AC 600V Unshielded Festoon Cable with Textile Reinforcing Layer, JIS C 3327 Compliant, −40°C to +90°C, Thicker Insulation (1.2–2.7 mm) — Mechanically Reinforced Power and Control Cable for Harsh Port Crane, Ship Unloader, Steel Mill, and Mining Festoon Applications Where Standard 2PNCT Cables Cannot Survive
The Reinforced Power Cable: 3PNCT Construction Adds a Dedicated Textile Reinforcing Layer for Impact, Crush, and Abrasion Protection to the Full Power Cable Range — from 1-Core × 150 mm² High-Current Feeders to 30-Core Multi-Circuit Control Cables — Without the Weight and Cost of a Metallic Shield Braid, Making It the Optimal Choice for Unshielded Power and Discrete Control Circuits in Environments Where Mechanical Abuse Destroys Standard 2PNCT Cables
WALSTOON® WS-FSTN-3PNCT Festoon System Flexible Cable
AC 600V Unshielded Festoon Cable with Textile Reinforcing Layer, JIS C 3327 Compliant, −40°C to +90°C, Thicker Insulation (1.2–2.7 mm) — Mechanically Reinforced Power and Control Cable for Harsh Port Crane, Ship Unloader, Steel Mill, and Mining Festoon Applications Where Standard 2PNCT Cables Cannot Survive
The Reinforced Power Cable: 3PNCT Construction Adds a Dedicated Textile Reinforcing Layer for Impact, Crush, and Abrasion Protection to the Full Power Cable Range — from 1-Core × 150 mm² High-Current Feeders to 30-Core Multi-Circuit Control Cables — Without the Weight and Cost of a Metallic Shield Braid, Making It the Optimal Choice for Unshielded Power and Discrete Control Circuits in Environments Where Mechanical Abuse Destroys Standard 2PNCT Cables
Introduction: Reinforced Power Without the Shield
The WALSTOON® WS-FSTN-3PNCT fills a critical gap in the festoon cable product range: it provides the mechanical reinforcement of 3PNCT construction — the dedicated textile reinforcing layer that protects against impact, crush, and abrasion — without the weight and cost of a metallic shield braid. This makes it the optimal choice for power distribution and discrete control circuits in harsh mechanical environments where EMI shielding is not required but standard 2PNCT cables cannot survive.
The cable covers the full power range: from 1-core × 150 mm² high-current single conductors for trolley drives and hoist motors, through 3-core and 4-core three-phase motor feeders, to 30-core × 2 mm² multi-circuit discrete control cables. The thicker insulation (1.2–2.7 mm, scaling with conductor size — up to 3× the standard 2PNCT thickness) combined with the reinforcing layer gives every configuration substantially greater mechanical robustness than its 2PNCT equivalent.
In the WALSTOON product family, the WS-FSTN-3PNCT is the unshielded companion to the WS-FSTN-3PNCT-SB. Where the 3PNCT-SB adds a shield braid for EMI-sensitive crane control signals, the plain 3PNCT omits the shield to provide a lighter, more flexible, and more cost-effective solution for power and discrete control circuits that simply need better mechanical protection.
