To safely carry 200 amps over a distance of 500 feet with a 120V supply, you will need to take into consideration both the wire gauge and potential voltage drop over such a long run.

1. Wire Gauge Recommendations: According to the data retrieved, the National Electrical Code (NEC) states that for a 200-amp service:

   • 2/0 AWG copper wire or
   • 4/0 AWG aluminum wire or copper-clad wire is required.

   These sizes ensure safe operation and compliance with electrical codes.

2. Voltage Drop Considerations: Since you are planning a long run (500 feet), voltage drop becomes a critical factor. It is often recommended to keep voltage drop below 3% for feeders to minimize energy loss and ensure efficiency. For detailed calculations on voltage drop specific to your setup, you can refer to tools such as the Voltage Drop Tables or Wire Size Calculator offered by various resources.

3. Additional Resources: If you need further guidance on ampacity or to ensure you're following local codes, the Ampacity Charts provide essential information for selecting appropriate wire sizes based on your needs.

In conclusion, for your specific situation of a 500-foot run at 200 amps, you would generally use 2/0 AWG copper wire or 4/0 AWG aluminum wire, taking into account voltage drop related to the long distance. Always consult local electrical codes and, if necessary, a qualified electrician to confirm the right gauge wire for your project.

Sources

what size wire will I need to run underground for 200 amp service? NotAmpacity Charts | Wire Gauge Chart - CerrowireVoltage Drop Tables | CerrowireWire Size Calculator - WireBarnDC Wire Size CalculatorWire Size for 200-Amp Service | AngiWhat size of wire is needed for a 200 amp service 1000 feet away?

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