How far from AC power lines should fire alarm cables be installed?

Fire alarm cables should be installed at least 3 feet away from AC power lines. This distance is recommended to prevent electromagnetic interference, which can disrupt the proper functioning of fire alarm systems. AC power lines can create electrical noise and fluctuations that may negatively impact the signals transmitted by fire alarm cables. Maintaining this separation helps ensure reliable operation and enhances the overall safety of the fire alarm system.

In addition to preventing interference, adhering to this distance is often in line with industry standards and codes that govern electrical installations, promoting compliance with safety regulations. Therefore, the 3-foot guideline is important for both performance and regulatory reasons.