What are the three main parts of an insulator?

The three main parts of an insulator are accurately identified as the base, cap, and body. The base serves as the attachment point for the insulator to the overhead structure, providing stability and support. The cap, located at the top, helps connect the insulator to the electrical wire and plays a crucial role in maintaining the insulator's integrity under various environmental conditions. The body serves as the main insulating component, preventing electrical current from passing through the insulator itself. Understanding these components is essential for recognizing how insulators function in electrical and railway systems to ensure safety and reliability.

The choice you selected, which included terms that are not standard parts of insulators, does not represent the accepted nomenclature in electrical engineering or railroading contexts. Familiarity with the correct components is vital for anyone working with insulators in these fields.