UF-B 10/3 W/G 600 V
Nominal calculation, not one manufacturer's datasheet. The conductors are NEC Chapter 9 Table 8; the insulation, nylon and jacket walls and the ground are the values the makers print, and the web of jacket between the conductors is fitted to three makers' widths, because UL 493 was not read. Check the datasheet before you specify or order.
By NEC Table 8 and the makers' walls, UF-B 10/3 W/G 600 V comes to about 19.5 × 5.8 mm (width × thickness) and a weight of about 310 kg/km.
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Main dimensions
| Conductor | Copper 10 AWG (5.3 mm²), Ø 2.6 mm | NEC 2026 Chapter 9 Table 8: Class B concentric or solid diameter |
|---|---|---|
| Insulation | PVC 0.51 mm | UF-B conductor PVC insulation: 15 mil to 12 AWG, 20 at 10 AWG, 30 at 8 and 6 (Service Wire; Southwire and Cerrowire the same sums; UL 493 not read) |
| Diameter over insulation | 3.6 mm | |
| Core diameter | 3.8 mm | |
| Width × thickness | 19.5 × 5.8 mm | |
| Weight (approximate) | 310 kg/km |
Layer by layer (inside out)
| # | Layer | Material | Thickness mm | Ø over mm | Source | How firmly |
|---|---|---|---|---|---|---|
| 1 | Insulation | PVC | 0.51 | 3.6 (on each core) | UF-B conductor PVC insulation: 15 mil to 12 AWG, 20 at 10 AWG, 30 at 8 and 6 (Service Wire; Southwire and Cerrowire the same sums; UL 493 not read) | maker catalogue value, standard text not read |
| 2 | Nylon jacket (polyamide) | Nylon (PA) | 0.10 | 3.8 (on each core) | UF-B conductor nylon jacket: 4 mil to 10 AWG, 5 at 8 and 6 (Service Wire; UL 493 not read) | maker catalogue value, standard text not read |
| 3 | Sheath | PVC | 1.02 | 5.8 | UF-B gray PVC jacket, solid between the conductors: 40 mil to 10 AWG, 48 at 8, 55 at 6; the makers print 30 / 45 mil minimums, the values are fitted to five makers' thicknesses | maker catalogue value, standard text not read |
UF-B is the UL 493 underground feeder cable of NEC Article 340: copper conductors in PVC and nylon and a bare ground, laid apart in a row in a solid gray PVC jacket that fills between them, no paper. Every size is flat, three conductors too. Its ampacity is that of 60 °C conductors (NEC 340.80). Checked against Southwire, Cerrowire and Service Wire: research/designer-americas/nm-b.md in the site repository.
Materials in this cable: Copper, PVC
Weight, by part
| Conductors | 190 kg/km |
| Metal screens and armour | 0 kg/km |
| Insulation, semicon, tapes, fillers and sheaths | 120 kg/km |
| Total | 310 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).