What type of cord must be used for the electric discharge luminaires as per WAC?

The use of a flexible cord rated for hard or extra hard usage for electric discharge luminaires is crucial for safety and performance standards. These rigid specifications ensure that the cord can withstand the environmental and mechanical stresses typically encountered in the application of electric discharge lighting.

Hard or extra hard usage cords are designed to be more durable and to resist wear and tear. They can handle higher temperatures and are built to endure a variety of conditions, such as exposure to moisture, abrasion, and physical impact. This is especially important in situations where luminaires may be used in demanding settings.

The other options lack the necessary specifications that assure durability and safety. Outdoor-rated cords, while suitable for external environments, may not meet the same robustness as hard usage cords. Heavy-duty cords with locking mechanisms might offer additional security but may not be specifically rated for the demands of electric discharge applications. Standard extension cords typically do not meet the rigorous requirements for the electrical loads and environmental factors associated with luminaires. Thus, the requirement for flexible cords rated for hard or extra hard usage ensures compliance with safety regulations and optimizes the function and longevity of the equipment.