Festoon cables on port cranes are safety-critical. The reinforcing layer provides additional mechanical protection but does not substitute for proper festoon system design. For high-current single-conductor cables (50 mm² and above), ensure terminations are rated for full ampacity and torqued to specification.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Designation | WS-FSTN-3PNCT (Festoon, 3PNCT type, Unshielded, Reinforced) |
| Standard | JIS C 3327. Construction per JIS C 3005. |
| Rated Voltage | AC 600V |
| Test Voltage | AC 3,000V / 1 minute |
| Rated Temperature | 90°C |
| Ambient Temperature | −40°C to +90°C |
| Minimum Bending Radius | 6 × OD |
| Shielding | None (unshielded). For shielded reinforced cable, see WS-FSTN-3PNCT-SB. |
| Reinforcing Layer | Textile reinforcement (0.5 mm standard; 1.0 mm for larger configurations). |
| Insulation | 1.2–2.7 mm (scaled with conductor size — thicker than standard 2PNCT). |
| Flame / Oil / Abrasion | JIS C 3005 / JIS C 3005 / JIS C 3327 Table 6.12 |
| Weather | Resistant to ozone, UV, and moisture. |
| Configurations | 1C: 8–150 mm². 2C: 2–100 mm². 3C: 2–100 mm². 4C: 2–60 mm². 5C: 2–5.5 mm². 10–30C: 2–3.5 mm². |
Cable Construction & Reinforcing Layer
| Layer | Material | Function |
|---|---|---|
| Conductor | Annealed copper, Class 5 flexible | Power/signal. 2–150 mm² range. |
| Insulation | Cross-linked elastomer, 90°C | 1.2 mm (≤14 mm²), 1.6 mm (22–38 mm²), 2.1 mm (50–80 mm²), 2.7 mm (125–150 mm²). Up to 3× thicker than 2PNCT. |
| Core Assembly | Cores + fillers | Circular cross-section, mechanical stability. |
| Reinforcing Layer | Textile reinforcement | 3PNCT differentiator. 0.5 mm standard; 1.0 mm for larger cables. Impact/crush/abrasion protection. |
| Outer Sheath | Chloroprene rubber (CR) | Oil/ozone/UV/abrasion/flame. 2.6–5.0 mm scaled to cable size. |
The 3PNCT insulation is significantly thicker than equivalent 2PNCT cables at every conductor size. For example, a 2 mm² conductor has 1.2 mm insulation in the 3PNCT versus 0.8 mm in the 2PNCT — a 50% increase. At 50 mm², the insulation is 2.1 mm versus 1.5 mm — a 40% increase. This thicker insulation provides enhanced dielectric strength, greater mechanical robustness, and better thermal protection — all additive to the reinforcing layer’s protection.
Data — 1-Core (8–150 mm²)
| Size (mm²) | Cond. Ø | Insul. | Reinf. | Sheath | OD (mm) | kg/km | R (Ω/km) | IR (MΩ·km) |
|---|---|---|---|---|---|---|---|---|
| 8 | 3.7 | 1.2 | 0.5 | 2.6 | 12.5 | 215 | 2.45 | 400 |
| 14 | 4.9 | 1.2 | 0.5 | 2.7 | 14.0 | 295 | 1.39 | 400 |
| 22 | 7.0 | 1.6 | 0.5 | 2.9 | 17.0 | 445 | 0.892 | 300 |
| 30 | 8.1 | 1.6 | 0.5 | 3.0 | 18.0 | 540 | 0.661 | 300 |
