NA2XS(F)2Y cable is a single-core medium-voltage power cable with a stranded aluminium conductor, screened XLPE insulation, copper wire screen and black PE outer sheath. The (F) construction includes longitudinal water-blocking components in the screen area.
Fixed distribution feeders, substations and industrial power routes use this cable type where the installation design calls for an aluminium conductor and a water-blocked screened core. Conductor size, screen area, voltage and route conditions define the final configuration.
CONSTRUCTION
- Conductor
- Stranded aluminium, Class 2
- Insulation
- XLPE with inner and outer semiconductive screens
- Metallic screen
- Copper wires with cross-connection tape; swellable components
- Outer sheath
- Black polyethylene; unarmoured reference design
CHARACTERISTICS
- Reference voltage
- 12/20 (24) kV
- Water blocking
- Longitudinal water blocking in the screen region; no separate radial moisture barrier
- Installation
- Fixed underground, duct and industrial feeder routes
- Standard context
- DIN VDE 0276-620 / HD 620; project-specific IEC requirements
NA2XS(F)2Y for Fixed Power Distribution
Voltage, conductor/screen size and route conditions define the project configuration.
NA2XS(F)2Y Cable Technical Data
Recommended Reference Data: published values for preliminary comparison. Final supply dimensions, ratings and size range follow the agreed XWA datasheet.
| Cable size (mm²) | DC resistance 20°C (Ω/km) | Insulation (mm) | Approx. OD (mm) | Approx. mass (kg/km) | Air (A) | Ground (A) |
|---|---|---|---|---|---|---|
| 1 x 95/16 | 0.320 | 5.5 | 32 | 991 | 280 | 251 |
| 1 x 150/25 | 0.206 | 5.5 | 35 | 1284 | 366 | 319 |
| 1 x 240/25 | 0.125 | 5.5 | 39 | 1661 | 496 | 417 |
| 1 x 300/25 | 0.100 | 5.5 | 41 | 1871 | 569 | 471 |
| 1 x 400/35 | 0.0778 | 5.5 | 44 | 2324 | 660 | 535 |
| 1 x 630/35 | 0.0469 | 5.5 | 51 | 3202 | 883 | 705 |
Single-core aluminium/XLPE/copper-wire-screen/PE, 12/20(24) kV. In 1×240/25, 240 mm² identifies the phase conductor and 25 mm² the metallic screen.
Reference ampacity: one circuit, touching trefoil; air 30°C; ground 20°C, thermal resistivity 1.0 K·m/W and burial depth 0.7 m. Reference maximum conductor temperature: 90°C. Ducts, grouped circuits and bonding require a project calculation.
Longitudinal water blocking and three single-core circuits
Swellable components in the screen region restrict water travel along the cable after moisture enters. A radial barrier or water-blocked conductor can be specified separately; sheath damage requires repair.
The notation 3×1×240 identifies three separate single-core cables, each with a 240 mm² conductor. Each cable has its own sheath, cable entry and screen connection.
Applications and Installation Conditions
Typical applications include utility feeders, transformer-substation connections and industrial distribution. The route design covers mechanical protection, thermal conditions, end sealing and aluminium-compatible connections. Indoor fire requirements determine the appropriate sheath and tests.
The test schedule covers conductor resistance, insulation, partial discharge, sheath integrity and the specified longitudinal water-blocking performance. The official IEC scope describes the fixed-distribution cable framework.
NA2XS(F)2Y and Related Constructions
| Model | Main difference |
|---|---|
| NA2XSY cable | Aluminium conductor and PVC outer sheath instead of PE; longitudinal water blocking is not specified by the NA2XSY designation. |
| N2XS2Y cable | Copper conductor instead of aluminium, with XLPE insulation and a PE sheath; longitudinal water blocking is not specified by the N2XS2Y designation. |
| NA2XS(FL)2Y | Adds a laminated metallic moisture barrier beneath the PE sheath, providing radial moisture protection in addition to longitudinal water blocking. |
NA2XS(F)2Y Cable FAQs
What does (F) mean in NA2XS(F)2Y?
The (F) designation identifies longitudinal water blocking in the specified cable region. A radial barrier and conductor water blocking are additional construction features.
Does an aluminium conductor mean an aluminium screen?
The reference construction uses an aluminium phase conductor and a separate copper wire screen. Screen area follows earth-fault duty and bonding requirements.
Is 3×1×240 the same as a three-core cable?
3×1×240 means three separate single-core cables. A three-core design places three phase cores inside one common outer sheath.
Related: Medium Voltage Cable · Cable Types and Models
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