Building Power Distribution 2 Core Power Cable Braided Flex Oxygen Free Copper
Building Power Distribution 2 Core Power Cable Braided Flex Oxygen Free Copper
Product Summary
ZR-YJV 2*10mm² Flame Retardant 2 Core Power Cable,0.6/1kV Oxygen-Free Copper,XLPE Insulation PVC Sheath for Building Power Distribution Code Mean:ZR-Flame Retardant,YJ-XLPE Insulation,V-PVC Outer Sheathed. ZR-YJV 2×10 mm² — Technical Description 1. Product Class. The ZR-YJV 2×10 is a two-core flame...
Product Details
Highlight:
Power Distribution 2 core power cable
,2 core power cable Oxygen Free
,Copper 2 core braided flex
Conductor (×2):
Bare Annealed Copper, Class 2 Stranded, 7×∅1.35 Mm, Conductor Ø ≈ 4.0 Mm
Conductor nominal area (per core):
10 Mm²
Number of cores:
2
Conductor construction:
Class 2, 7×∅1.35 Mm,min. 7 Wires
Conductor diameter (approx.):
4.0mm
Insulation (×2):
XLPE, Colours: Red/black/blue Etc.
Insulation thickness:
0.7 Mm (10/16 Mm² Class)
Diameter over insulated core:
5.4 Mm(4.0 + 2×0.7)
Filler:
Flame-retardant PP/PE To Form Round Assembly
Binder:
Flame-retardant Tape Over Laid-up Cores
Outer sheath:
Flame-retardant PVC (ZR Grade)
Sheath thickness:
1.8 Mm (multi-core Rule, ≥1.8 Mm)
Overall cable diameter:
15.0 – 15.5 Mm
Approx. weight:
280 – 320 Kg/km
Long-term service temp.:
90 °C
Short-circuit temp. (≤5 s):
250 °C
Emergency overload:
105–130 °C
Routine test:
3.5 KV AC / 5 Min; Type Test 4.0 KV
Volume resistivity @90 °C:
≥ 10¹² Ω·cm
Product Description
ZR-YJV 2*10mm² Flame Retardant 2 Core Power Cable,0.6/1kV Oxygen-Free Copper,XLPE Insulation PVC Sheath for Building Power Distribution
Code Mean:ZR-Flame Retardant,YJ-XLPE Insulation,V-PVC Outer Sheathed.
ZR-YJV 2×10 mm² — Technical Description
1. Product Class. The ZR-YJV 2×10 is a two-core flame-retardant power cable — two identical 10 mm² copper cores, XLPE-insulated, PVC-sheathed, rated 0.6/1 kV (Um = 1.2 kV), 50 Hz. Standards: GB/T 12706.1 / IEC 60502-1, conductor GB/T 3956 / IEC 60228, fire rating GB/T 19666 / GB/T 18380 (default ZC).
2. Construction, Core to Jacket. Two parallel sub-assemblies under one jacket:
| Layer | Build | Wall | Diameter |
|---|---|---|---|
| Conductor (×2) | Annealed copper, Class 2, 7 × 1.35 mm (7/1.35) each, 10 mm² per core | — | ≈ 4.05 mm per core |
| Insulation (×2) | Cross-linked polyethylene | 0.7 mm | ≈ 5.45 mm per core (over ins.) |
| Lay-up | Two cores + non-hygroscopic filler, optional binder tape | — | ≈ 10.9 mm |
| Sheath | Flame-retarded PVC, ST2, black | 1.8 mm | ≈ 15.2 mm overall |
Weight ≈ 328 kg/km (324–328; Al version ≈ 190–196).
3. Electrical Data. DC resistance ≤ 1.83 Ω/km per core @ 20 °C; routine 3.5 kV / 5 min; XLPE volume resistivity ≥ 1×10¹² Ω·cm; insulation resistance typically ≥ 36.7 MΩ·km; capacitance ≤ 0.45 μF/km per core. Reference ampacity (both cores loaded) ≈ 70 A in air and ≈ 90 A direct-buried @ 25 °C — per-cable values; derate per GB/T 16895 / IEC 60364.
