TYPE 441

Type 441 exists in two distinct classes. The 1.1/1.1 kV variant (441.1) is Class 2, using R-EP-90 insulation. The 3.3–22 kV variants (441.3 to 441.22) are Class 1, requiring the higher-grade XR-EP-90 insulation and extra heavy-duty XHD sheathing — reflecting the more demanding dielectric and mechanical requirements at elevated voltages.

Type 441 is an individually screened, three-core trailing cable for open cut and surface mining. Unlike Types 409 and 440 which use a collective composite screen, each power core in Type 441 carries its own semiconductive elastomer insulation screen — enabling per-phase earth fault detection and suitable operation in high-resistance earthed systems.

Dual-class cable: 441.1 = Class 2 (R-EP-90 / HD sheath) | 441.3–22 = Class 1 (XR-EP-90 / XHD sheath)

Individual screen degradation under repeated flex: Semiconductive elastomer screen is bonded to the insulation and designed for the trailing/reeling duty cycle; screen conductance is verified during manufacture per AS/NZS 2802.

Earth fault misidentification in collective-screen cables: Individual screening allows per-phase fault current to return on its own screen, enabling single-phase earth fault detection without tripping healthy phases — a key advantage over Types 409/440.

Insulation degradation at Class 1 voltages: XR-EP-90 (Class 1) provides superior long-term dielectric performance over R-EP-90 at 3.3–22 kV.

Flame retardant and self-extinguishing per AS/NZS 2802. Class 1 cables use XHD-85-PCP or XHD-90-CSP/CPE sheath for enhanced performance. Class 2 (441.1) uses HD-85-PCP or HD-90-CSP/CPE.

Choose 441 over Types 409/440 whenever per-core fault detection is required. For 3.3–22 kV with a composite (not semiconductive) screen, refer to Type 450/451 (Class 1). For underground individually screened feeder cables, refer to AS/NZS 1972 feeder types

ZNE[size]-441.[voltage]
e.g. ZNE95-441.6 = 95 mm2 Type 441 at 6.6/6.6 kV (Class 1)

Standard: AS/NZS 2802:2000 — Class 2 (Table 15)

Voltage: 1.1/1.1 kV (U0/U)

Configuration: 3C-IS + 3E interstitial + central pilot + SC screen over assembly

Conductor: Tinned annealed Cu, rope-lay (Class 5 flex) per AS/NZS 1125

Insulation: R-EP-90 per AS/NZS 3808 | ti 1.5–3.0 mm

Individual Screen: Semiconductive elastomer per core

SC assembly screen: Semiconductive elastomer fill + screen over core assembly

Reinforcement: Over core assembly screen per AS/NZS 2802 Cl. 19

Outer sheath: HD-85-PCP or HD-90-CSP/CPE per AS/NZS 3808

Standard: AS/NZS 2802:2000 — Class 1 (Table 16)

Voltage: 3.3/3.3 kV to 22/22 kV (U0/U)

Configuration: 3C-IS + 3E interstitial + central pilot + SC screen over assembly

Conductor Screen: Extruded semiconductive elastomer per core (Class 1 requirement)

Insulation: XR-EP-90 per AS/NZS 3808 | ti 2.2–7.6 mm

Insulation screen: Semiconductive elastomer — bonded to insulation (6.6 kV+)

Insulation screen: Semiconductive elastomer — bonded to insulation (6.6 kV+)

SC assembly screen: Semiconductive elastomer fill + screen over core assembly

Reinforcement: Over core assembly screen per AS/NZS 2802 Cl. 19

Outer sheath: XHD-85-PCP or XHD-90-CSP/CPE per AS/NZS 3808

• Open cut electric shovels and draglines — high-resistance earthed systems
• Surface mine applications where per-phase earth fault detection is mandated
• Open pit drill rigs with selective earth fault relay protection
• Portable substations with phase-selective earth fault monitoring
• Surface conveyors with per-core insulation monitoring systems
• Mine dewatering pumps at 3.3–22 kV in isolated earthed networks