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Product

instrumentation cable seriesRCC-E K1 / Class 1E2.0 MGy + LOCA Qualified0.6/1 kV Screened Control

74C068 SH C K1 SE NA Nuclear K1 Class 1E Control CableRCC-E K1 / Class 1E LOCA-qualified in-containment nuclear safety control cable

74C068 SH C K1 SE NA Nuclear K1 Class 1E Control Cable (600/1000 V) qualified per RCC-E K1, IEEE 323/383 and IEC 60780-323 for 60-year EPR/PWR reactor containment service, 2.0 MGy gamma radiation, +170 °C/5.5 bar LOCA steam/boric-acid.

RCC-E K1 / IEEE 323
IEEE 383 / IEC 60332-3
SE Tinned Cu Braid
LOCA Steam & Boric Spray
Order designation
74C068 SH C K1 SE NA 7×1.5
Outer Ø ≈
14.4 mm
Weight ≈
325 kg/km
Conductor DC R
12.20 Ω/km
Min. bend radius
115 mm
All sizes (6)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Qualification
RCC-E K1 / 1E
IEEE 323 / IEC 60780-323
Voltage rating
600/1000 V
4,000 V AC test voltage
Radiation dose
≥ 2.0 MGy
200 Mrad cumulative (normal+LOCA)
Design life
60 years @ 55 °C
Arrhenius thermal aging qualified
LOCA peak
+170 °C / 5.5 ba
Superheated steam + H₃BO₃/NaOH
Conductor
1.5 to 6.0 mm²
Tinned copper Class 2/5

Typical values for this cable type, based on RCC-E K1 / IEEE 323 / IEEE 383 / IEC 60780-323 — confirmed in the datasheet and quotation for your order.

Application fit

Is 74C068 SH C K1 SE NA right for your machine?

Qualified for safety-related Class 1E (K1) actuator, solenoid valve, limit-switch and motor-operated valve (MOV) control circuits inside the primary reactor containment building.

Fixed installation

Suitable

Installed inside PWR, EPR, AP1000, VVER and BWR reactor containment trays, penetrations and safety galleries.

Switchgear & control cabinet wiring

Suitable

Connects safety actuation cabinets to containment isolation valves, pressurizer heaters and ECCS pumps.

Immersion & wet locations

Suitable

Survives post-LOCA submergence and 30-day alkaline boric-acid/sodium-hydroxide chemical spray.

Energy chain / drag chain

Not suitable

Fixed nuclear containment safety control cable; not for continuous industrial drag chains.

Use PUR-HF Drag-Chain Cable
Typical machinesPWR / EPR / AP1000 Reactor ContainmentEmergency Core Cooling System (ECCS)Containment Isolation Valve ActuatorsSmall Modular Reactors (SMR) Class 1ESpent Fuel Pool & Radwaste Safety Loops

Construction

Layer by layer

74C068 SH C K1 SE NA showing tinned copper conductors, radiation-cross-linked EPDM/EPR K1 primary insulation, halogen-free inner bedding, overall tinned copper wire braid screen (SE), and zero-halogen K1 cross-linked elastomer outer sheath.

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Tinned annealed copper conductorsClass 2 stranded or Class 5 flexible tinned copper per IEC 60228 (1.5, 2.5, 4.0, 6.0 mm²)Prevents copper-catalysed oxidative degradation during thermal aging
2Radiation-resistant K1 EPDM/EPR insulationHigh-density radiation-cross-linked Ethylene Propylene Diene (EPDM/EPR) nuclear grade compound, numbered Black coresRetains > 10⁶ Ω·km IR during +170 °C LOCA steam peak
3Halogen-free inner bedding & binderRadiation-stable halogen-free elastomeric inner filling and polyester/mica separator tapeMaintains circular geometry for containment penetration seals
4Overall tinned copper braid screen (SE)≥ 85 % optical coverage tinned copper wire braid screen ('SE' = Sous Écran / Overall Screen)Low transfer impedance ZT ≤ 50 mΩ/m @ 30 MHz
5SH Zero-Halogen K1 Cross-Linked Outer SheathNuclear-grade Sans Halogène (SH) cross-linked polyolefin/elastomer outer jacket (Black or Blue)Non-Armé (NA) unarmoured for containment trays & conduits

74C068 SH C K1 SE NA (1.5 mm²)

2 to 37 cores × 1.5 mm² overall braided Class 1E control cable for valve limits and solenoids

74C068 SH C K1 SE NA (2.5–6.0 mm²)

2 to 19 cores × 2.5 / 4.0 / 6.0 mm² Class 1E control & feeder cable for actuators and heaters

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on RCC-E K1 / IEEE 323 / IEEE 383 / IEC 60780-323. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage (Uo/U)
600 / 1000 V AC (0.6/1 kV)
Max. DC resistance @ 20 °C
12.2 Ω/km (1.5) · 7.56 Ω/km (2.5) · 4.70 Ω/km (4.0) · 3.11 Ω/km (6.0)
AC dielectric test
4,000 V rms for 5 min (routine) · 80 V/mil post-LOCA
Insulation resistance
≥ 1,500 MΩ·km @ 20 °C · ≥ 1.0 MΩ·km during LOCA peak

