What requirement is placed on portable luminaires according to Article 410?

Portable luminaires are required to have a flexible cord and approved connectors, which allows for greater versatility and ease of movement. This flexibility is crucial as it enables users to reposition the luminaires as needed, accommodating various lighting scenarios and spaces. The use of approved connectors ensures safety and compatibility with electrical systems, reducing the risk of electrical faults or hazards.

Having a flexible cord is substantially important in providing the necessary mobility for portable luminaires while ensuring that the connection to the power source is safe and reliable. This design consideration helps maintain the integrity and functionality of the luminaires when they are frequently moved or adjusted.

While other options might reference valid attributes for lighting devices, such as rigidity in cords or specific types of bulbs, they do not align with the NEC requirements for portable luminaires, emphasizing the necessity of both flexibility and safety in electrical connections.