Class 1: General electronic products, for objects where the functionality of the final product is the major requirement. This can include objects such as toys and other items that do not serve a critical purpose.
Class 2: Dedicated service electronic products, where consistent and extended performance is needed, but uninterrupted service is not vital. The failure of this product would not result in significant failures or danger.
Class 3: High performance electronic products, for products that require continued and consistent performance and where periods of inoperativeness cannot be tolerated. The environment in which these cable harnesses are used may be “uncommonly harsh.” This category encompasses devices involved in life support systems or that are used in military.