3+1 Core Flame Retardant 4 Cores Cable For Factory Three Phase Main Power
Product Summary
Product Details
Three Phase 4 Cores Cable
,4 Cores Cable 1.5mm sheath
,10 sq mm copper cable 4 core
Product Description
ZR-YJV 3+1 Core Flame Retardant Copper Cable 3x16mm²+1x10mm² for Factory Three-Phase Main Power
Cable Designation & Meaning
|
Code |
Meaning |
|---|---|
|
ZR |
Legacy prefix for flame retardant; under GB/T 19666-2019 it defaults to Class C (modern equivalent: ZC). |
|
YJ |
XLPE (cross-linked polyethylene) insulation |
|
V |
PVC outer sheath — flame-retardant grade, contains halogen (Cl) |
|
0.6/1 kV |
Rated voltage U₀/U = 600/1000 V; Uₘ = 1.2 kV |
|
3×16+1×10 mm² |
Three phase cores of 16 mm² copper + one reduced neutral core of 10 mm² copper |
ZR-YJV 3×16+1×10 mm² — Cable Specification & Engineering Data
1. Overview & Ratings. ZR-YJV 3×16+1×10 — flame-retarding 3+1-core cable, three 16 mm² Cu phase conductors + one 10 mm² Cu neutral conductor, XLPE insulation, one ST2 PVC sheath, rated 0.6/1 kV (Um = 1.2 kV), 50 Hz; built and proof-tested per GB/T 12706.1 / IEC 60502-1, stranding per GB/T 3956, ZC fire class per GB/T 19666. ≈ 17.5 mm, ≈ 679 kg/km, 100 m coils/drums.
2. Construction Stack. Conductor → outer sheath:
| Layer | Build | Wall | Diameter |
|---|---|---|---|
| Conductor — phase (×3) | Annealed Cu, Class 2, 7 × 1.70 mm (1+6) each | — | ≈ 5.10 mm |
| Conductor — neutral (×1) | Annealed Cu, Class 2, 7 × 1.35 mm (1+6) | — | ≈ 4.05 mm |
| Insulation — phase (×3) | XLPE | 0.7 mm | ≈ 6.50 mm |
| Insulation — neutral (×1) | XLPE | 0.7 mm | ≈ 5.45 mm |
| Lay-up | Neutral core at centre + 3 phase cores around + filler + binder tape | — | ≈ 14.5 mm (calc.) |
| Sheath | Flame-retarded PVC, ST2, black | 1.5 mm | ≈ 17.5 mm (Zhongce 3+1) |
3. Electrical Ratings. R ≤ 1.15 Ω/km (phase) / 1.83 Ω/km (neutral) @ 20 °C; routine 3.5 kV / 5 min; insulation resistance ≥ 36.7 MΩ·km; XLPE volume resistivity ≥ 1×10¹² Ω·cm; capacitance ≤ 0.45 μF/km. Reference ampacity (3 phase cores loaded) ≈ 90 A air @ 30 °C / 110 A buried @ 25 °C — Zhongce 3+1 unarmored table.
