N2XH 4x25 RM 0,6/1 kV
IEC nominal calculation, not manufacturer data. The thicknesses are the nominal values of the construction standards, added up layer by layer. A manufacturer's cable of the same name can differ by a few millimetres and by 10 to 20 % in weight: always check its datasheet before you specify, order or lay a cable.
By the IEC construction rules, N2XH 4x25 RM 0,6/1 kV comes to an overall diameter of about 24.6 mm and a weight of about 1,330 kg/km.
Open this cable in the designer Change any layer, see it in 3D and to scale, and download it.
Main dimensions
| Conductor | Copper 25 mm² RM, Ø 6.1 mm | IEC 60228 class 2 compacted, middle of min / max |
|---|---|---|
| Insulation | XLPE 0.9 mm | IEC 60502-1:2004 Tables 5-7, nominal insulation thickness |
| Diameter over insulation | 7.9 mm | |
| Core diameter | 7.9 mm | |
| Overall diameter | 24.6 mm | |
| Weight (approximate) | 1,330 kg/km |
Round conductors (IEC 60228 class 2 compacted; class 1 solid up to 10 mm²).
Layer by layer (inside out)
| # | Layer | Material | Thickness mm | Ø over mm | Source | How firmly |
|---|---|---|---|---|---|---|
| 1 | Insulation | XLPE | 0.9 | 7.9 (on each core) | IEC 60502-1:2004 Tables 5-7, nominal insulation thickness | as manufacturers publish it, table not read |
| 2 | Filler | PP | fills the space between the cores | 19.0 | ||
| 3 | Inner covering / bedding | Halogen-free (LSZH) | 1.0 | 21.0 | IEC 60502 Table 8, extruded inner covering by the fictitious diameter over the laid-up cores (Annex A) | read in the standard |
| 4 | Sheath | Halogen-free (LSZH) | 1.8 | 24.6 | IEC 60502 clause 13 / 14.3, oversheath: 0.035 D + 1.0 mm, D the fictitious diameter (Annex A) | read in the standard |
Diameters add up the nominal layers. Where IEC 60502 sizes a layer by the fictitious diameter of its Annex A, the calculated diameter is used instead, which can move a value one step. Low voltage insulation (IEC 60502-1) is as manufacturers publish it; the table itself was not read. Sources and page numbers: research/mv-dimensions in the site repository.
Weight, by part
| Conductors | 920 kg/km |
| Metal screens and armour | 0 kg/km |
| Insulation, semicon, tapes, fillers and sheaths | 400 kg/km |
| Total | 1,330 kg/km |
|---|
Each layer's cross-section times its density; stranded conductors, laid-up cores and helical wires count 2 % longer than the cable. Densities: copper 8.89 and aluminium 2.703 g/cm³ (the values of IEC 60028 and IEC 60889); XLPE 0.92, PE 0.94, PVC 1.45, semicon 1.12, steel 7.85 g/cm³ (usual compound values).