Change any value to update the result.
3.36 V · 2.8 % · 116.64 V at load
Drop · share · load voltage: 3.36 V · 2.8 % · 116.64 V at loadEnter current, one-way length and supply voltage. Choose DC, single-phase or balanced three-phase and a conductor. Read drop in V and %, plus voltage at the load. AC presets use Schneider's XLPE table for lighting (cos φ=1) or motors (0.8); manual AC is a resistance-only estimate, not a wiring approval.
Held fixed: Circuit DC, Current (A) 10.000 A, One-way run length 20.000 m, Supply voltage (V) 120.00 V, Conductor / cross-section Manual ρ / cross-section, AC load model (ignored for DC) Lighting, cos φ = 1, Resistivity (manual only) 0.000000016800 Ω·m.
| Cross-section (manual only) (m²) | Drop · share · load voltage |
|---|---|
| 0.000000500000 | 13.44 V · 11.2 % · 106.56 V at load |
| 0.000001000000 | 6.72 V · 5.6 % · 113.28 V at load |
| 0.000001500000 | 4.48 V · 3.733 % · 115.52 V at load |
| 0.000002000000Your value | 3.36 V · 2.8 % · 116.64 V at load |
| 0.000002500000 | 2.688 V · 2.24 % · 117.312 V at load |
| 0.000003000000 | 2.24 V · 1.867 % · 117.76 V at load |
| 0.000003500000 | 1.92 V · 1.6 % · 118.08 V at load |
| 0.000004000000 | 1.68 V · 1.4 % · 118.32 V at load |
3.36 V · 2.8 % · 116.64 V at load
Open with these values3.78 V · 3.15 % · 116.22 V at load
Open with these values9.4 V · 7.833 % · 110.6 V at load
Open with these valuesDC: ΔV = 2ILρ/A; AC presets: ΔV = KIL (L in km, K from cable table)
| Mode, current, one-way length, conductor | What that run is | Voltage drop (V) |
|---|---|---|
| 5, 10, 0.0000000168, 0.0000015 | 5 A over 10 m of 1.5 mm² copper | 1.12 |
| 30, 25, 0.0000000168, 0.00001 | 30 A over 25 m of 10 mm² copper | 2.52 |
| 10, 20, 0.0000000168, 0.000002 | 10 A over 20 m of 2 mm² copper | 3.36 |
| 15, 30, 0.0000000168, 0.000004 | 15 A over 30 m of 4 mm² copper | 3.78 |
| 20, 50, 0.0000000282, 0.000006 | 20 A over 50 m of 6 mm² aluminium | 9.40 |
| Single-phase, 20 A, 20 m, Cu 2.5 mm² | Schneider lighting table, K = 19 V/A/km | 7.60 |
| Three-phase, 100 A, 50 m, Cu 35 mm² | Schneider motor table, K = 1 V/A/km | 5.00 |
For manual DC, use 2 × one-way length × current × resistivity / area. The selected AC cable tables already include the circuit and load factors; multiply their K by amperes and one-way kilometres.
DC and single-phase circuits include the return path; balanced three-phase uses a different phase factor. Enter the distance from supply to load once: the formula or sourced cable coefficient handles the circuit path.
The cited Schneider table models copper or aluminium XLPE cable, with lighting at cos φ = 1 or motor normal service at cos φ = 0.8. Its rounded K values include resistance, reactance and circuit geometry; manual AC input omits reactance and is only a resistance-based approximation.
No. This result estimates voltage loss on the entered run only; it excludes upstream loss, ampacity, overcurrent protection, installation method and local code requirements. Have a qualified professional assess an actual installation.
The one-way distance accepts metres or feet; the calculator converts feet internally. Cable presets are named by mm², while the legacy manual cross-section is entered in m² (1 mm² = 0.000001 m²). Supply and load voltages use the same V basis.
For the simple DC run, current times voltage drop estimates heat lost in the pair of conductors. The three-phase AC loss is not generally obtained by multiplying its displayed line-to-line drop by current.
Diese Seite gibt es auch auf Deutsch.
Zu Deutsch wechseln