Which of the following is a characteristic of graded rubber?

Graded rubber is designed to meet specific requirements for insulation, particularly in electrical applications. It is classified based on its insulating properties and temperature resistance, making it suitable for use in environments where certain safety standards must be adhered to. Therefore, stating that it is a minimum requirement for rubber insulation signifies its essential role in ensuring protection from electrical hazards and its adherence to regulatory standards.

This characteristic underscores that graded rubber is necessary for effective insulation in various applications, particularly in contexts requiring stringent safety measures. Understanding the role of graded rubber in providing insulation is crucial for applications in electrical engineering and safety compliance, making it an important aspect of the material's definition and use.