|
Parameter |
Value |
Note |
|---|---|---|
|
Rated voltage U₀/U |
0.6 / 1 kV |
Uₘ = 1.2 kV |
|
Test voltage AC (5 min) |
3.5 kV |
Routine |
|
Type-test voltage |
4.0 kV |
IEC 60502-1 |
|
DC resistance @20 °C (phase, per core) |
≤ 1.15 Ω/km |
GB/T 3956 max, 16 mm² |
|
DC resistance @20 °C (neutral, per core) |
≤ 1.83 Ω/km |
GB/T 3956 max, 10 mm² |
|
AC resistance @90 °C (est., phase) |
≈ 1.50 Ω/km |
per core |
|
AC resistance @90 °C (est., neutral) |
≈ 2.38 Ω/km |
per core |
|
Current rating in air (30 °C, single circuit, 3-core+1) |
≈ 65–75 A |
based on 16 mm² phase |
|
Current rating in air (design) |
≈ 70 A |
apply grouping + ambient correction |
|
Direct buried (20–25 °C, soil 1.0–1.2 K·m/W, 0.7 m) |
≈ 75–88 A |
common catalogue 78–84 A |
|
Design buried rating |
≈ 80 A |
soil thermal resistivity correction required |
|
Short-circuit current (1 s, Cu, 250 °C, phase) |
≈ 1.6 kA |
16 mm² reference |
|
Short-circuit current (1 s, Cu, 250 °C, neutral) |
≈ 1.0 kA |
10 mm² reference |
|
Frequency |
50/60 Hz AC |
— |
4.Cable Parameters & Test Parameters
| ZR-YJV 3×16+1×10 mm² — Test / Verification Parameters (per GB/T 12706.1 & IEC 60502-1) | ||||
| Stage | Test Item | Method / Standard | Acceptance Criterion | Notes |
| Routine | Conductor DC resistance — phase | GB/T 3956 (IEC 60228) | ≤ 1.15 Ω/km @ 20 °C (16 mm²) | Every production length |
| Routine | Conductor DC resistance — neutral | GB/T 3956 (IEC 60228) | ≤ 1.83 Ω/km @ 20 °C (10 mm²) | Every production length |
| Routine | Power-frequency withstand voltage | GB/T 12706.1 / IEC 60502-1 | 3.5 kV AC / 5 min, no breakdown | Conductor-to-earth/water |
| Routine | Construction check | GB/T 2951 | Phase ins. ≥ 0.7 mm; neutral ins. ≥ 0.7 mm; sheath ≥ 1.5 mm; OD within tolerance | Thickness & diameter |
| Sample | Hot set test — XLPE | GB/T 12706.1 §16.3.13 / GB/T 2951.11 | 200 ± 3 °C, 15 min, 0.2 MPa: load elongation ≤ 175 %; permanent ≤ 15 % | Cross-linking degree |
| Sample | Conductor construction & diameter | GB/T 3956 | Phase: 7 × 1.70 mm Ø ≈ 5.10; neutral: 7 × 1.35 mm Ø ≈ 4.05 | Per batch |
| Type | Single-cable flame test | GB/T 18380.12 | No flame spread to top reference | ZR property |
| Type | Bunched flame test — class C | GB/T 18380.35 | Char ≤ 2.5 m; 20 min; ≥ 1.5 L/m | ZC class |
| Type | Bending test | GB/T 12706.1 | No damage on specified mandrel | Multi-core rule |
| Post-install | DC withstand test | Q/GDW 13244.1-2018 | 2.4 kV DC / 15 min, no breakdown | New installations |
| Optional | Insulation resistance @ 20 °C | Factory method | ≥ 36.7 MΩ·km | Not routine in GB/T 12706.1 |
5.Cable Cross Section Structure
| ZR-YJV 3×16+1×10 mm² — Cable Cross-Section Structure (Schematic) | |||||
| 3+1 core construction (3 phase + 1 neutral) from conductor to outer sheath · nominal values per GB/T 12706.1 / IEC 60502-1 · not to exact scale | |||||
| No. | Layer | Material / Construction | Nominal Thickness (mm) | Diameter (mm) | Function / Remarks |
| 1 | Conductor — phase (Cu) × 3 | Annealed copper, Class 2 stranded — 7 × 1.70 mm per core (7/1.70, 1+6), nominal 16 mm² per core | — | ≈ 5.10 (Ø per phase core) | Current-carrying phase conductors; max DC resistance ≤ 1.15 Ω/km @ 20 °C |
