Wire Sizing

Wire Size for Barn — 60 Amp 150 Feet

Pre-calculated NEC-compliant wire size for 60 amps at 150 feet on a 240V single-phase circuit. Immediate answer below.

Recommended Wire Size

Copper

4 AWG

Voltage drop: 2.31% (5.54V)

Voltage at load: 234.5V

Controlling factor: Voltage Drop (3% limit)

Aluminum

2 AWG

Voltage drop: 2.39% (5.74V)

Voltage at load: 234.3V

Controlling factor: Voltage Drop (3% limit)

Based on NEC Table 310.16 (75°C column), single-phase, 240V, 3% max voltage drop, one-way distance 150 ft.

Wire Comparison Table

Wire Size	Ampacity	V-Drop (V)	V-Drop (%)	V at Load
14 AWG	15A	56.52V	23.55%	183.5V
12 AWG	20A	35.64V	14.85%	204.4V
10 AWG	30A	22.32V	9.3%	217.7V
8 AWG	50A	14V	5.84%	226V
6 AWG	65A	8.84V	3.68%	231.2V
4 AWGREC	85A	5.54V	2.31%	234.5V
3 AWG	100A	4.41V	1.84%	235.6V
2 AWG	115A	3.49V	1.46%	236.5V
1 AWG	130A	2.77V	1.16%	237.2V
1/0 AWG	150A	2.2V	0.92%	237.8V
2/0 AWG	175A	1.74V	0.73%	238.3V
3/0 AWG	200A	1.38V	0.57%	238.6V
4/0 AWG	230A	1.09V	0.46%	238.9V
250 kcmil	255A	0.93V	0.39%	239.1V
300 kcmil	285A	0.77V	0.32%	239.2V
350 kcmil	310A	0.66V	0.28%	239.3V
400 kcmil	335A	0.58V	0.24%	239.4V
500 kcmil	380A	0.46V	0.19%	239.5V

Table shows all standard AWG/kcmil sizes for 60A at 150 ft on 240V (copper). Green check = meets both ampacity and 3% voltage drop. REC = smallest compliant size.

Key Considerations

For a 60A circuit at 150 feet on 240V, both ampacity and voltage drop must be satisfied. NEC recommends keeping the total voltage drop (feeder + branch) under 5%, with no more than 3% on either segment alone.

Copper conductors at 75°C column (THHN/THWN-2) are assumed. If using 60°C terminations, derate the ampacity to the 60°C column values. Verify the temperature rating of your terminals.

Frequently Asked Questions

What size wire do I need for a 60 amp service at 150 feet?▾

For a 60A/240V circuit at 150 feet, use 4 AWG copper (2.31% drop) or 2 AWG aluminum. This keeps voltage drop within the NEC-recommended 3% limit.

Can I use aluminum wire for a 60 amp circuit?▾

Yes. Aluminum wire is a cost-effective alternative for larger circuits. For 60A at 150 feet, use 2 AWG aluminum (2.39% voltage drop). Aluminum requires AL-rated connectors and anti-oxidant compound at all terminations.

What happens if the voltage drop exceeds 3%?▾

Voltage drop above 3% reduces equipment efficiency, can cause motors to overheat, and may violate NEC 210.19(A) Informational Note No. 4. For a 60A circuit at 150 feet on 240V, exceeding 3% means the load receives less than 232.8V, which can damage sensitive electronics and shorten appliance lifespan.

Related Wire Size Calculations

60A / 200 ft

Wire Size for Barn — 60 Amp 200 Feet

60A / 150 ft

What Size Wire for 60 Amp 150 Feet Away

60A / 100 ft

Wire Size for 60 Amp EV Charger 100 Feet

60A / 100 ft

Wire Size for 60 Amp Sub-Panel 100 Feet

60A / 200 ft

What Size Wire for 60 Amp 200 Feet Away

Need a Custom Calculation?

Different voltage, three-phase, or custom max drop percentage? Use our interactive calculator.

Wire Size Calculator