| 38 | 9.1 | 1.6 | 0.5 | 3.0 | 19.0 | 630 | 0.525 | 300 |
| 50 | 10.4 | 2.1 | 0.5 | 3.2 | 22.0 | 815 | 0.411 | 300 |
| 60 | 11.6 | 2.1 | 0.5 | 3.3 | 23.0 | 955 | 0.329 | 300 |
| 80 | 13.5 | 2.1 | 0.5 | 3.4 | 25.0 | 1,210 | 0.243 | 300 |
| 100 | 15.2 | 2.1 | 0.5 | 3.5 | 27.0 | 1,440 | 0.193 | 200 |
| 125 | 16.8 | 2.7 | 1.0 | 3.6 | 31.0 | 1,810 | 0.156 | 200 |
| 150 | 18.7 | 2.7 | 1.0 | 3.7 | 33.0 | 2,020 | 0.136 | 200 |
Data — 2-Core (2–100 mm²)
| Size (mm²) | Cond. Ø | Insul. | Reinf. | Sheath | OD (mm) | kg/km | R (Ω/km) | IR (MΩ·km) |
|---|---|---|---|---|---|---|---|---|
| 2 | 1.8 | 1.2 | 0.5 | 2.8 | 15.0 | 260 | 10.2 | 500 |
| 3.5 | 2.5 | 1.2 | 0.5 | 2.9 | 17.0 | 340 | 5.54 | 500 |
| 5.5 | 3.1 | 1.2 | 0.5 | 2.9 | 18.0 | 410 | 3.56 | 500 |
| 8 | 3.7 | 1.2 | 0.5 | 3.0 | 19.5 | 500 | 2.52 | 400 |
| 14 | 4.9 | 1.2 | 1.0 | 3.2 | 24.0 | 735 | 1.43 | 400 |
| 22 | 7.0 | 1.6 | 1.0 | 3.6 | 30.0 | 1,180 | 0.919 | 300 |
| 30 | 8.1 | 1.6 | 1.0 | 3.7 | 32.0 | 1,420 | 0.681 | 300 |
| 38 | 9.1 | 1.6 | 1.0 | 3.9 | 34.0 | 1,690 | 0.541 | 300 |
| 50 | 10.4 | 2.1 | 1.0 | 4.2 | 40.0 | 2,230 | 0.423 | 300 |
| 60 | 11.6 | 2.1 | 1.0 | 4.3 | 42.0 | 2,590 | 0.339 | 300 |
| 80 | 13.5 | 2.1 | 1.0 | 4.6 | 46.0 | 3,280 | 0.250 | 300 |
| 100 | 15.2 | 2.1 | 1.0 | 4.8 | 50.0 | 3,920 | 0.199 | 200 |
Data — 3-Core (2–100 mm²)
| Size (mm²) | Cond. Ø | Insul. | Reinf. | Sheath | OD (mm) | kg/km | R (Ω/km) | IR (MΩ·km) |
|---|---|---|---|---|---|---|---|---|
| 2 | 1.8 | 1.2 | 0.5 | 2.8 | 16.0 | 295 | 10.2 | 500 |
| 3.5 | 2.5 | 1.2 | 0.5 | 2.9 | 17.5 | 390 | 5.54 | 500 |
| 5.5 | 3.1 | 1.2 | 0.5 | 3.0 | 19.0 | 490 | 3.56 | 500 |
| 8 | 3.7 | 1.2 | 0.5 | 3.1 | 21.0 | 605 | 2.52 | 400 |
| 14 | 4.9 | 1.2 | 1.0 | 3.3 | 25.0 | 900 | 1.43 | 400 |
| 22 | 7.0 | 1.6 | 1.0 | 3.7 | 31.0 | 1,440 | 0.919 | 300 |
| 30 | 8.1 | 1.6 | 1.0 | 3.9 | 34.0 | 1,770 | 0.681 | 300 |
| 38 | 9.1 | 1.6 | 1.0 | 4.0 | 36.0 | 2,090 | 0.541 | 300 |
| 50 | 10.4 | 2.1 | 1.0 | 4.3 | 42.0 | 2,760 | 0.423 | 300 |
| 60 | 11.6 | 2.1 | 1.0 | 4.5 | 45.0 | 3,250 | 0.339 | 300 |
| 80 | 13.5 | 2.1 | 1.0 | 4.8 | 49.0 | 4,130 | 0.250 | 300 |
| 100 | 15.2 | 2.1 | 1.0 | 5.0 | 53.0 | 4,960 | 0.199 | 200 |
Data — 4-Core (2–60 mm²) & 5-Core (2–5.5 mm²)
| Size (mm²) | Cond. Ø | Insul. | Reinf. | Sheath | OD (mm) | kg/km | R (Ω/km) | IR (MΩ·km) |
|---|---|---|---|---|---|---|---|---|
| 2 | 1.8 | 1.2 | 0.5 | 2.9 | 17.0 | 350 | 10.2 | 500 |
| 3.5 | 2.5 | 1.2 | 0.5 | 3.0 | 19.0 | 465 | 5.54 | 500 |
| 5.5 | 3.1 | 1.2 | 0.5 | 3.1 | 21.0 | 590 | 3.56 | 500 |
| 8 | 3.7 | 1.2 | 0.5 | 3.2 | 23.0 | 730 | 2.52 | 400 |
| 14 | 4.9 | 1.2 | 1.0 | 3.4 | 27.0 | 1,100 | 1.43 | 400 |
| 22 | 7.0 | 1.6 | 1.0 | 3.9 | 34.0 | 1,790 | 0.919 | 300 |
