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ÖPVC-JZ/OZ-YSY 300/500 V and ÖPVC-JB/OB-YSY 0.6/1 kV: triple-protected PVC cable

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An engineering guide to the YSY construction: PVC inner sheath, oxidation-protected galvanised steel-wire braid and transparent PVC outer sheath — high resistance to transverse crushing and impact, plus a magnetically effective screen.

Reeling & Trailing Cables for Cranes & Mining — Feichun Special Cable Blogs
ÖPVC-JZ/OZ-YSY and JB/OB-YSY steel-braided control and power cable | FeiChun Cable
FEICHUN CABLE · STEEL-WIRE-BRAIDED CONTROL AND POWER CABLE

ÖPVC-JZ/OZ-YSY 300/500 V and ÖPVC-JB/OB-YSY 0.6/1 kV: triple-protected PVC cable

An engineering guide to the YSY construction: PVC inner sheath, oxidation-protected galvanised steel-wire braid and transparent PVC outer sheath — high resistance to transverse crushing and impact, plus a magnetically effective screen.

Similar to EN 50525-2-51IEC 60228 class 5IEC 60332-1300/500 V · 0.6/1 kVTest voltage 4 kVGalvanised steel braid−30…+80 °C fixedRoHS · CE
Document FC-ART-YSY-2026-23B8Updated: 20 September 2026FeiChun Cable / 飞纯电缆
Engineer’s summary: YSY replaces the copper braid of YCY with galvanised steel wire. You gain mechanical armour and low-frequency magnetic screening; you do not gain high-frequency EMC performance comparable to copper, tensile capacity or burial suitability. Store drums dry.

1. Reading the designation

Y-S-Y = PVC inner sheath, steel-wire braid (S = Stahl), PVC outer sheath. JZ/OZ = numbered black cores, 300/500 V, up to 16 mm²; JB/OB = coloured cores, 0.6/1 kV with 1 kV insulation walls, from 25 mm². J = with GNYE (‘G’), O = without (‘x’).

61

Standard constructions, 2 × 0.5 to 4 G 95 mm².

3×

Protection layers: inner sheath, steel braid, outer sheath.

4 kV

Test voltage.

0.6/1 kV

JB/OB from 25 mm².

2. Construction

The inner sheath is essential here: galvanised steel wires are hard and, without a cushion, would press into the core insulation under load. The transparent outer sheath lets the installer inspect the braid for corrosion or damage.

Cross-section ÖPVC-JZ-YSY 7 G · inner sheath + galvanised steel-wire braidEngineering-drawing style · functional, not to scale · final dimensions per approved order drawingGNYE123456Ø d = 7.2 … 50.4 mm (see tables)1Bare Cu strand, IEC 60228 class 52PVC core insulation, black3White numerals (DIN VDE 0293)4GNYE protective conductor (JZ)5PVC inner sheath6Galvanised steel-wire braid (magnetic + mechanical)7Transparent PVC outer sheathDocumentRevisionProjectionFC-ART-YSY-2026-23B8A · 2026-091st angle
Figure 1: Construction of the 7 G version; callouts match the Pos. column of the materials table.
Materials table (Pos. = callout numbers in Figure 1)
Pos.ElementMaterial / formEngineering function
1ConductorBare Cu, fine-wire, IEC 60228 cl. 5Flexibility for installation and free movement
2Core insulationPVC; 1 kV wall thickness on JB/OB 0.6/1 kV+70 °C continuous, +150 °C short-circuit
3Core identificationJZ/OZ: black with white numerals; JB/OB: coloured (≤5 cores DIN VDE 0293-308)Numbered for control, coloured for power
4Protective conductorGNYE core in ‘G’ versionsOZ/OB versions have none
5Inner sheathPVCProtection layer 1: cushions the cores under the steel braid
6BraidGalvanised steel wire, oxidation-protectedProtection layer 2: transverse crush and impact; magnetically effective screening
7Outer sheathTransparent PVCProtection layer 3; braid visible for inspection