|
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 |
|
DC resistance @20 °C (Class 2 Cu, per core) |
≤ 1.83 Ω/km |
GB/T 3956 max |
|
AC resistance @90 °C (est.) |
≈ 2.38 Ω/km |
per core |
|
Current rating in air (30 °C, single circuit, 2-core) |
≈ 65 – 72 A |
design ≈ 68 A |
|
Direct buried (20 °C, soil 1.0 K·m/W, 0.7 m) |
≈ 85 – 95 A |
design ≈ 88 A |
|
Short-circuit current (1 s, Cu, 250 °C, per core) |
≈ 1.00 kA |
reference |
|
Frequency |
50/60 Hz AC (DC usable) |
— |
4. Thermal Limits. Continuous 90 °C; short-circuit 250 °C (≤ 5 s); ambient −20 to +45 °C; laying ≥ 0 °C; minimum bend radius ≥ 15 × OD (multi-core, smaller than the 20 × OD of single cores).
| ZR-YJV 2×10 mm² Flame-Retardant Copper-Conductor XLPE-Insulated PVC-Sheathed Power Cable — Product Parameters (0.6/1 kV, Two-Core) | |||||
| Construction: CU / XLPE / PVC, 2 cores • Standards: GB/T 12706.1, IEC 60502-1 (cable), GB/T 3956 (conductor), GB/T 19666 & GB/T 18380 (flame retardance) • Nominal values for reference — confirm against factory test certificate | |||||
| No. | Category | Parameter | Value | Unit | Notes / Standard Reference |
| A. Product Identification | |||||
| 1 | Identification | Product name | Flame-retardant copper-conductor XLPE-insulated PVC-sheathed power cable (two-core) | — | Designation ZR-YJV; "ZR" = flame-retardant (halogen-containing) |
| 2 | Identification | Model designation | ZR-YJV 2×10 | — | 2 cores × 10 mm²; Cu / XLPE / PVC |
| 3 | Identification | Design standards | GB/T 12706.1; IEC 60502-1 | — | Conductor: GB/T 3956 / IEC 60228; flame retardance: GB/T 19666, GB/T 18380; safety: CCC / production licence |
| 4 | Identification | Rated voltage U0/U | 0.6/1 | kV | Max system voltage Um = 1.2 kV |
| 5 | Identification | Rated frequency | 50 | Hz | AC power distribution |
| 6 | Identification | Number of cores | 2 | — | Two-core cable, both cores live (phase + neutral / L + N applications) |
| 7 | Identification | Nominal cross-sectional area | 10 | mm² | Per core; nominal cross-section per GB/T 3956 |
| B. Cable Construction (from conductor to outer sheath) | |||||
| 8 | Conductor | Material | Plain annealed copper (Cu) | — | High-conductivity electrolytic / oxygen-free copper |
| 9 | Conductor | Conductor class | Class 1 or Class 2 (typical: Class 2, stranded) | — | GB/T 3956 / IEC 60228 |
| 10 | Conductor | Typical stranding construction (per core) | 7 wires × 1.35 mm (7/1.35) | — | Class 2 round stranded; nominal section 10 mm² per core |
| 11 | Conductor | Conductor diameter (per core) | ≈ 4.05 | mm | Ø of the 7/1.35 stranded core (GB/T 3956 nominal) |
| 12 | Conductor | Max. DC resistance of conductor at 20 °C | 1.83 | Ω/km | GB/T 3956, Class 2 copper; acceptance criterion for 10 mm² |
| 13 | Insulation | Material | Cross-linked polyethylene (XLPE) | — | Thermally cross-linked; natural/transparent colour |
| 14 | Insulation | Nominal insulation thickness | 0.7 | mm | GB/T 12706.1 / IEC 60502-1 (0.6/1 kV, 10 mm²) |
| 15 | Insulation | Diameter over insulation (per core) | ≈ 5.45 | mm | ≈ 4.05 + 2 × 0.7 (calculated) |
| 16 | Lay-up | Core assembly | Two insulated cores laid up with non-hygroscopic filler; optional binder tape | — | Round construction, right-hand lay |
| 17 | Sheath | Material | Flame-retardant polyvinyl chloride (PVC, ST2 type) | — | Colour: black (or as ordered) |
| 18 | Sheath | Nominal sheath thickness | 1.8 | mm | GB/T 12706.1 / IEC 60502-1 (ahtk & Mingda tables agree) |
| 19 | Dimensions | Approx. overall diameter | 15.2 | mm | ≈ 15.2 mm (ahtk 15.2; Mingda 15.3) |
| 20 | Dimensions | Approx. cable weight | ≈ 328 | kg/km | ahtk 328; Mingda 324.2 (aluminium version ≈ 190–196 kg/km) |