| 2 | Conductor — neutral (Cu) × 1 | Annealed copper, Class 2 stranded — 7 × 1.35 mm (7/1.35, 1+6), nominal 10 mm² | — | ≈ 4.05 (Ø neutral core) | Neutral / return conductor; max DC resistance ≤ 1.83 Ω/km @ 20 °C |
| 3 | Insulation — phase (XLPE) × 3 | Cross-linked polyethylene | 0.7 | ≈ 6.50 (Ø per phase core, over insulation) | Dielectric barrier; rated 90 °C continuous; withstands 3.5 kV / 5 min |
| 4 | Insulation — neutral (XLPE) × 1 | Cross-linked polyethylene | 0.7 | ≈ 5.45 (Ø neutral core, over insulation) | Dielectric barrier for neutral core |
| 5 | Core lay-up | Neutral core at centre + three phase cores around it + dry filler + binder tape | — | ≈ 14.5 (Ø over lay-up, calc.) | 3+1 configuration; round bundle |
| 6 | Outer sheath (PVC) | Flame-retardant PVC, ST2 type, black | 1.5 | ≈ 17.5 (Ø overall, Zhongce) | Mechanical & moisture protection; flame retardance ZC (ZR) per GB/T 19666 |
| Key Dimensions & Properties | |||||
| Overall diameter | ≈ 17.5 | mm | Zhongce 3+1 unarmored table | ||
| Approx. cable weight | ≈ 679 | kg/km | Zhongce 679 (Cu) | ||
| Rated voltage | 0.6/1 | kV | AC 50 Hz; max system voltage Um = 1.2 kV | ||
| Max conductor temperature | 90 / 250 | °C | Continuous / short-circuit (≤ 5 s) | ||
| Min. bending radius (multi-core) | ≥ 15 × OD | — | OD = actual cable diameter | ||
| Flame-retardant class | ZC (ZR) | — | GB/T 19666 | ||
| Schematic — not to exact scale. Nominal values for reference; confirm against factory test certificate. | |||||
6. Thermal & Fire. 90 °C continuous, 250 °C short-circuit (≤ 5 s); −20~+45 °C ambient, ≥ 0 °C laying; ZC per GB/T 19666 — GB/T 18380.12 single-burn + GB/T 18380.35 class-C bunched (char ≤ 2.5 m); PVC is halogen-bearing → WDZ-YJY for LSZH.
| Flame-Retardant (FR) Characteristics — ZR-YJV 3×16+1×10 mm² | ||
| ZR-YJV 3×16+1×10 mm² (3 (L1+L2+L3, 16 mm²) + 1 (N, 10 mm²); 3+1 = L1+L2+L3+N) · 0.6/1 kV | ||
| 1. Cable Identification | ||
| Code / Item | Meaning / Value | Standard / Note |
| Designation | ZR-YJV 3×16+1×10 mm² | GB/T 12706.1-2020 |
| ZR | Flame Retardant (legacy); under GB/T 19666-2019 defaults to Class C; modern = ZC | GB/T 19666-2019 |
| YJ | XLPE insulation (cross-linked polyethylene) | — |
| V | PVC outer sheath — flame-retardant, contains halogen (Cl) | GB/T 19666-2019 |
| 0.6/1 kV | U₀/U = 600/1000 V; Uₘ = 1.2 kV | IEC 60502-1 |
| 3×16+1×10 mm² | Three 16 mm² phase cores + one 10 mm² neutral core (reduced neutral, 3+1 construction) | — |
| Construction | Unarmoured, non-screened, round multi-core (3+1) | — |
| Application note | 3+1 core → three-phase AC with neutral (L1+L2+L3+N); neutral reduced to 10 mm². No separate PE (use 4-core or 5-core if PE required). | — |
| 2. Flame-Retardant & Fire Performance (CORE) | ||
| Property | Value / Requirement | Standard |
| Flame Retardant Class | Class C (bundled cables, char length ≤ 2.5 m) | GB/T 19666-2019; GB/T 18380.3 / IEC 60332-3-24 |
| Legacy designation | ZR (= ZC); modern prefix preferred: ZC | GB/T 19666-2019 |
| Test method — flame | Bunched flame test (category C), char ≤ 2.5 m after flame removal | GB/T 18380.3 (IEC 60332-3-24) |
| Halogen content | Contains halogen — Cl from PVC sheath; releases HCl on burning | GB/T 17650 / IEC 60754-1/-2 |
| Smoke density | Heavy dark smoke — NOT low-smoke (no LSZH certification) | GB/T 17651 / IEC 61034 |
