1 / 5

Product

power connection cable seriesCEI 20-13 RG7H1OZR3-Core Screened + SWA Armoured6/10 kV to 18/30 kV G7 HEPR

RG7H1OZR Three-Core Screened Armoured MV CableCEI 20-13 6/10–18/30 kV +105 °C G7 HEPR 3-core screened & SWA armoured MV cable

RG7H1OZR Three-Core Screened Armoured Medium-Voltage Cable (6/10 kV, 8.7/15 kV, 12/20 kV & 18/30 kV; 3×25 mm² to 3×240 mm²) manufactured to Italian standard CEI 20-13 and IEC 60502-2—combining three Class 2 compacted red copper.

CEI 20-13 / IEC 60502-2
H1 Cu Screen + Z Steel Armour
+105 °C G7 HEPR & Cat A
Direct Burial & ATEX Zones
Order designation
RG7H1OZR 3×50/16 12/20kV
Conductors / armour
3×50 mm² + H16 + 2.5 mm SWA
Outer Ø ≈
60.2 mm
Weight ≈
5,580 kg/km
Ampacity (air 30°C)
215 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
Screened & armoured 3-core MV
Voltage classes
6/10 to 18/30 kV
6/10, 8.7/15, 12/20, 18/30 kV
Cross-sections
3 × 25 to 240 mm
Class 2 compacted red Cu ('R')
Insulation
G7 HEPR (+105 °C
High-modulus EPR (+250 °C SC)
Screen + Armour
3×H1 Cu + Z SWA
Radial field + steel wire armour
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 — confirmed in the datasheet and quotation for your order.

Application fit

Is RG7H1OZR right for your machine?

The heavy-duty armoured member of the Italian CEI 20-13 medium-voltage family—combining radial copper screening on each phase ('H1') with galvanized round steel wire armour ('Z') for hazardous-area petrochemical plants, rocky trenches and vertical mine shafts.

Fixed installation

Suitable

Installed directly in rocky underground trenches without concrete ducting, on exposed refinery pipe racks, and down vertical.

Drilling jumbo & rotary mast feed

Suitable

Galvanized round steel wire armour ('Z') resists excavator impact, ground subsidence, rodent attack and high axial pulling forces.

TBM gantry & advancing tunnel reel

Suitable

Passes CEI 20-22 II (IEC 60332-3-22 Cat A) vertical bunched flame testing for dense industrial multi-tier cable racks.

Motorised monospiral reel

Not suitable

Steel-wire-armoured fixed MV distribution cable; not for reeling drums.

Use Flexible (N)TMCGC11Y
Typical machinesOil Refineries, LNG Terminals & Offshore TopsidesDirect-Buried 15 kV / 20 kV / 30 kV Utility & Solar FeedersUnderground Mine Shafts, Tunnel Galleries & QuarriesHeavy Steelworks, Rolling Mills & Chemical ComplexesHigh-Power MV Compressors, Pumps & Crusher Drives

Construction

Layer by layer

RG7H1OZR Three-Core Screened Armoured MV Cable showing three Class 2 compacted red copper conductors ('R'), triple-extruded inner semicon, +105 °C G7 HEPR insulation and cold-strippable outer semicon, individual H1 copper screens on each core, extruded inner PVC bedding ('O'), concentric galvanized round steel wire armour ('Z'), and overall Red flame-retardant PVC ('R', Rz) outer sheath.

123456
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 × 240 mm²)Three-phase MV power transmission in a single armoured assembly
2Triple-extruded inner & cold-strippable outer semicon screensThermoset semiconducting conductor screen and easy-peel outer insulation screen on each phase coreEliminates internal air voids and partial discharge up to 18/30 kV
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)Compact reduced-wall dielectric with superior water-tree immunity
43 × Individual H1 copper screens + inner PVC bedding ('O')Helically applied red copper tape/wire screen on each phase core (total ≥ 16 mm²) + extruded PVC inner bedding over laid-up coresSeparates copper phase screens from galvanized steel wire armour
5Galvanized round steel wire armour ('Z' = Filo d'acciaio)Concentric helical layer of hot-dip galvanized round steel wires (1.6 mm to 2.5 mm diameter)Heavy mechanical crush, impact, rodent and axial tensile protection
6Overall Red flame-retardant PVC outer sheath ('R', Type Rz)Lead-free flame-retardant PVC compound Type Rz per CEI 20-11 in Red (RAL 3000)Passes CEI 20-22 II Cat A bunched flame test and resists oil/soil chemicals

RG7H1OZR 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 & SWA armoured MV cable for 15 kV refineries and rocky burial

RG7H1OZR 12/20 kV (3×35 to 3×240 mm²)

12/20 kV (Umax 24 kV, 4.5 mm G7 wall) three-core screened & SWA armoured MV cable for 20 kV industrial & mining networks

RG7H1OZR 18/30 kV (3×50 to 3×185 mm²)

18/30 kV (Umax 36 kV, 6.5 mm G7 wall) three-core screened & SWA armoured MV cable for 30/33 kV heavy infrastructure

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on CEI 20-13 / IEC 60502-2. 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 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 + Armour
4.5 mm G7 wall (12/20 kV) + 2.0/2.5 mm galvanized round steel wires
Min. bend radius
15 × overall cable OD (during pulling) · 12 × OD (fixed)
Vertical shaft support
Round steel wire armour supports vertical drop weights in mine shafts