Thermal

Continuous operating temp.
-25 °C to +90 °C (60-year qualified life @ +55 °C)
LOCA / HELB accident peak
+170 °C to +210 °C superheated steam @ 5.5 bar abs
Short-circuit temperature
+250 °C (5 s)

Mechanical

Min. bend radius
8 × OD (fixed) · 12 × OD (during pulling)
Seismic qualification
IEEE 344 / IEC 60980 OBE & SSE 6g triaxial response
Max. pulling tension
50 N / mm² of total copper cross-section

Resistance

Gamma radiation resistance
≥ 2.0 MGy (200 Mrad): 0.6 MGy aging + 1.4 MGy LOCA
LOCA chemical spray
H₃BO₃ (3,000 ppm B) + NaOH / Na₂S₂O₃ spray pH 9.5–10.5
Flame & halogen-free (SH)
IEEE 383 / IEC 60332-3-24 Cat C, IEC 60754-2 & IEC 61034-2

Reference standards

Nuclear qualification std
RCC-E (K1) · IEEE Std 323 · IEEE Std 383 · IEC 60780-323
Quality assurance
10 CFR 50 Appendix B / ASME NQA-1 / ISO 19443
RoHS & REACH
2011/65/EU & EC 1907/2006 compliant

Identification

Code breakdown
SH=Halogen-Free · C=Control · K1=In-Containment · SE=Overall Screen · NA=Unarmoured
Core identification
Black cores with White printed numbers (1, 2, 3...)
Customs tariff (HS)
8544.4993

Sizes

6 standard 74C068 SH C K1 SE NA (0.6/1 kV) control configurations

Dimensional, weight and resistance parameters for RCC-E K1 Class 1E screened control cables.

Dimensions & electrical ratings
Order designationCores × cross-sectionOuter Ø ≈
mm		Weight ≈
kg/km		Max. DC R
Ω/km		Min. bend R
mm		Enquiry
RCC-E K1 / Class 1E Screened Control Cables (0.6/1 kV)
74C068 SH C K1 SE NA 2×1.52 × 1.5 mm² Screened10.616512.2085
74C068 SH C K1 SE NA 4×1.54 × 1.5 mm² Screened12.222512.2098
74C068 SH C K1 SE NA 7×1.57 × 1.5 mm² Screened14.432512.20115
74C068 SH C K1 SE NA 12×1.512 × 1.5 mm² Screened18.652012.20149
74C068 SH C K1 SE NA 4×2.54 × 2.5 mm² Screened13.82957.56110
74C068 SH C K1 SE NA 7×2.57 × 2.5 mm² Screened16.44357.56131
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Supplied with full RCC-E / IEEE 323 batch traceability and ISO 19443 / NQA-1 certificate of conformance.

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
100 % 4.0 kV AC dielectric, IR & conductor resistance testZero breakdown for 5 min and IR ≥ 1,500 MΩ·km @ 20 °CEvery manufactured drum length
Sample tests
Sequential 60-year thermal aging + 2.0 MGy gamma + LOCA steam testPasses 80 V/mil mandrel bend voltage test after full DBA/LOCA profileK1 Type Qualification
IEEE 383 / IEC 60332-3-24 vertical tray flame testSelf-extinguishing with zero halogen acid gas (< 5 mg/g)K1 Type Qualification

Inspection certificate

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

Product approvals

RCC-E K1 & IEC 60780-323IEEE Std 323 & IEEE Std 383ISO 19443 / ASME NQA-1 QA

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX 74C068 SH C K1 SE NA 0.6/1kV RCC-E K1 CLASS 1E
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

PDF74C068 SH C K1 SE NA Nuclear K1 Class 1E Control Cable – technical datasheet6 sizes · construction, technical data, approvalsXLSX74C068 SH C K1 SE NA 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.

What does the designation '74C068 SH C K1 SE NA' stand for in French/European RCC-E nuclear standards?
'74C068' is the nuclear specification family; 'SH' = Sans Halogène (halogen-free LSZH); 'C' = Contrôle (0.6/1 kV control cable); 'K1' = qualified for installation inside the reactor containment building subject to LOCA/HELB accidents; 'SE' = Sous Écran (overall tinned-copper braid screen); and 'NA' = Non-Armé (unarmoured).
What is the difference between K1, K2 and K3 nuclear cable qualification categories?
Under RCC-E and IEC 60780-323, K1 cables are installed inside the reactor containment and must survive 60 years of thermal/radiation aging PLUS a Design Basis Accident (LOCA steam at +170/+210 °C, 5.5 bar, boric acid spray, and 2.0 MGy total radiation). K2 cables are inside containment but only required during normal operation, while K3 cables are installed outside containment.
When should we specify 74C068 SH M K1 EG NA or SH MT K1 NA instead of SH C K1 SE NA?
Use SH C K1 SE NA (600/1000 V) for digital control, solenoids and valve actuators. For low-level 4–20 mA analogue transmitters and RTDs, specify 74C068 SH M K1 EG NA (Measuring, twisted pairs with screen). For thermocouple loops, specify 74C068 SH MT K1 NA (Thermocouple extension alloys).
Are full nuclear QA documentation packages supplied?
Yes. Every lot is manufactured under an ISO 19443 / 10 CFR 50 Appendix B quality program with full raw-material compound batch traceability and routine test reports.

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74C068 SH C K1 SE NA Nuclear K1 Class 1E Control Cable

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