| C. Electrical Performance | |||||
| 21 | Electrical | Max. DC conductor resistance at 20 °C | 1.83 | Ω/km | GB/T 3956; routine measurement |
| 22 | Electrical | Power-frequency withstand voltage (routine test) | 3.5 kV / 5 min, no breakdown | — | AC 50 Hz; per GB/T 12706.1 / IEC 60502-1 |
| 23 | Electrical | Insulation resistance (finished cable, 20 °C) | ≥ 36.7 | MΩ·km | Typical finished-cable reference for 0.6/1 kV XLPE cables; varies with geometry and manufacturer test method |
| 24 | Electrical | XLPE volume resistivity at 20 °C | ≥ 1 × 10¹² | Ω·cm | Material-level requirement (manufacturer reference) |
| 25 | Electrical | Capacitance (approx., per core) | ≤ 0.45 | μF/km | Manufacturer reference value |
| 26 | Electrical | Reference ampacity — in air, 25 °C, both cores loaded | ≈ 70 | A | Mingda two-core table (70 A Cu); applies to the cable as a whole; derate per GB/T 16895 / IEC 60364 |
| 27 | Electrical | Reference ampacity — direct burial, 25 °C | ≈ 90 | A | Mingda two-core table (90 A Cu); depends on soil thermal resistivity and depth |
| D. Thermal Performance | |||||
| 28 | Thermal | Max. continuous conductor temperature | 90 | °C | XLPE insulation temperature class |
| 29 | Thermal | Max. conductor temperature under short-circuit (≤ 5 s) | 250 | °C | Per GB/T 12706.1 / IEC 60502-1 |
| 30 | Thermal | Ambient service temperature range | -20 to +45 | °C | Per Qifan datasheet family; check project specification |
| 31 | Thermal | Min. installation (laying) temperature | 0 | °C | Pre-heat the cable if ambient is below 0 °C |
| E. Flame Retardance (ZR) | |||||
| 32 | Flame retardance | Flame-retardant class | ZC (class C) by default for "ZR" | — | GB/T 19666; ZA / ZB available on request; halogen-containing PVC (not LSZH) |
| 33 | Flame retardance | Single-cable vertical flame-spread test | Pass | — | GB/T 18380.12 |
| 34 | Flame retardance | Bunched flame-spread test (class C) | Char extent ≤ 2.5 m above burner bottom edge | — | GB/T 18380.35: non-metallic volume ≥ 1.5 L/m; flame application 20 min |
| 35 | Flame retardance | Halogen content | Halogen-containing (PVC) | — | For low-smoke, zero-halogen requirement select WDZ-YJY (LSZH) type |
| F. Installation | |||||
| 36 | Installation | Min. bending radius — multi-core cable | ≥ 15 × OD | — | GB 50168 practice for multi-core XLPE cables (Mingda lists 15 × OD); OD = actual cable diameter |
| 37 | Installation | Laying methods | Conduit, tray, cable trench, duct, building trunking, supported/suspended aerial | — | Also direct burial with mechanical protection where permitted |
| 38 | Installation | Site withstand test after installation | DC 4U0 = 2.4 kV, 15 min (recommended) | — | Per utility procurement standard Q/GDW 13244.1-2018; practice may vary by project |
| G. Packing & Delivery | |||||
| 39 | Packing | Standard delivery length | 100 m per coil/drum (or as ordered) | — | Typical industry practice; custom lengths available |
| 40 | Packing | Cable marking | Model, rated voltage, manufacturer, year of manufacture, sequential length marks | — | Per GB/T 6995 / project specification |
| 41 | Packing | Packing form | Coil (carton drum) / wooden drum / export packing | — | As per customer requirement |
5.Test Parameters
| ZR-YJV 2×10 mm² — Test / Verification Parameters (per GB/T 12706.1 & IEC 60502-1) | ||||
| Test Stage | Test Item | Method / Standard | Requirement / Acceptance Criterion | Notes |
| Routine test | Conductor DC resistance measurement | GB/T 3956 (IEC 60228) | ≤ 1.83 Ω/km at 20 °C (per core) | Measured on every production length |