Resistance

Bunched flame propagation
CEI 20-22 II & IEC 60332-3-22 Cat A vertical tray fire test
Crush & rodent barrier
Steel wire armour ('Z') provides full mechanical & rodent protection
ATEX & direct burial
Approved for direct soil burial and ATEX Zone 1/2 pipe racks

Reference standards

Italian & IEC standards
CEI 20-13 · CEI UNEL 35027 · IEC 60502-2
Armour wire standard
EN 10257-1 hot-dip galvanized round steel wire
RoHS, REACH & CE
2011/65/EU RoHS 2, REACH & CE compliant

Identification

CEI code breakdown
R=Cu · G7=HEPR · H1=Cu screen · O=3-core · Z=Steel wire armour · R=PVC
Outer sheath colour
Red (RAL 3000)
Customs tariff (HS)
8544.6010

Sizes

6 standard RG7H1OZR 12/20 kV (CEI 20-13) Screened & Armoured MV configurations

Conductor cross-section, SWA wire size, overall outer diameter, weight and CEI UNEL 35027 ampacity.

12/20 kV 3-core SWA dimensions & ampacity
CEI designationConductors, screen & SWAOuter Ø ≈
mm		Weight ≈
kg/km		Air 30°C
A		Buried 20°C
A		Enquiry
12/20 kV RG7H1OZR Three-Core Screened & Steel-Armoured MV
RG7H1OZR 3×25/16 12/20kV3×25 mm² + H16 + 2.0 mm SWA53.54,120150145
RG7H1OZR 3×35/16 12/20kV3×35 mm² + H16 + 2.0 mm SWA56.24,650180170
RG7H1OZR 3×50/16 12/20kV3×50 mm² + H16 + 2.5 mm SWA60.25,580215202
RG7H1OZR 3×70/16 12/20kV3×70 mm² + H16 + 2.5 mm SWA64.56,540264244
RG7H1OZR 3×95/16 12/20kV3×95 mm² + H16 + 2.5 mm SWA68.87,680320288
RG7H1OZR 3×150/16 12/20kV3×150 mm² + H16 + 2.5 mm SWA75.89,750414364
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Because the magnetic fields of all three phases cancel inside the 3-core assembly, ferromagnetic galvanized steel wire armour ('Z') can be used without eddy-current heating.

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) & PD test (< 5 pC)Zero breakdown for 5 min and partial discharge ≤ 5 pC at 1.73 × UoEvery manufactured drum
Sample tests
Steel wire armour tensile strength, zinc mass & inner bedding thicknessMeets CEI 20-13 / EN 10257-1 mechanical and corrosion specificationsPer production batch
CEI 20-22 II Cat A bunched flame, G7 hot-set & 125 kV BIL impulse testPasses Cat A vertical tray fire and lightning impulse withstandType 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 FlameATEX EN 60079-14 Compatible

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX RG7H1OZR 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

PDFRG7H1OZR Three-Core Screened Armoured MV Cable – technical datasheet6 sizes · construction, technical data, approvalsXLSXRG7H1OZR 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.

Why can three-core RG7H1OZR use galvanized steel wire armour ('Z'), whereas single-core MV cables cannot use magnetic steel armour?
In a three-core cable like RG7H1OZR, the instantaneous vector sum of the three balanced phase currents (I₁ + I₂ + I₃) inside the armour ring is zero, so no alternating magnetic flux induces hysteresis or eddy-current heating in the steel wires. On a single-core AC cable, steel wire armour would act as a shorted transformer turn and overheat unless non-magnetic aluminum wire armour is used.
Why does RG7H1OZR have both individual H1 copper screens AND outer Z steel wire armour?
They serve two separate engineering functions: the individual H1 copper screens immediately over each phase core's outer semiconducting layer confine the 12/20 kV electric field radially and carry phase-to-earth capacitive/fault currents, while the outer galvanized steel wire armour ('Z') over the inner bedding ('O') provides mechanical crush, impact and tensile protection.
What is the difference between 'Z' (round steel wire) and 'N' (double steel tape) armour in CEI designations?
'Z' designates galvanized round steel wire armour (SWA), which provides both radial crush protection and high axial tensile strength for long pulls and vertical shafts. 'N' designates helically wound double steel tape armour (STA), which resists radial crush in horizontal trenches but cannot take high pulling tension.
How is RG7H1OZR terminated inside a 15 kV or 20 kV switchgear cell?
The outer PVC sheath and steel wire armour ('Z') are glanded and earthed at the switchgear entry plate; above the gland, a 3-core heat-shrink or cold-shrink breakout boot seals the crutch, and the three individually copper-screened RG7H1 cores are terminated exactly like single-core RG7H1R cables.

Request a quote

Get an engineering quote for RG7H1OZR

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

RG7H1OZR Three-Core Screened Armoured MV 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

Unarmoured 3-core MV

RG7H1OR

CEI 20-13 8.7/15–18/30 kV three-core G7 HEPR screened MV cable

View productSingle-core HEPR MV

RG7H1R

CEI 20-13 8.7/15–18/30 kV single-core G7 HEPR screened MV cable

View productArmoured 3-core LV

RG7OZR

CEI 20-13/14 0.6/1 kV & 1.8/3 kV three-core G7 HEPR armoured cable

View productJIS MV shipboard

SPYC / TPYC MV

JIS C 3410 3.3 kV & 6.6 kV EPR-insulated braided marine MV cable

View product
DatasheetRequest a quote