XHHW-2 350 kcmil 600 V
Nominal calculation, not one manufacturer's datasheet. The conductor is NEC Chapter 9 Table 8; the insulation and nylon walls are the nominal values the makers catalogue, because UL 83, UL 44 and UL 854 were not read. A wire of the same name can differ slightly: check its datasheet before you specify or order.
By NEC Table 8 and the catalogued walls, XHHW-2 350 kcmil 600 V comes to an overall diameter of about 20.1 mm and a weight of about 1,690 kg/km.
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Main dimensions
| Conductor | Copper 350 kcmil (177 mm²), Ø 16.8 mm | compressed Class B: ICEA S-94-649 Table C-4 as Elastimold prints it; below 2 AWG NEC Table 8 x 0.97 (its note) |
|---|---|---|
| Insulation | XLPE 1.65 mm | XHHW-2 XLPE insulation: Cerrowire and Southwire catalogue values, ICEA S-95-658 Column B (from the Southwire manual; UL 44 not read) |
| Diameter over insulation | 20.1 mm | |
| Overall diameter | 20.1 mm | |
| Weight (approximate) | 1,690 kg/km |
Layer by layer (inside out)
| # | Layer | Material | Thickness mm | Ø over mm | Source | How firmly |
|---|---|---|---|---|---|---|
| 1 | Insulation | XLPE | 1.65 | 20.1 | XHHW-2 XLPE insulation: Cerrowire and Southwire catalogue values, ICEA S-95-658 Column B (from the Southwire manual; UL 44 not read) | maker catalogue value, standard text not read |
THHN / THWN-2, XHHW-2 and USE-2 / RHW-2 are UL type names, not VDE ones: one conductor, its insulation and (THHN) a nylon jacket, no sheath. The conductor is compressed Class B stranding, as North American building wire is made. Sources: research/designer-americas in the site repository.
Materials in this cable: Copper, XLPE
Weight, by part
| Conductors | 1,610 kg/km |
| Metal screens and armour | 0 kg/km |
| Insulation, semicon, tapes, fillers and sheaths | 90 kg/km |
| Total | 1,690 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).