| Corrosivity | Corrosive — HCl gas generated during fire | GB/T 17650 / IEC 60754-2 |
| pH / conductivity of gases | Not certified (PVC base — acidic / conductive combustion gases) | GB/T 17650 / IEC 60754-2 |
| Limited Oxygen Index (LOI) | PVC typical ≈ 45–49 % O₂ (reference, design value) | ASTM D2863 / GB/T 2406, reference |
| Max. conductor operating temp. | 90 °C (long-term service) | GB/T 12706.1-2020 |
| Max. short-circuit temp. (≤5 s) | 250 °C | IEC 60502-1 |
| Emergency overload temp. | 105 °C (up to 130 °C transient) | IEC 60502-1 |
| Service ambient range (PVC sheath) | −15 °C to +90 °C | — |
| Min. installation ambient temp. | 0 °C (pre-heat required below 0 °C) | — |
| 3. Fire Test Summary | ||
| Test | Requirement | ZR-YJV 3×16+1×10 mm² Verdict |
| Bunched flame test (Class C) | Char length ≤ 2.5 m | PASS (design, Class C) |
| Single flame test (IEC 60332-1) | Self-extinguishing | PASS (XLPE/PVC FR) |
| Smoke density (IEC 61034) | Light transmittance ≥ 60 % for LSZH | N/A (PVC = heavy smoke) |
| Halogen content (IEC 60754) | ≤ 0.5 % HCl for LSZH | N/A (contains Cl) |
| Acidity / corrosivity (IEC 60754-2) | pH ≥ 4.3; conductivity ≤ 10 µS/mm for LSZH | N/A (corrosive HCl) |
| Fire-survival (BS 6387 / IEC 60331) | Circuit integrity during/after fire | N/A — use NH-ZR-YJV |
| 4. Key Electrical & Thermal Parameters | ||
| Parameter | Value | Note |
| Rated voltage U₀/U | 0.6 / 1 kV | Uₘ = 1.2 kV |
| Test voltage AC (5 min, routine) | 3.5 kV | IEC 60502-1 |
| Type-test voltage | 4.0 kV | IEC 60502-1 |
| DC resistance @ 20 °C (phase, 16 mm²) | ≤ 1.15 Ω/km | GB/T 3956 / IEC 60228, Class 2 max |
| DC resistance @ 20 °C (neutral, 6 mm²) | ≤ 1.83 Ω/km | GB/T 3956 / IEC 60228, Class 2 max |
| AC resistance @ 90 °C (phase, est.) | ≈ 1.50 Ω/km | per phase core |
| Current rating — in air (30 °C, single circuit) | ≈ 62–68 A (design ≈ 65 A) | 3+1 core |
| Current rating — direct buried (20 °C, soil 1.0 K·m/W, 0.7 m) | ≈ 75–82 A (design ≈ 78 A) | 3+1 core |
| Short-circuit current (1 s, Cu, 250 °C, per core) | ≈ 1.6 kA (per phase core) | phase core; neutral ≈ 1.0 kA |
| 5. Construction & Material Specification (with FR Contribution) | ||
| Layer (inside → out) | Description / Specification | FR Contribution |
| Conductor (phase ×3) | Bare annealed copper, Class 2 stranded, 7×Ø1.70 mm, Ø ≈ 5.2 mm | None (Cu non-combustible) |
| Conductor (neutral ×1) | Bare annealed copper, Class 2 stranded, 7×Ø1.35 mm, Ø ≈ 4.3 mm | None (Cu non-combustible) |
| Conductor screen | Omitted (not required for 0.6/1 kV) | — |
| Insulation (×4) | XLPE (cross-linked polyethylene), 0.7 mm nominal; L1/L2/L3 = brown/black/grey, N = blue (all 0.7 mm class) | XLPE — low flame spread |
| Filler | Flame-retardant PP / PE to form round assembly | FR additive |
| Binder | Flame-retardant tape over laid-up cores | FR barrier |
| Inner binder / assembly | FR tape, no inner sheath required for plain YJV | FR barrier |
| Outer sheath | Flame-retardant PVC (ZR grade), 1.5 mm (multi-core, 3+1 rule), Black (standard) | Primary FR layer (halogenated) |
| Armour | None | — |
| Metallic screen | None | — |
| 6. Dimensional Data | ||
| Item | Typical Value | Remarks |
| Conductor nominal area | 3×16 mm² + 1×10 mm² | phase / neutral |
| Number of cores | 4 (3+1) | — |
