What does the "J" designation in "S-type" flexible cords indicate?

The "J" designation in "S-type" flexible cords refers to junior size. This designation is part of the overall classification system for flexible cords, where "S" stands for service cord and "J" identifies a specific type that is smaller and more flexible than its counterparts.

Understanding the designation is essential for selecting the right type of cord for different applications, as the junior size translates to lighter weight and enhanced flexibility, making it suitable for a variety of temporary power needs such as in construction or entertainment settings.

This classification assists electricians and contractors in determining the appropriateness of the cord based on the required current capacity and application, ensuring safety and efficiency in use.