3. Technical data

Technical data (complete)
ParameterValueEngineering note
Conductor materialBare copper strand
Conductor classIEC 60228 class 5
Core insulationPVC1 kV wall thickness on the 0.6/1 kV type
Core identificationJZ/OZ: DIN VDE 0293 black cores with white numerals; JB/OB: coloured — up to 5 cores DIN VDE 0293-308, from 6 cores colour code per technical guideline; G: with GNYE
StrandingCores stranded in layers
Inner sheathPVC
BraidGalvanised steel wire braidOxidation-protected; magnetic screen and mechanical armour
Outer sheathPVC
Sheath colourTransparent
Rated voltage U0/UJZ/OZ: 300/500 V · JB/OB: 0.6/1 kV (from 25 mm²)
Test voltage4 kV
Conductor resistanceAcc. to IEC 60228 cl. 5
Insulation resistanceMin. 20 MΩ × km
Current carrying capacityAcc. to DIN VDE (technical guideline)
Min. bending radius fixed6 × d
Min. bending radius moved15 × d
Operating temp. fixed−30 °C / +80 °CNote −30 °C, not −40 °C as on YCY types
Operating temp. moved−15 °C / +70 °C
Conductor temperature+70 °C operation; +150 °C short-circuit
Burning behaviourSelf-extinguishing and flame-retardant acc. to IEC 60332-1
Chemical resistanceLargely resistant to acids, bases and specified oils
StorageNot outdoors or in wet roomsProtects the galvanised braid until installation
StandardSimilar to EN 50525-2-51; 0.6/1 kV type with 1 kV insulation thickness
ComplianceRoHS; 2014/35/EU Low Voltage Directive (CE); LABS-/silicone-free during production

4. Steel braid versus copper braid

Screening behaviour by braid material
PropertyGalvanised steel braid (YSY)Tinned copper braid (YCY)
Magnetic permeabilityHigh (ferromagnetic)≈1 (non-magnetic)
Low-frequency magnetic fields (50 Hz, transformers, busbars)Effective attenuationLimited
High-frequency electric interference (VSD switching)Moderate — higher resistanceVery effective
Mechanical protectionHigh (hard wires)Moderate
Suitability as PENoNo (use GNYE core)
CorrosionGalvanised; keep dry in storageTinned
Bond the steel braid to earth at the gland for safety. Where both magnetic and high-frequency screening are needed, specify a combined design on request.

5. Full dimension and weight tables

All 61 constructions are listed, grouped by cross-section: JZ/OZ-YSY 300/500 V up to 16 mm², JB/OB-YSY 0.6/1 kV from 25 mm². Bending radii are calculated from the nominal outer diameter (6 × d fixed, 15 × d moved). The steel braid explains why weight is well above that of the copper-braided types.