| 30 | 8.1 | 1.6 | 1.0 | 4.1 | 37.0 | 2,210 | 0.681 | 300 |
| 38 | 9.1 | 1.6 | 1.0 | 4.2 | 40.0 | 2,630 | 0.541 | 300 |
| 50 | 10.4 | 2.1 | 1.0 | 4.6 | 46.0 | 3,480 | 0.423 | 300 |
| 60 | 11.6 | 2.1 | 1.0 | 4.8 | 49.0 | 4,110 | 0.339 | 300 |
| Size (mm²) | Cond. Ø | Insul. | Reinf. | Sheath | OD (mm) | kg/km | R (Ω/km) | IR (MΩ·km) |
|---|---|---|---|---|---|---|---|---|
| 2 | 1.8 | 1.2 | 0.5 | 3.0 | 18.5 | 420 | 10.2 | 500 |
| 3.5 | 2.5 | 1.2 | 0.5 | 3.1 | 21.0 | 565 | 5.54 | 500 |
| 5.5 | 3.1 | 1.2 | 0.5 | 3.2 | 23.0 | 720 | 3.56 | 500 |
Data — 10 to 30-Core (2–3.5 mm²)
| Cores | Size (mm²) | Cond. Ø | Insul. | Reinf. | Sheath | OD (mm) | kg/km | R (Ω/km) | IR (MΩ·km) |
|---|---|---|---|---|---|---|---|---|---|
| 10 | 2 | 1.8 | 1.2 | 0.5 | 3.4 | 27.0 | 790 | 10.2 | 500 |
| 10 | 3.5 | 2.5 | 1.2 | 0.5 | 3.6 | 30.0 | 1,080 | 5.54 | 500 |
| 12 | 2 | 1.8 | 1.2 | 0.5 | 3.4 | 28.0 | 870 | 10.2 | 500 |
| 12 | 3.5 | 2.5 | 1.2 | 0.5 | 3.7 | 32.0 | 1,230 | 5.54 | 500 |
| 16 | 2 | 1.8 | 1.2 | 0.5 | 3.6 | 30.0 | 1,080 | 10.2 | 500 |
| 16 | 3.5 | 2.5 | 1.2 | 0.5 | 3.8 | 34.0 | 1,520 | 5.54 | 500 |
| 20 | 2 | 1.8 | 1.2 | 0.5 | 3.8 | 34.0 | 1,330 | 10.2 | 500 |
| 20 | 3.5 | 2.5 | 1.2 | 0.5 | 4.0 | 38.0 | 1,850 | 5.54 | 500 |
| 24 | 2 | 1.8 | 1.2 | 0.5 | 3.9 | 36.0 | 1,560 | 10.2 | 500 |
| 24 | 3.5 | 2.5 | 1.2 | 0.5 | 4.2 | 41.0 | 2,200 | 5.54 | 500 |
| 30 | 2 | 1.8 | 1.2 | 0.5 | 4.1 | 39.0 | 1,850 | 10.2 | 500 |
| 30 | 3.5 | 2.5 | 1.2 | 0.5 | 4.4 | 44.0 | 2,620 | 5.54 | 500 |
Application Guide
High-Current Reinforced Power (1-Core, 50–150 mm²)
Single-conductor 3PNCT cables provide reinforced high-current feeders for trolley drives and hoist motors on cranes operating in harsh mechanical environments — ship unloaders handling abrasive bulk cargo, steel mill cranes exposed to sparks and scale, mining cranes in dusty quarry environments. The reinforcing layer protects the power cable from falling debris and abrasion that would penetrate standard 2PNCT sheathing.
Reinforced Three-Phase Feeders (3-Core & 4-Core, 8–60 mm²)
Three-phase motor feeder cables with reinforced construction for grab bucket motors, hoist drives, and travel motors on equipment exposed to impact and abrasion. The 4-core variant (L1+L2+L3+PE) provides complete three-phase power plus protective earth in a single mechanically reinforced cable run.
Reinforced Multi-Core Control (10–30 Core, 2–3.5 mm²)
Multi-circuit discrete control cables for PLC I/O, relay logic, limit switches, and interlocks on cranes in harsh environments. The reinforcing layer protects the large number of conductors from external mechanical damage, while the thicker insulation (1.2 mm) provides enhanced individual conductor protection.
