What does the "W" suffix in any of the "S-type" flexible cords designate?

The "W" suffix in S-type flexible cords designates that the cord is suitable for wet locations. This marking indicates that the insulation and overall construction of the cord can withstand exposure to moisture, which is crucial for electrical safety in environments where water or high humidity is present. Such specifications ensure that the use of these cords complies with safety standards necessary to prevent electrical hazards, such as short circuits or shock, that can occur in wet conditions. Understanding this designation is important for making informed choices when selecting flexible cords for various applications, especially in outdoor or potentially damp environments.