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Product

power connection cable seriesCEI 20-13 RG7H1OR 3-Core+105 °C G7 HEPR Insulation8.7/15 kV · 12/20 kV · 18/30 kV

RG7H1OR Three-Core HEPR-Insulated MV CableCEI 20-13 +105 °C G7 HEPR three-core individually screened MV power cable

RG7H1OR Three-Core HEPR-Insulated Medium-Voltage Cable (6/10 kV, 8.7/15 kV, 12/20 kV & 18/30 kV; 3×25 mm² to 3×300 mm²) manufactured to Italian standard CEI 20-13 and IEC 60502-2—assembling three Class 2 compacted red copper cores.

CEI 20-13 / IEC 60502-2
+105 °C Continuous G7 HEPR
Balanced 3-Core Low EMF
Tray, Duct & Direct Burial
Order designation
RG7H1OR 3×50/16 12/20kV
Conductors / screen
3 × 50 mm² Cl.2 Cu + H16 screen
Outer Ø ≈
52.0 mm
Weight ≈
3,340 kg/km
Ampacity (air 30°C)
218 A
All sizes (6)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Standards
CEI 20-13 / IEC
Three-core screened MV cable
Voltage classes
8.7/15 to 18/30
Also 3.6/6 kV & 6/10 kV
Cross-sections
3 × 25 to 300 mm
Class 2 compacted red Cu ('R')
Insulation
G7 HEPR (+105 °C
High-modulus EPR (+250 °C SC)
Phase screens
3 × H1 Copper Sc
Radial field on each phase core
Outer sheath
Red PVC Type Rz
CEI 20-22 II Cat A flame

Typical values for this cable type, based on CEI 20-13 / IEC 60502-2 / CEI UNEL 35375 — confirmed in the datasheet and quotation for your order.

Application fit

Is RG7H1OR right for your machine?

Combines three individually copper-screened RG7H1 medium-voltage phase cores into a single circular three-core cable ('O'), eliminating trefoil cleats and cutting three-phase pulling time in industrial trays and ducts by 65 %.

Fixed installation

Suitable

Installed as a single three-phase feeder on industrial ladder racks, inside underground conduit runs or buried in trenches without.

Switchgear & control cabinet wiring

Suitable

Symmetric three-core twisted lay cancels external magnetic fields and eliminates circulating eddy currents in adjacent steelwork.

Immersion & wet locations

Suitable

+105 °C G7 HEPR insulation resists moisture ingress and thermal aging in warm petrochemical, steel and paper plant pipe racks.

Drilling jumbo & rotary mast feed

With conditions

Unarmoured PVC sheath; where rocky direct burial or severe impact requires steel armour, specify RG7H1OZR.

Use Armoured RG7H1OZR
Typical machinesIndustrial 15 kV & 20 kV Ring Main Units (RMU)Petrochemical, Refinery & Chemical Process Pipe RacksMedium-Voltage Compressors, Pumps & Chiller FeedersCogeneration, Biomass & Solar Plant MV FeedersHospital, Airport & University Campus MV Rings

Construction

Layer by layer

RG7H1OR Three-Core MV Cable showing three Class 2 compacted circular red copper conductors ('R'), extruded inner semiconducting screens, +105 °C high-modulus G7 HEPR insulation, cold-strippable outer semiconducting layers, individual H1 copper tape/wire screens on each core, non-hygroscopic interstice fillers ('O'), and an overall Red flame-retardant PVC ('R', Rz) outer sheath.

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Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
13 × Class 2 compacted circular red copper conductors ('R')Stranded compacted annealed plain copper per CEI EN 60228 Class 2 (3 × 25 mm² to 3 × 300 mm²)Carries balanced 3-phase MV power in a single circular cable pull
2Triple-extruded inner & cold-strippable outer semicon screensThermoset semiconducting conductor screen and easy-peel outer insulation screen on each phase coreEnsures radial electric field symmetry inside each phase core
3+105 °C G7 High-Modulus HEPR dielectric insulationHard-grade Ethylene Propylene Rubber compound Type G7 per CEI 20-11 (+105 °C continuous, +250 °C short-circuit)+15 °C higher thermal reserve than 90 °C XLPE MV cables
43 × Individual H1 copper tape/wire screens + fillers ('O')Helically lapped annealed red copper tape or concentric wires on each phase core (total screen ≥ 16–25 mm²), laid up with fillers ('O')Confines phase-to-earth fault currents and bonds cleanly at 3-core breakout boots
5Overall Red flame-retardant PVC outer sheath ('R', Type Rz)Flame-retardant polyvinyl chloride compound Type Rz per CEI 20-11 in Red (RAL 3000)Passes CEI 20-22 II Cat A bunched vertical flame propagation test

RG7H1OR 8.7/15 kV (3×25 to 3×240 mm²)

8.7/15 kV (Umax 17.5 kV, 3.6 mm G7 wall) three-core screened MV cable for 15 kV industrial distribution and RMU loops

RG7H1OR 12/20 kV (3×35 to 3×300 mm²)

12/20 kV (Umax 24 kV, 4.5 mm G7 wall) three-core screened MV cable for 20 kV plant substations and large MV motors

RG7H1OR 18/30 kV (3×50 to 3×240 mm²)

18/30 kV (Umax 36 kV, 6.5 mm G7 wall) three-core screened MV cable for 30/33 kV industrial and renewable feeders

