How deep should underground wire be installed?

Underground wire should typically be installed at a depth of at least 24 inches when using non-metallic conduit, such as PVC, and at least 18 inches when using metallic conduit. For direct burial cable, a minimum depth of 24 inches is generally recommended. Local codes may vary, so it's important to check with local regulations and utility companies for specific requirements. Always ensure proper marking and protection to prevent damage during installation.