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Wire Size for 200 Amps
A 200-amp load at 240 V over a 100 ft run needs 3/0 AWG copper (200 A rating · 3.06 V drop (1.3%)). Change the distance or voltage to re-size.
Wire Size for 200 Amps
Minimum wire size200 A rating · 3.06 V drop (1.3%)
| Size | Ampacity | Voltage drop |
|---|---|---|
| 14 AWG | 20 A | 122.8 V (51.2%) |
| 12 AWG | 25 A | 77.2 V (32.2%) |
| 10 AWG | 35 A | 48.4 V (20.2%) |
| 8 AWG | 50 A | 30.56 V (12.7%) |
| 6 AWG | 65 A | 19.64 V (8.2%) |
| 4 AWG | 85 A | 12.32 V (5.1%) |
| 3 AWG | 100 A | 9.8 V (4.1%) |
| 2 AWG | 115 A | 7.76 V (3.2%) |
| 1 AWG | 130 A | 6.16 V (2.6%) |
| 1/0 AWG | 150 A | 4.88 V (2%) |
| 2/0 AWG | 175 A | 3.87 V (1.6%) |
| 3/0 AWG | 200 A | 3.06 V (1.3%) |
| 4/0 AWG | 230 A | 2.43 V (1%) |
| 250 kcmil | 255 A | 2.06 V (0.9%) |
| 300 kcmil | 285 A | 1.72 V (0.7%) |
| 350 kcmil | 310 A | 1.47 V (0.6%) |
| 500 kcmil | 380 A | 1.03 V (0.4%) |
NEC Table 310.16 (75 °C column), 240.4(D) small-conductor limits and Chapter 9 Table 8 resistance. Apply continuous-load (125%), ambient temperature and bundling corrections, and follow your local code and AHJ.
Planning estimates only. Building codes, loads and material specs vary — have a licensed engineer or contractor confirm quantities and safety requirements. Disclaimer
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