| Routine test | Power-frequency withstand voltage | GB/T 12706.1 / IEC 60502-1 | 3.5 kV AC, 5 min, no breakdown | Applied between each conductor and earth/water; 50 Hz |
| Routine test | Construction check — insulation & sheath thickness, outer diameter | GB/T 2951 | Within GB/T 12706.1 tolerances | Insulation ≥ 0.7 mm nominal; sheath ≥ 1.8 mm nominal |
| Sample test | Hot set (thermal elongation) test — XLPE insulation | GB/T 12706.1 §16.3.13 / GB/T 2951.11 | 200 ± 3 °C, 15 min, stress 0.2 MPa: elongation under load ≤ 175 %; permanent elongation after cooling ≤ 15 % | Verifies degree of cross-linking |
| Sample test | Conductor construction & diameter check | GB/T 3956 | Class 2; 7 × 1.35 mm; Ø ≈ 4.05 mm | Sampled per batch |
| Type test | Single-cable vertical flame-spread test (flame retardance) | GB/T 18380.12 | No flame spread; charring does not reach top reference point | ZR / ZC flame-retardant property |
| Type test | Bunched flame-spread test, class C | GB/T 18380.35 | Char extent ≤ 2.5 m above burner bottom edge; flame application 20 min; non-metallic volume ≥ 1.5 L/m | Class ZC per GB/T 19666 |
| Type test | Bending test (mechanical) | GB/T 12706.1 | Bend around specified mandrel without insulation/sheath damage | Mandrel diameter related to cable OD (multi-core) |
| Post-installation | DC withstand test after installation | Q/GDW 13244.1-2018 (recommended practice) | 4U0 = 2.4 kV DC, 15 min, no breakdown | For new installations; verify project specification |
| Optional | Insulation resistance measurement at 20 °C | Manufacturer test method | ≥ 36.7 MΩ·km (typical finished-cable value) | Not a routine item in GB/T 12706.1; confirm with factory |
| Optional | XLPE volume resistivity at 20 °C | Manufacturer / material test | ≥ 1 × 10¹² Ω·cm | Material-level reference |
6. Fire Performance. Passes GB/T 18380.12 single burn and class-C bunched burn GB/T 18380.35 (char ≤ 2.5 m) → ZC per GB/T 19666. PVC = halogen-bearing; choose WDZ-YJY for LSZH specs.
| Flame Retardant Data Sheet — ZR-YJV 0.6/1 kV 2x10 mm² | |||
| 1. General Information | |||
| Item | Value | Remarks | |
| Cable type | ZR-YJV 0.6/1 kV 2x10 mm² | Copper conductor, XLPE insulated, flame-retardant PVC sheathed | |
| Rated voltage U₀/U | 0.6 / 1 kV | Uₘ = 1.2 kV | |
| Number of cores | 2 | Single-phase (L+N) or DC (+,-) | |
| Conductor (per core) | Cu, Class 2, 7x⌀1.35 mm | OD ≈ 4.0 mm | |
| Insulation | XLPE, 0.7 mm nom. | 90 °C service | |
| Outer sheath | Flame-retardant PVC, 1.8 mm nom. | Multi-core rule (≥1.8 mm) | |
| Overall OD / Weight | ≈ 15.2 mm / ≈ 300 kg/km | Design values | |
| Flame retardant class | Class C (per GB/T 19666) | ZR default = Class C; modern equiv. ZC | |
| 2. Flame Retardant Classification (GB/T 19666 / IEC 60332-3) | |||
| Level | Designation example | Non-metallic volume (L/m) | Char height limit |
| Class A (highest) | ZA- / WDZA- | ≥ 7.0 | ≤ 2.0 m |
| Class B | ZB- / WDZB- | 3.5 | ≤ 2.5 m |
| Class C (this product) | ZC- / ZR- | 1.5 | ≤ 2.5 m |
| Class D (lowest) | ZD- | 0.5 | ≤ 2.5 m |
| 3. Flame Retardant Test Items & Technical Requirements (Class C) | |||
| No. | Test item / Standard | Class C limit | Result / Note |
| 1 | Bunched flame propagation — GB/T 18380.3 / IEC 60332-3-24, Category C | Char height ≤ 2.5 m above burner; 20 min; self-extinguishing | Pass (required) |
| 2 | Single flame — GB/T 18380.1 / IEC 60332-1-2 | Self-extinguishing, no re-ignition | Pass (required) |
| 3 | Specimen non-metallic volume (bundled test) | 1.5 L/m (Class C) | Pass (required) |
| 4 | Flame duration / after-flame time | After-flame ≤ 1 h (60 min) for C category per GB/T 18380 | Pass (required) |
