheet
Category 5 · 6350/11000 V — Cross-sectionTypes 4A / 4C / 4D · 6.35/11 kVCategory 5 · 6350/11000 V

11 kV HV machine coil leads & transformer bushings · 25–630 mm²

11 kV winders, alternators & traction transformers

Datasheet

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on BS 6195. Values for your order are confirmed in the datasheet and quotation.

Electrical

Voltage categories (U0/U)
0.6/1, 1.9/3.3, 3.8/6.6 & 6.35/11 kV
AC test voltage (5 min)
3 / 10 / 16 / 24 kV AC (Cat. 2 / 3 / 4 / 5)
Conductor DC resistance
BS EN 60228 / IEC 60228 Class 5 tinned
Current rating basis
BS 7671 / ERA 69-30 (free air at 30 °C)

Thermal

Continuous temp. (Type 4A)
−40 to +90 °C (EPR / CSP)
Continuous temp. (Type 4D)
−40 to +110 °C (EVA / EPR)
Continuous temp. (Type 4C)
−60 to +150 °C (+180 °C peak, Silicone/Glass)
Short-circuit temperature (5 s)
+250 °C (4A/4D) · +350 °C (4C)

Mechanical

Min. bending radius
6 × OD (fixed & festoon loops)
Conductor flexibility
Class 5 flexible tinned copper
Max. pulling tension
15 N/mm² of copper cross-section

Resistance

Oil & varnish resistance
EN 60811-404 & impregnating varnish resistant
Flame retardance
BS EN / IEC 60332-1-2
Halogen & smoke (Type 4C/4D)
Halogen-free EVA (4D) & silicone/glass (4C)

Reference standards

Construction standard
BS 6195 (Types 4A, 4C & 4D)
Conductor standard
BS EN 60228 / IEC 60228 Class 5
Insulation & sheath compounds
BS 7655 GP4/EI2/GP6 & HOFR/EVA

Identification

Outer surface colour
Black (4A/4D) · Red-brown/white (4C)
Voltage category coding
Cat. 2 (1 kV), 3 (3.3), 4 (6.6), 5 (11 kV)
Customs tariff (HS)
8544.49 (≤ 1 kV) / 8544.60 (> 1 kV)

Sizes

20 standard sizes across Categories 2 to 5 (0.6/1 kV to 6.35/11 kV)

Nominal dimensions per BS 6195 for single-core Types 4A, 4D and 4C.

Dimensions & weights
Order designationCategory & U0/UCores × mm²Nominal wall
mm		Outer Ø max
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
mm		Enquiry
Category 2 · 600/1000 V
BS 6195 Type 4A Cat.2 1×2.5Cat.2 · 0.6/1 kV1 × 2.51.45.5244833
BS 6195 Type 4A Cat.2 1×6Cat.2 · 0.6/1 kV1 × 61.67.4589844
BS 6195 Type 4A Cat.2 1×16Cat.2 · 0.6/1 kV1 × 161.810.215421561
BS 6195 Type 4A Cat.2 1×35Cat.2 · 0.6/1 kV1 × 352.013.433643080
BS 6195 Type 4A Cat.2 1×70Cat.2 · 0.6/1 kV1 × 702.217.5672810105
BS 6195 Type 4A Cat.2 1×120Cat.2 · 0.6/1 kV1 × 1202.421.61,1521,340130
BS 6195 Type 4A Cat.2 1×240Cat.2 · 0.6/1 kV1 × 2402.829.22,3042,610175
Category 3 · 1900/3300 V
BS 6195 Type 4A Cat.3 1×16Cat.3 · 1.9/3.3 kV1 × 163.213.015428578
BS 6195 Type 4A Cat.3 1×35Cat.3 · 1.9/3.3 kV1 × 353.215.833651095
BS 6195 Type 4A Cat.3 1×70Cat.3 · 1.9/3.3 kV1 × 703.219.6672910118
BS 6195 Type 4A Cat.3 1×120Cat.3 · 1.9/3.3 kV1 × 1203.223.41,1521,450140
BS 6195 Type 4A Cat.3 1×240Cat.3 · 1.9/3.3 kV1 × 2403.430.62,3042,740184
Category 4 · 3800/6600 V
BS 6195 Type 4A Cat.4 1×25Cat.4 · 3.8/6.6 kV1 × 255.018.2240490109
BS 6195 Type 4A Cat.4 1×50Cat.4 · 3.8/6.6 kV1 × 505.021.4480790128
BS 6195 Type 4A Cat.4 1×95Cat.4 · 3.8/6.6 kV1 × 955.025.49121,310152
BS 6195 Type 4A Cat.4 1×185Cat.4 · 3.8/6.6 kV1 × 1855.030.81,7762,290185
Category 5 · 6350/11000 V
BS 6195 Type 4A Cat.5 1×35Cat.5 · 6.35/11 kV1 × 357.624.8336890149
BS 6195 Type 4A Cat.5 1×70Cat.5 · 6.35/11 kV1 × 707.628.46721,340170
BS 6195 Type 4A Cat.5 1×120Cat.5 · 6.35/11 kV1 × 1207.632.21,1521,920193
BS 6195 Type 4A Cat.5 1×240Cat.5 · 6.35/11 kV1 × 2407.639.02,3043,280234
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Other BS 6195 cross-sections from 1.5 mm² up to 630 mm² across Categories 2, 3, 4 and 5 are manufactured to order.
  • Type 4A (90 °C EPR/CSP), Type 4D (110 °C EVA) and Type 4C (150 °C Silicone + glass braid) share identical BS 6195 radial wall thicknesses per category.