Full WALSTOON® Family Comparison
| Feature | 2PNCT | 2PNCT-SB | 2PNCT-PSB | 3PNCT (This Cable) | 3PNCT-SB |
|---|---|---|---|---|---|
| Shield | None | Cu braid | Cu braid | None | Cu braid |
| Reinforcing | None | None | Kevlar® | Textile | Textile |
| Insulation | 0.8–2.5 | 0.8 | 0.8 | 1.2–2.7 | 1.2 |
| Cond. Range | 0.75–250 | 0.75–3.5 | 1.25–3.5 | 2–150 | 2 only |
| Cores | 1–30 | 2–30+P | 2P–12P | 1–30 | 2–30 |
| Mech. Protection | Std | Std | High (tensile) | High (impact) | Highest |
| Best For | Std power | Signals | Long-span | Harsh env. power | Harsh env. signal |
| Cost | Lowest | Medium | High | Med | Med-High |
For cranes operating in the harshest environments (bulk cargo, steel mills, mining), specify WS-FSTN-3PNCT (this cable) for all power and discrete control circuits, and WS-FSTN-3PNCT-SB for shielded signal and communication circuits. Both cables share 3PNCT reinforced construction and identical environmental ratings, ensuring mechanical compatibility on the same festoon system while providing EMI shielding only where needed.
Cost-Effective Feichun Equivalent
Feichun Lead Times: 3–5 weeks. Japanese OEM: 10–16 weeks.
Feichun Pricing: Japanese OEM 3C×22 mm² 3PNCT quoted at ¥4,200–5,500/metre; Feichun: ¥2,100–2,800/metre. Per 200 m: savings of ¥420,000–¥540,000.
Case Study: South American Iron Ore Port: An iron ore export terminal replacing festoon cables on 5 ship loaders needed 6,000 metres total: 1C×80 mm² power cables and 12C×3.5 mm² control cables, all in 3PNCT reinforced specification due to severe abrasive ore dust. Japanese OEM quoted $780,000 with 14-week delivery. Feichun quoted $395,000 with 5-week delivery. After 24 months of continuous operation in extreme dust conditions, zero cable failures — compared to 8–10 month average life previously achieved with standard 2PNCT cables. Total savings: $385,000 plus eliminated replacement costs.
Technical FAQ
When to choose 3PNCT (unshielded reinforced) vs. 2PNCT (unshielded standard)?
Choose 3PNCT whenever the cable environment involves mechanical abuse beyond normal festoon operation: falling material, abrasive dust, crush risk, or physical impact. The reinforcing layer and thicker insulation extend cable life by 40–60% in these conditions. For standard festoon environments without exceptional mechanical hazard, the 2PNCT provides adequate protection at lower cost and lighter weight.
When to choose 3PNCT vs. 3PNCT-SB?
Choose 3PNCT for power and discrete control circuits where EMI shielding is not required. Choose 3PNCT-SB for analogue signals, digital communication, and noise-sensitive circuits where the copper shield braid is needed. Both share identical reinforced construction — the only difference is the shield braid.
Why is the insulation thicker than 2PNCT at every size?
The thicker insulation is part of the 3PNCT enhanced protection philosophy. Combined with the reinforcing layer, it creates significantly greater total wall thickness between conductor and environment. For a 2 mm² conductor: 3PNCT total wall = 1.2 + 0.5 + 2.8 = 4.5 mm vs. 2PNCT = 0.8 + 1.7 = 2.5 mm — almost double the protection.
Expected flex life?
>5 million cycles for conductors ≤3.5 mm², >3 million for larger conductors at 6×OD bending radius. The reinforcing layer does not reduce flex life — it improves mechanical survival between flex cycles. In typical crane service: 10–15+ years in harsh environments where 2PNCT would last 8–12 months.
References & Standards
- JIS C 3327, Rubber-Insulated Cabtyre Cables — Requirements and test methods.
- JIS C 3005, Test methods for rubber and plastics insulated wires and cables.
- IEC 60228, Conductors of insulated cables — Class 5 (flexible).
- IEC 60332-1-2, Vertical flame propagation test.
- FEM 1.001, Rules for the Design of Hoisting Appliances — Section IV.