| 5 | pH value of gas (GB/T 17650.2 / IEC 60754-2) * | Not a mandatory ZR(C) certified limit; PVC ≠ halogen-free | Reference only (see Notes) |
| 6 | Conductivity of aq. extract (GB/T 17650.2) * | ≤ 10 µS/mm (WDZ certified); not mandated for plain ZR | Reference only (see Notes) |
| 7 | Halogen acid gas emission (GB/T 17650.1 / IEC 60754-1) * | HCl content ≤ 0.5 % (WDZ); PVC contains Cl | Reference only (see Notes) |
| 8 | Smoke density — transmittance (GB/T 17651 / IEC 61034) * | ≥ 60 % (WDZ certified); PVC = heavy dark smoke | Reference only (see Notes) |
| 9 | Oxygen index LOI (GB/T 2406 / IEC 4589) | LOI ≥ 32 % typical for flame-retardant PVC | ≥ 32 % |
| 10 | Flame retardant filler / binder (ZR grade) | FR PP/PE filler + FR tape present | Pass (required) |
| 4. Important Notes | |||
| 1. ZR is a legacy designation; under current GB/T 19666-2019 it defaults to Class C. Modern equivalent: ZC. Thus ZR-YJV ≈ ZC-YJV. | |||
| 2. Items marked * (pH, conductivity, halogen acid gas, smoke density) are REFERENCE / NON-CERTIFIED for plain ZR (Class C) because the PVC sheath contains chlorine. They are NOT mandatory acceptance limits for this product. | |||
| 3. For genuine halogen-free + low-smoke, use WDZ-YJY 2x10 (polyolefin sheath). For fire-survival (circuit integrity during fire), use NH-ZR-YJV 2x10 (with mica tape, 830 °C / 90 min). | |||
| 4. Selection logic: Flame retardant only → ZR-YJV (this product, lowest cost); Flame retardant + halogen-free low-smoke → WDZ-YJY; Flame retardant + fire-resistant → NH-ZR-YJV. | |||
| Flame Retardant Grade Comparison — ZR(C) vs WDZ vs WDZA(A) vs NH vs Plain YJV | ||||||
| Property | ZR-YJV (this, C) | WDZ-YJY | WDZA-YJY (A) | NH-ZR-YJV | Plain YJV | Remarks |
| Flame retardant level | Class C | Class C | Class A | Class C | None | A > B > C > D |
| Non-metallic volume (L/m) | 1.5 | 1.5 | ≥ 7.0 | 1.5 | — | Bundled test |
| Halogen-free (W) | No (PVC, Cl) | Yes (PO) | Yes (PO) | No (PVC, Cl) * | No | * NH uses mica + PVC |
| Low smoke (D) | No | Yes (≥ 60 %) | Yes (≥ 60 %) | No | No | Smoke transmittance |
| Flame retardant (Z) | Yes (C) | Yes (C) | Yes (A) | Yes (C) | No | Z =Fire Resistant |
| Fire-survival / circuit integrity | No | No | No | Yes (830 °C, 90 min) | No | NH =Flame Retardant (IEC 60331) |
| Sheath material | FR-PVC | Polyolefin | Polyolefin | FR-PVC + mica | PVC | — |
| pH / corrosivity | Corrosive HCl | ≥ 4.3 / non-corrosive | ≥ 4.3 | Corrosive HCl | Corrosive | WDZ certified only |
| Cost tier | Lowest | Medium | High | Highest | Low | — |
| Typical use | General, cost-sensitive | Metro/hospital/data centre | Critical tunnels | Emergency feeders | No FR req. | — |
| Note: This product (ZR-YJV, Class C) provides flame retardancy only (limits flame spread). It does NOT provide certified halogen-free / low-smoke (that requires WDZ- / polyolefin sheath) nor fire-survival circuit integrity (that requires NH- / mica tape). | ||||||
7.Cross Section Structure
| ZR-YJV 2×10 mm² — Cable Cross-Section Structure (Schematic) | |||||
| Two-core construction 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 (Cu) × 2 | Annealed copper, Class 2 stranded — 7 × 1.35 mm per core (7/1.35), nominal 10 mm² per core | — | ≈ 4.05 (Ø per core) | Current-carrying element; max DC resistance ≤ 1.83 Ω/km @ 20 °C (per core) |
| 2 | Insulation (XLPE) × 2 | Cross-linked polyethylene | 0.7 | ≈ 5.45 (Ø per core, over insulation) | Dielectric barrier; rated 90 °C continuous; withstands 3.5 kV / 5 min |
| 3 | Core lay-up | Two insulated cores laid up with non-hygroscopic filler; optional binder tape | — | ≈ 10.9 (Ø over lay-up) | Forms a round assembly for sheathing |