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
AC high-voltage water immersion test3 kV (Cat.2), 10 kV (Cat.3), 16 kV (Cat.4), 24 kV (Cat.5) for 5 minEvery manufactured length
Conductor DC resistanceBS EN 60228 / IEC 60228 Class 5 tinned copperEvery length
Sample tests
Coil varnish & baking compatibility testThermal ageing and solvent resistance per BS 6195 / BS 7655Per compound batch
Oil immersion & vertical flame propagationEN 60811-404 · BS EN / IEC 60332-1-2Per batch

Inspection certificate

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

Product approvals

BS 6195 Types 4A / 4C / 4DCE · LVDRoHS · REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX BS 6195 TYPE 4A CAT 3 1900/3300 V 1x70 mm² · [year] · [metre mark]
Delivery form
Non-returnable export timber drums or coils, cut-to-length
Packaging
ISPM-15 heat-treated timber drums with sealed moisture-proof ends

Technical documents

Downloads

PDFBS 6195 Type 4A / 4C / 4D Flexible Coil-Lead and Festoon Cable – technical datasheet20 sizes · construction, technical data, approvalsXLSXBS 6195 Type 4A / 4C / 4D spec data (Excel)All 20 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 do BS 6195 Type 4A, Type 4C and Type 4D differ in insulation and temperature rating?
All three types use Class 5 flexible tinned copper conductors to BS EN 60228, but differ in thermal class to match machine insulation systems: Type 4A uses EPR insulation with a CSP outer sheath for −40 to +90 °C (Class Y/A/E); Type 4D uses halogen-free EVA/EPR for −40 to +110 °C (Class B/F varnish baking); and Type 4C uses silicone rubber with a lacquered glass-fibre braid for −60 to +150 °C (Class H).
What voltage categories are defined in BS 6195 for single-core coil leads?
BS 6195 grades radial insulation thickness by system voltage and fault-clearing category: Category 2 is rated 600/1000 V (3 kV AC test), Category 3 is rated 1900/3300 V (10 kV AC test), Category 4 is rated 3800/6600 V (16 kV AC test), and Category 5 is rated 6350/11000 V (24 kV AC test).
Why are BS 6195 cables specified for motor and transformer winding terminations?
Unlike standard power cables whose sheaths swell, crack or bleed plasticiser during vacuum-pressure varnish impregnation (VPI) and oven curing, BS 6195 Type 4A, 4C and 4D compounds are formulated to withstand impregnating varnishes, baking temperatures and transformer oil while remaining flexible enough for tight terminal-box routing.
Can BS 6195 Type 4A/4D be used on crane festoons or high-speed reeling drums?
BS 6195 single-core cables are suitable for supported festoon loops, slip-ring collector leads and short flexible jumper connections with a minimum bending radius of 6 × OD. They do not contain an anti-torsion braid or metallic phase screen, so for motorized multi-core drum reeling select NSHTÖU (0.6/1 kV) or NTSCGEWÖU (3.6/6–20/35 kV).

Request a quote

Get an engineering quote for BS 6195 Type 4A / 4C / 4D

Your selection and application details are copied into the enquiry form below.

01Selected sizes

Use + Add next to a size or configuration.

02Reel & motion

Add your operating conditions here to include them in your enquiry.

03Message for our engineers

BS 6195 Type 4A / 4C / 4D Flexible Coil-Lead and Festoon Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:
Send via WhatsApp

MV reeling

NTSCGEWÖU

3-core + split-earth MV reeling cable · 1.8/3 to 20/35 kV DIN VDE 0250-813

View productCopper-screened MV

(N)TSCGECEWÖU

Individually copper-screened MV flexible cable · 3.6/6 to 12/20 kV

View productLV reeling & festoon

NSHTÖU

Multi-core rubber reeling & festoon cable · 0.6/1 kV DIN VDE 0250-814

View product
DatasheetRequest a quote