What is the difference between a class 3 and a class 4 conduit?

Class 3 and Class 4 conduits refer to different levels of fire resistance and safety ratings in electrical installations. Class 3 conduits generally provide a lower level of protection against environmental factors and are suitable for less critical applications. In contrast, Class 4 conduits offer higher fire resistance and are designed for more demanding environments, ensuring enhanced safety and performance. This distinction is important for compliance with specific building codes and safety regulations.