Is a megger test required by NEC?

The National Electrical Code (NEC) does not explicitly require megger testing (insulation resistance testing) as a mandatory practice. However, it does emphasize safe installation and maintenance of electrical systems, implying that such tests can be beneficial for verifying insulation integrity. Many local codes and industry standards may recommend or require megger testing, especially for certain applications or in specific industries. Always consult local regulations and industry best practices for guidance.