4 inch rigid conduit
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For a 400 amp service, you would typically use a minimum of 3-inch rigid metal conduit (RMC) to accommodate the large conductors required for that amperage. It's essential to consult local electrical codes and regulations to ensure compliance with sizing requirements for your specific installation.
For a 400 amp service, it is recommended to use 3-inch conduit to allow for the appropriate wire size and future updates. This will provide enough space for the conductors to be pulled through without causing damage. It is important to verify the specific requirements with local building codes and regulations.
It depends on the length of the run
For a 400 Amp service with 500 MCM conductors, the minimum size grounding electrode conductor required would be 3/0 AWG copper or 250 kcmil aluminum based on the NEC Table 250.66.
For a 200 amp service over a 400 foot run, you would need to use at least a 2-inch conduit to accommodate the size of the aluminum wire required. You would typically use 3/0 aluminum wire for this setup to ensure efficient power transmission and meet code requirements for voltage drop. It's recommended to consult with a licensed electrician to determine the exact specifications for your specific setup.
The maximum capacity for a 400 amp service is typically 400 amps. This means the service can supply up to 400 amps of electrical current to a building or property. It is important to ensure that the electrical system and components are designed to handle this capacity safely.