| Conductor construction | Phase: Class 2, 7×Ø1.70 mm; Neutral: Class 2, 7×Ø1.70 mm | min. 7 wires |
| Conductor diameter (approx.) | Phase ≈ 5.2 mm; Neutral ≈ 4.3 mm | — |
| Insulation thickness | 0.7 mm (both 16 & 10 mm² class) | 0.7 mm class |
| Diameter over insulated core | Phase 6.6 mm; Neutral 5.7 mm | conductor + 2×0.7 |
| Sheath thickness | 1.5 mm (multi-core, 3+1 rule) | 3+1 multi-core rule |
| Overall cable diameter | 13.0 – 16.0 mm (design ≈ 17.0 mm) | design ≈ 17.0 mm |
| Approx. weight | 360 – 480 kg/km (use ≈ 420 kg/km) | — |
| Cable shape | Round | — |
| 7. Mechanical & Installation Parameters | ||
| Parameter | Value | Note |
| Minimum bending radius (unarmoured multi-core) | ≥ 15 × OD ≈ 255 mm @ Ø≈ 17.0 mm | — |
| Max. pulling tension (Cu only) | 50 N/mm² × (3×16 + 1×10) = 2,900 N total | use conductor sock, avoid sheath grip |
| Direct burial | Allowed in non-aggressive soil; for mechanical protection use ZR-YJV22 3×16+1×10 | — |
| Conduit ID | ≥ 1.5 × OD → ≥ 26 mm (use 32 mm or 40 mm conduit) | — |
| Fixing (horizontal / vertical tray) | ≈ 800 mm / ≈ 1500 mm (horizontal / vertical tray) | — |
| Elevation difference limit | None (XLPE) | — |
| 8. Selection Guide — When FR Matters | ||
| Scenario | Recommended Cable | Reason |
| Flame-retardant, halogenated acceptable (standard) | ZR-YJV 3×16+1×10 mm² (this cable) | Class C FR, PVC sheath, cost-effective |
| Low-smoke halogen-free required (LSZH) | WDZ-YJY 3×16+1×10 | LSZH sheath — IEC 61034 / IEC 60754 compliant |
| Fire-survival circuit (circuit integrity) | NH-ZR-YJV / WDZN-YJY 3×16+1×10 | BS 6387 / IEC 60331 fire-survival grade |
| 1. ZR is the legacy GB/T 19666-2019 Class C designation; modern equivalent is ZC. Class C: char ≤ 2.5 m after bunched flame test (GB/T 18380.3). | ||
| 2. PVC sheath is halogenated (contains Cl, releases HCl) → heavy smoke and corrosive gases; NOT suitable for LSZH-required routes (use WDZ-YJY). | ||
| 3. 3×16+1×10 mm² = three 16 mm² phase cores (L1+L2+L3) + one 10 mm² neutral (N), total 4 cores (3+1); neutral is reduced in size. Current ratings (≈65 A air / ≈78 A buried) are design values; apply grouping, ambient temperature, soil thermal resistivity and IEC 60364-5-52 correction factors. | ||
| 4. For LSZH → WDZ-YJY 3×16+1×10; for fire-survival → NH-ZR-YJV / WDZN-YJY 3×16+1×10; for armour → ZR-YJV22 3×16+1×10; for separate PE → use 5-core (e.g. 5×10). | ||
| 5. DC resistance phase ≤ 1.15 Ω/km, neutral ≤ 1.83 Ω/km (GB/T 3956 Class 2 max). Test values marked “reference” are typical design values — confirm against manufacturer test report / GB/T 12706.1-2020. | ||
7. Installation & Care. Bend ≥ 15 × OD; DC site test 4U0 = 2.4 kV / 15 min before energising (Q/GDW 13244.1-2018); pre-heat drums below 0 °C; de-rate 90/110 A for ambient, grouping, burial; lugs/glands for the 5.10 mm phase core, 4.05 mm neutral core and 17.5 mm sheath.
8. Application. Three-phase four-wire distribution, building mains and light-to-medium industrial feeders where a dedicated neutral conductor is required in one cable (TN-C style) — conduit, tray, trench, duct, trunking; indoor or sheltered outdoor.
9. Ordering. ZR-YJV 0.6/1 kV 3×16+1×10 + length/drum + marking; confirm against factory test certificate.
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