What must be supported if festoon lighting exceeds specific length limitations?

When festoon lighting exceeds specific length limitations, it is crucial that the system is supported properly to prevent sagging or damage. Messenger wire is specifically designed for this purpose, as it provides the necessary support structure for the lights. By using messenger wire, you ensure that the weight of the festoon lighting is evenly distributed and that it remains securely in place, which is essential for both safety and functionality.

In contrast, while electrical boxes are important for housing connections and providing circuit protection, they do not serve the purpose of physically supporting long runs of festoon lighting. Experience contractors are valuable for ensuring that installations are performed correctly and safely, but their presence does not address the need for physical support of the lighting itself. Additional circuits may be necessary if the existing circuits cannot handle the load, but they also do not fulfill the requirement for supporting the lighting system as the length increases.