Cross-section 0.5 mm² · 300/500 V · ÖPVC-JZ/OZ-YSY · 7 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
2 x 0.5OZ (without GNYE)10011087.29.677.043108
3 G 0.5JZ (with GNYE)10008017.714.486.046116
4 G 0.5JZ (with GNYE)10023198.119.2101.049122
5 G 0.5JZ (with GNYE)10017178.624.0116.052129
7 G 0.5JZ (with GNYE)10008319.733.6134.058146
12 G 0.5JZ (with GNYE)100077011.658.0204.070174
21 G 0.5JZ (with GNYE)100078214.9101.0332.089224
Cross-section 0.75 mm² · 300/500 V · ÖPVC-JZ/OZ-YSY · 9 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
2 x 0.75OZ (without GNYE)10011097.814.488.047117
3 G 0.75JZ (with GNYE)10008028.121.6102.049122
4 G 0.75JZ (with GNYE)10008098.628.8135.052129
5 G 0.75JZ (with GNYE)10008229.436.0144.056141
7 G 0.75JZ (with GNYE)100083210.350.4168.062154
12 G 0.75JZ (with GNYE)100077112.886.4252.077192
18 G 0.75JZ (with GNYE)100077814.8130.0330.089222
21 G 0.75JZ (with GNYE)100342016.2151.0415.097243
25 G 0.75JZ (with GNYE)100078617.0180.0435.0102255
Cross-section 1 mm² · 300/500 V · ÖPVC-JZ/OZ-YSY · 9 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
2 x 1OZ (without GNYE)10011108.219.2101.049123
3 G 1JZ (with GNYE)10008038.528.8112.051128
4 G 1JZ (with GNYE)10008109.338.4127.056140
5 G 1JZ (with GNYE)10008239.848.0153.059147
7 G 1JZ (with GNYE)100083311.067.2188.066165
12 G 1JZ (with GNYE)100077213.6115.0285.082204
18 G 1JZ (with GNYE)100077915.6173.0400.094234
25 G 1JZ (with GNYE)100078718.1240.0520.0109272
34 G 1JZ (with GNYE)100079720.5326.0707.0123308
Cross-section 1.5 mm² · 300/500 V · ÖPVC-JZ/OZ-YSY · 10 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
2 x 1.5OZ (without GNYE)10011118.928.8117.053134
3 G 1.5JZ (with GNYE)10008049.343.2137.056140
4 G 1.5JZ (with GNYE)10008119.958.0167.059148
5 G 1.5JZ (with GNYE)100082410.872.0193.065162
7 G 1.5JZ (with GNYE)100083411.9101.0228.071178
8 G 1.5JZ (with GNYE)100084013.6115.0285.082204
12 G 1.5JZ (with GNYE)100077315.1173.0378.091226
18 G 1.5JZ (with GNYE)100078017.3259.0480.0104260
25 G 1.5JZ (with GNYE)100078820.3360.0685.0122304
34 G 1.5JZ (with GNYE)100079822.9490.0870.0137344
Cross-section 2.5 mm² · 300/500 V · ÖPVC-JZ/OZ-YSY · 8 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
2 x 2.5OZ (without GNYE)100111210.448.0157.062156
3 G 2.5JZ (with GNYE)100080511.072.0191.066165
4 G 2.5JZ (with GNYE)100081411.996.0224.071178
5 G 2.5JZ (with GNYE)100082712.8120.0275.077192
7 G 2.5JZ (with GNYE)100083714.3168.0329.086214
12 G 2.5JZ (with GNYE)100077418.2288.0532.0109273
18 G 2.5JZ (with GNYE)100078121.1432.0790.0127316
25 G 2.5JZ (with GNYE)100079024.4600.01,030.0146366
Cross-section 4 mm² · 300/500 V · ÖPVC-JZ/OZ-YSY · 3 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
4 G 4JZ (with GNYE)100081713.9154.0318.083208
5 G 4JZ (with GNYE)100082815.0192.0392.090225
7 G 4JZ (with GNYE)100083816.4269.0486.098246
Cross-section 6 mm² · 300/500 V · ÖPVC-JZ/OZ-YSY · 3 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
4 G 6JZ (with GNYE)100081815.8230.0440.095237
5 G 6JZ (with GNYE)100082917.2288.0545.0103258
7 G 6JZ (with GNYE)100083918.9403.0668.0113284
Cross-section 10 mm² · 300/500 V · ÖPVC-JZ/OZ-YSY · 3 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
4 G 10JZ (with GNYE)100081219.4384.0699.0116291
5 G 10JZ (with GNYE)100082521.5480.0850.0129322
7 G 10JZ (with GNYE)100083523.4672.01,189.0140351
Cross-section 16 mm² · 300/500 V · ÖPVC-JZ/OZ-YSY · 2 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
4 G 16JZ (with GNYE)100081322.4614.01,228.0134336
5 G 16JZ (with GNYE)100082624.6768.01,322.0148369
Cross-section 25 mm² · 0.6/1 kV · ÖPVC-JB/OB-YSY · 2 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
4 G 25JB (with GNYE)100043528.9960.02,020.0173434
5 G 25JB (with GNYE)100044431.81,200.02,465.0191477
Cross-section 35 mm² · 0.6/1 kV · ÖPVC-JB/OB-YSY · 2 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
4 G 35JB (with GNYE)100043732.21,344.02,570.0193483
5 G 35JB (with GNYE)100341636.01,680.03,185.0216540
Cross-section 50 mm² · 0.6/1 kV · ÖPVC-JB/OB-YSY · 1 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
4 G 50JB (with GNYE)100043838.21,920.03,515.0229573
Cross-section 70 mm² · 0.6/1 kV · ÖPVC-JB/OB-YSY · 1 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
4 G 70JB (with GNYE)100043943.82,688.04,810.0263657
Cross-section 95 mm² · 0.6/1 kV · ÖPVC-JB/OB-YSY · 1 constructions
Dimension n × mm²VersionReference item no.Outer Ø mmCu index kg/kmWeight kg/kmMin. bend radius fixed (6 × d) mmMin. bend radius moved (15 × d) mm
4 G 95JB (with GNYE)100044050.43,648.06,360.0302756

6. Application envelope

Power, control and connecting cable in electrical facilities, for fixed laying and flexible applications with free movement, without tensile stress and without forced guidance. Suitable for dry, humid and wet rooms. Outdoor use only with UV protection; not for burial. Do not store outdoors or in wet rooms.