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on CEI 20-13 / IEC 60502-2 / CEI UNEL 35375. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage tiers (Uo/U)
6/10 kV · 8.7/15 kV · 12/20 kV · 18/30 kV (Umax up to 36 kV)
Routine AC test voltage
21 kV (6/10) · 30.5 kV (8.7/15) · 42 kV (12/20) · 63 kV (18/30) for 5 min
Partial discharge limit
≤ 5 pC at 1.73 × Uo on every individual phase core
Max. DC resistance @ 20 °C
0.524 Ω/km (35) · 0.387 Ω/km (50) · 0.193 Ω/km (95) · 0.124 Ω/km (150)

Thermal

Continuous conductor temp.
+105 °C continuous operation (G7 HEPR)
Emergency overload temp.
+140 °C
Short-circuit temperature
+250 °C (max. 5 s)

Mechanical

G7 HEPR wall thickness
3.6 mm (8.7/15 kV) · 4.5 mm (12/20 kV) · 6.5 mm (18/30 kV)
Min. bend radius
12 × overall cable OD (fixed installation)
Short-circuit electrodynamic
Self-contained 3-core lay resists phase-to-phase short-circuit forces

Resistance

Bunched flame propagation
CEI 20-22 II & IEC 60332-3-22 Cat A vertical tray fire test
Reduced halogen emission
CEI 20-37 / EN 60754-1: ≤ 18 % HCl (Rz PVC compound)
Water & environmental
Suitable for indoor trays, outdoor pipe racks, ducts & buried trenches

Reference standards

Italian & IEC standards
CEI 20-13 · CEI UNEL 35375 · IEC 60502-2
Ampacity tables
CEI UNEL 35027 (+105 °C three-core MV tables)
RoHS, REACH & CE
2011/65/EU RoHS 2, REACH & CE compliant

Identification

CEI code breakdown
R=Cu · G7=HEPR 105°C · H1=Cu screen · O=3-core · R=Red PVC Rz sheath
Phase identification
Numbered/coloured tapes under each H1 copper screen (1, 2, 3)
Customs tariff (HS)
8544.6010

Sizes

6 standard RG7H1OR 12/20 kV (CEI 20-13) Three-Core MV configurations

Conductor cross-section, overall outer diameter, weight, DC resistance and CEI UNEL 35027 ampacity.

12/20 kV 3-core dimensions & ampacity
CEI designationConductors & screenOuter Ø ≈
mm		Weight ≈
kg/km		Air 30°C
A		Buried 20°C
A		Enquiry
12/20 kV RG7H1OR Three-Core Screened MV Cables
RG7H1OR 3×25/16 12/20kV3 × 25 mm² Cl.2 Cu + H16 screen46.52,450152146
RG7H1OR 3×35/16 12/20kV3 × 35 mm² Cl.2 Cu + H16 screen49.22,860182172
RG7H1OR 3×50/16 12/20kV3 × 50 mm² Cl.2 Cu + H16 screen52.03,340218204
RG7H1OR 3×70/16 12/20kV3 × 70 mm² Cl.2 Cu + H16 screen56.24,120268246
RG7H1OR 3×95/16 12/20kV3 × 95 mm² Cl.2 Cu + H16 screen60.55,060324292
RG7H1OR 3×150/16 12/20kV3 × 150 mm² Cl.2 Cu + H16 screen67.26,850420368
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Also available in 6/10 kV, 8.7/15 kV and 18/30 kV voltage classes up to 3×240 / 3×300 mm².

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 % 3.5 × Uo AC voltage test (42 kV on 12/20 kV) & 3-phase PD testZero breakdown for 5 min and PD ≤ 5 pC at 1.73 × Uo on all 3 coresEvery manufactured drum
Sample tests
CEI 20-22 II Cat A bunched vertical flame propagation testSelf-extinguishes within 2.5 m char limit under Cat A fuel loadPer production batch
G7 HEPR high-modulus hot-set, 125/170 kV BIL impulse & thermal cyclingMeets CEI 20-13 / IEC 60502-2 dielectric and mechanical limitsType qualification

Inspection certificate

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

Product approvals

CEI 20-13 & IEC 60502-2CEI 20-22 II Cat A FlameRoHS 2, REACH & CE

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX RG7H1OR 12/20kV CEI 20-13 CEI 20-22 II
Delivery form
Fumigated wooden drums or steel export reels
Standard lengths
500 m · 1000 m (or custom cut lengths)
MOQ
100 m (standard) · 500 m (custom)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFRG7H1OR Three-Core HEPR-Insulated MV Cable – technical datasheet6 sizes · construction, technical data, approvalsXLSXRG7H1OR 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.

When should we choose three-core RG7H1OR instead of three single-core RG7H1R cables?
For cross-sections from 25 mm² to 150 mm² (typically MV ring main loops, transformer feeders up to 5 MVA, and 6–15 kV industrial motor drives), three-core RG7H1OR allows a single pull on cable trays, requires no trefoil short-circuit cleats, and eliminates single-core sheath circulating currents. Above 185–240 mm², three single-core RG7H1R cables are preferred for lighter drum weights and smaller bend radii.
What does the letter 'O' signify in RG7H1OR?
In the Italian CEI 20-27 designation system, when individually screened cores ('RG7H1') are laid up together into a circular three-core assembly under a common outer sheath ('R'), the letter 'O' denotes the round multi-core assembly with fillers.
Are all three phase cores individually screened with copper ('H1') inside RG7H1OR?
Yes. Each of the three G7 HEPR-insulated cores has its own extruded inner semiconducting layer, cold-strippable outer semiconducting layer, and helically applied H1 copper screen, ensuring a purely radial electric field in every phase.
What if our trench or pipe rack requires galvanized steel armour over this 3-core MV cable?
Specify RG7H1OZR, which adds galvanized steel wire or double steel tape armour ('Z') over the three-core RG7H1O assembly.

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RG7H1OR Three-Core HEPR-Insulated MV Cable

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