What is the recommended direction for washing insulators?

Washing insulators from bottom to top is recommended primarily to prevent water and contaminants from flowing toward the fittings and hardware that are critical for secure installation. When water is applied from the bottom, it minimizes the risk of dirt and debris accumulating in areas that are more challenging to clean. This method helps ensure that any contaminants are flushed away from the insulator surface, allowing for more effective cleaning and maintenance.

Additionally, if the insulator is washed from top to bottom, there’s a risk of allowing debris to flow downwards into the insulator's connections, potentially leading to short circuits or other electrical issues. The suggested direction enhances not only cleanliness but also the operational reliability of the insulators.