What is graded rubber?

Graded rubber refers to a standard adopted for rubber insulation, particularly in the context of electrical installations as outlined by the National Electrical Code (NEC). This material is classified based on its properties, including resistance to heat, moisture, and electrical stress, making it suitable for various electrical applications.

The NEC emphasizes the importance of using materials that meet certain criteria to ensure safety and performance in electrical systems. Graded rubber is specifically designed to meet these criteria, providing reliable insulation that can withstand environmental factors and electrical demands. This characteristic is crucial in preventing electrical failures and ensuring the longevity of insulation materials.

Understanding the need for graded rubber in electrical systems helps in recognizing its importance in maintaining safety standards.