| 4 | Outer sheath (PVC) | Flame-retardant PVC, ST2 type, black | 1.8 | ≈ 15.2 (Ø overall) | Mechanical & moisture protection; flame retardance ZC (ZR) per GB/T 19666 |
| Key Dimensions & Properties | |||||
| Overall diameter | 15.2 | mm | 15.2–15.3 mm across sources (ahtk 15.2; Mingda 15.3) | ||
| Approx. cable weight | ≈ 328 | kg/km | ahtk 328; Mingda 324.2; Al version ≈ 190–196 kg/km | ||
| 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 | ||
| Product Structure Introduction — ZR-YJV 2×10 mm² (English) | |||
| Two-core layered construction description, from conductor to outer sheath · per GB/T 12706.1 & IEC 60502-1 · CU / XLPE / PVC · 0.6/1 kV | |||
| 1. Scope of This Sheet | |||
| This sheet describes the physical build of ZR-YJV 2×10, a flame-retardant, two-core low-voltage cable rated 0.6/1 kV AC. It follows GB/T 12706.1 / IEC 60502-1 for manufacture and testing, GB/T 3956 / IEC 60228 for the core, and GB/T 19666 for the ZR (default ZC) class. The finished product is roughly 15.2 mm in diameter, weighs about 328 kg/km and is supplied on 100 m coils or drums. | |||
| Both cores are identical live conductors; the cable is intended for fixed wiring rather than trailing service. | |||
| 2. Conductor Sub-Assembly (Per Core) | |||
| Each of the two cores is built from seven annealed copper wires of 1.35 mm (7/1.35) stranded to Class 2, giving 10 mm² per core and a core diameter of ≈ 4.05 mm. The 20 °C DC resistance is limited to 1.83 Ω/km per core. Strancing keeps the core flexible enough for conduit pulling despite the compact size. | |||
| 3. Insulation Sub-Assembly (Per Core) | |||
| A 0.7 mm layer of XLPE is extruded over each core, bringing the diameter over insulation to ≈ 5.45 mm. The cross-linked material allows continuous service at 90 °C and a five-second fault temperature of 250 °C, with volume resistivity ≥ 1×10¹² Ω·cm. Every production length must hold 3.5 kV AC for five minutes without breakdown. | |||
| 4. Core Assembly & Outer Sheath | |||
| The two insulated cores are laid up together with a non-hygroscopic filler (and an optional binder tape) to form a round assembly of ≈ 10.9 mm. A 1.8 mm flame-retardant PVC (ST2) jacket is then extruded over the bundle, closing the cable at ≈ 15.2 mm. The jacket provides the ZC fire rating, verified by GB/T 18380.12 (single burn) and GB/T 18380.35 (class C, char ≤ 2.5 m); PVC is halogen-bearing, so WDZ-YJY remains the zero-halogen option. | |||
| 5. Practical Handling Notes | |||
| • Multi-core bend limit: ≥ 15 × OD. • Run the DC 4U0 = 2.4 kV / 15 min site test before commissioning. • Service ambient −20 to +45 °C; warm coils below 0 °C. • Two-core ampacity is per cable — derate for grouping and tray fill. • Confirm core Ø from the certificate before crimping lugs. |
8. Verification Regime. Routine: DC resistance, 3.5 kV/5 min, dimensional audit (ins. ≥ 0.7 mm, sheath ≥ 1.8 mm). Sample: XLPE hot-set (200 ± 3 °C / 15 min / 0.2 MPa). Type: flame + bending. Site: DC 4U0 = 2.4 kV / 15 min (Q/GDW 13244.1-2018 practice).
9. Handling Precautions. Bend ≥ 15 × OD; unreel without kinking; protect from UV and sharp edges; run the site DC test before energising; both cores are live — do not parallel-load one side only; size lugs to the ≈ 4.05 mm core.
10. Typical Applications. Single-phase lighting and power feeders, L+N circuits, control and instrumentation supplies, small pump and fan circuits, switchboard droppers at 0.6/1 kV — conduits, trays, trunking, trenches; indoor or sheltered outdoor.
11. Ordering Data. ZR-YJV 0.6/1 kV 2×10, length, drum/coil type, marking. Standard 100 m coils/drums; confirm all figures against the factory certificate.
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