What is the required design for fuseholders to prevent incorrect fuse use?

The requirement for fuseholders to prevent incorrect fuse use emphasizes that they must be designed in such a way that incorrect sizing of fuses is not possible. This means that the fuseholder should be specifically tailored to accommodate only the correct size and class of fuse that it is designed for, ensuring that users cannot place a fuse that does not meet the specifications necessary for the application's safety and operational standards. This design consideration helps to prevent potential hazards such as electrical fires or equipment damage that could arise from using an incorrect fuse, which may not handle the electrical load as intended.

Ensuring that only compatible fuses can be used promotes safety and reliability in electrical systems, a critical aspect of electrical maintenance and setup. Other design considerations, like ease of use or general compatibility with any class of fuse, do not directly contribute to the prevention of incorrect fuse usage and could lead to safety risks if not managed correctly.