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🇺🇸 NEC NFPA 70 · Table 310.16 (75°C) · Voltage Drop Analysis

60 Amp Wire Size at 600 Feet (240V Split-Phase (US Dryer / EV / Subpanel))

Complete conductor sizing, Ohm's law voltage drop, $I^2R$ line power loss, and circuit breaker specification for a 60 A load over a 600 ft (182.9 m) one-way run.

Copper Wire (≤3% Drop)2/0 AWG67.43 mm² · Drop: 2.9%
Aluminum Wire (≤3% Drop)250 kcmilDrop: 6.11V (2.55%)
Voltage at Load End233.0 VLoss: 6.96 V (417.9 W)
Power & Breaker (125%)14.4 kW80A Breaker Recommended

All AWG & kcmil Wire Gauges for 60 Amps at 600 Feet (240V)

Wire GaugeMetric AreaNEC 75°C Cu Ampacity Copper Voltage DropLoad VoltageAluminum DropLine Loss ($I^2R$)NEC Status
14 AWG2.08 mm²15 A225.79 V (94.08%)14.2 V372.44 V (155.18%)13547.2 WDrop/Amp High
12 AWG3.31 mm²20 A141.88 V (59.12%)98.1 V234.04 V (97.52%)8513.0 WDrop/Amp High
10 AWG5.26 mm²30 A89.28 V (37.2%)150.7 V147.28 V (61.37%)5357.1 WDrop/Amp High
8 AWG8.37 mm²50 A56.11 V (23.38%)183.9 V92.55 V (38.56%)3366.6 WDrop/Amp High
6 AWG13.3 mm²65 A35.31 V (14.71%)204.7 V58.25 V (24.27%)2118.7 WDrop/Amp High
4 AWG21.15 mm²85 A22.21 V (9.25%)217.8 V36.63 V (15.26%)1332.3 WDrop/Amp High
3 AWG26.67 mm²100 A17.61 V (7.34%)222.4 V29.05 V (12.1%)1056.5 WDrop/Amp High
2 AWG33.62 mm²115 A13.97 V (5.82%)226.0 V23.04 V (9.6%)838.1 WDrop/Amp High
1 AWG42.41 mm²130 A11.07 V (4.61%)228.9 V18.27 V (7.61%)664.4 W~ ≤5%
1/0 AWG53.49 mm²150 A8.78 V (3.66%)231.2 V14.48 V (6.03%)526.8 W~ ≤5%
2/0 AWG67.43 mm²175 A6.96 V (2.9%)233.0 V11.49 V (4.79%)417.9 W✓ PASS (≤3%)
3/0 AWG85.01 mm²200 A5.52 V (2.3%)234.5 V9.11 V (3.8%)331.5 W✓ PASS (≤3%)
4/0 AWG107.2 mm²230 A4.38 V (1.83%)235.6 V7.23 V (3.01%)262.9 W✓ PASS (≤3%)
250 kcmil126.7 mm²255 A3.71 V (1.54%)236.3 V6.11 V (2.55%)222.4 W✓ PASS (≤3%)
300 kcmil152.0 mm²285 A3.09 V (1.29%)236.9 V5.1 V (2.12%)185.4 W✓ PASS (≤3%)
350 kcmil177.3 mm²310 A2.65 V (1.1%)237.4 V4.37 V (1.82%)158.9 W✓ PASS (≤3%)
400 kcmil202.7 mm²335 A2.32 V (0.97%)237.7 V3.82 V (1.59%)139.0 W✓ PASS (≤3%)
500 kcmil253.4 mm²380 A1.85 V (0.77%)238.1 V3.06 V (1.27%)111.2 W✓ PASS (≤3%)
600 kcmil304.0 mm²420 A1.54 V (0.64%)238.5 V2.55 V (1.06%)92.7 W✓ PASS (≤3%)
750 kcmil380.0 mm²475 A1.24 V (0.51%)238.8 V2.04 V (0.85%)74.2 W✓ PASS (≤3%)
1000 kcmil506.7 mm²545 A0.93 V (0.39%)239.1 V1.53 V (0.64%)55.6 W✓ PASS (≤3%)

Frequently Asked Engineering Questions

What size copper wire do I need for 60 amps at 600 feet (240V)?

To stay within the NEC recommended 3% maximum voltage drop for a 60A load over 600 feet one-way at 240V (1-Phase), you need 2/0 AWG copper wire. This produces a voltage drop of 6.96V (2.9%) and delivers 233.0V at the load.

What size aluminum wire is required for 60 amps at 600 feet?

Using aluminum conductors (75°C rating), you should use 250 kcmil to maintain voltage drop at 6.11V (2.55%).

What breaker size is needed for a 60A continuous load?

Under NEC 210.20(A), continuous loads require a circuit breaker rated at 125% of the continuous current (60A × 1.25 = 75.0A), which corresponds to a standard 80A circuit breaker.