What is the required distance between support points for messenger wire installations?

The required distance between support points for messenger wire installations is 10 feet. This distance is important for ensuring both structural integrity and the proper functioning of the fire alarm system. When installing messenger wire, maintaining the correct spacing helps prevent sagging and ensures that the wire can adequately support the weight of any attached components, such as fire alarm cables.

Using a 10-foot support interval minimizes the potential for excessive bending or stress on the wire, which could lead to damage or failure over time. This standard also helps to facilitate the installation process, ensuring that wires remain taut and organized, which is crucial in fire alarm installations for both safety and maintenance purposes.