Application envelope of ÖPVC-JZ/OZ ✔ Rough industrial routes Transverse crush and impact protection ✔ Near magnetic fields Free movement ≥ 15 × d, no tension ✘ Not designed for • Drag chains / forced guidance• Tensile load, reels, festoons• Direct burial• Outdoors without UV protection• Storage outdoors / wet rooms Steel braid is not a tensile member:use chain or reeling designs instead. Suitable for dry, humid and wet rooms. Suitable for dry, humid and wet rooms in service; do not store drums outdoors or in wet rooms.
Figure 2: Permitted duties and exclusions.

7. Comparison

YSY compared with related cables
TypeBraid / armourSheathMechanical protectionScreening strengthTypical use
ÖPVC-JZ/OZNoneSingle PVCLowNoneGeneral wiring
ÖPVC-JZ/OZ-YCYTinned Cu braid ≈85 %PVC inner + outerMediumHigh-frequency EMC (electric/HF fields)Drives, signals
ÖPVC-JZ/OZ-YSY / JB/OB-YSYGalvanised steel-wire braidPVC inner + transparent outerHigh (triple protection)Low-frequency magnetic fieldsRough routes, near transformers and busbars
SWA armoured (e.g. NYRY)Steel wire armourPVCHigh, fixed onlyLimitedFixed power, some burial

8. Design calculations

Current rating: DIN VDE base value × f(ambient) × f(grouping) × f(loaded cores) Short-circuit (PVC 70 → 150 °C, Cu): I_k ≈ 115 × S / √t e.g. 4 G 95, t = 0.5 s → ≈ 15.5 kA Voltage drop: ΔU = √3 × I × L × (R cosφ + X sinφ) Bending: fixed R ≥ 6 × d · moved R ≥ 15 × d e.g. 4 G 95 (d = 50.4 mm): 302 mm / 756 mm Support spacing: allow for the higher mass, e.g. 4 G 95 = 6 360 kg/km ≈ 6.4 kg/m

9. Certification and traceability

This cable is RoHS-conform, CE-conform to the 2014/35/EU Low Voltage Directive and LABS-/silicone-free during production, with flame behaviour to IEC 60332-1. FeiChun Cable holds a complete export certification portfolio — including CE, UKCA, VDE, EAC, ATEX and IECEx — and every certificate supplied is checked against the exact type, voltage, factory and standard of the order.

Routine tests

Conductor resistance, 4 kV voltage test, insulation resistance, braid continuity, dimensions and marking.

Type tests

IEC 60332-1 flame, sheath ageing, braid zinc coating check, oil resistance on request.

Delivery documents

Approved datasheet, test report per drum, batch number and length marking; drums supplied with sealed ends.

10. FAQ

Is YSY an EMC cable like YCY?

Different purpose. Copper braid (YCY) is effective against high-frequency electric interference; the steel braid of YSY is ferromagnetic and attenuates low-frequency magnetic fields, while also acting as mechanical armour. For drive EMC, YCY remains the reference.

What does ‘triple protection’ mean?

PVC inner sheath, galvanised steel-wire braid and PVC outer sheath: three layers against transverse crushing and impact.

Can the steel braid be used as the PE conductor?

No. Steel has a much higher resistance than copper. Use the GNYE core as PE and bond the braid to earth for safety.

Can it take tensile load?

No. The braid is armour against crushing, not a strain member; free movement only, without tension.

Why no outdoor storage?

Moisture ingress at cut ends can corrode the braid before installation; keep drums covered and ends sealed.

JZ/OZ or JB/OB?

JZ/OZ (300/500 V, numbered cores) up to 16 mm²; JB/OB (0.6/1 kV, coloured cores) from 25 mm².

FeiChun Cable / 飞纯电缆
Technical and project enquiries: [email protected]
Manufacturing in China, export support
+86 13855123218
FEICHUN CABLE

Triple protection and magnetic screening in one flexible PVC cable

For industrial plant, machinery and routes with high mechanical stress.

[email protected]

+86 13855123218

Document FC-ART-YSY-2026-23B8. Final values are governed by the approved datasheet, order drawing, batch test reports and certificate scope.

Technical Department
on20/09/2026
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