Center pivot amp draw & voltage drop
Span cable, tower current, last-tower voltage, generator sizing.
Reid Bros. · American Irrigation · 9/19/2026
Yellow fields are inputs — everything else calculates live, same as the original workbook.
Span groups
| Group | Quantity | Length, ft |
|---|---|---|
| 1 | ||
| 2 | ||
| 3 | ||
| 4 | ||
| 5 | ||
| 6 |
System current, A
5.34
Voltage drop, V
6.33
Last tower voltage
473.67
Length to LRDU, ft
1,260
Power, kW
3.55
Generator HP req.
5.95
kW generator (min)
5.0
kW generator (rec.)
7.5
Drive units 7 · std motors 7 · high motors 0 · wire 8/10/12/14 ga: 0/7/0/0
Span table
| # | Length | Wire | HP | RPM | Amps | Volts | Drop |
|---|---|---|---|---|---|---|---|
| 1 | 180 | 10 | 0.6 | 34 | 5.34 | 478.74 | 1.26 |
| 2 | 180 | 10 | 0.6 | 34 | 5.15 | 477.52 | 1.22 |
| 3 | 180 | 10 | 0.6 | 34 | 4.77 | 476.40 | 1.13 |
| 4 | 180 | 10 | 0.6 | 34 | 4.20 | 475.41 | 0.99 |
| 5 | 180 | 10 | 0.6 | 34 | 3.45 | 474.59 | 0.81 |
| 6 | 180 | 10 | 0.6 | 34 | 2.51 | 474.00 | 0.59 |
| 7 | 180 | 10 | 0.6 | 34 | 1.38 | 473.67 | 0.32 |