When a relay controls fire safety functions, it must be within how many feet of the control circuit?

The correct answer is three feet, as this distance is in line with the requirements outlined in applicable codes and standards for fire alarm systems. The proximity of a relay to the control circuit is crucial for several reasons, primarily relating to both functionality and safety.

A relay is used in fire alarm systems to control various fire safety functions such as initiating alarm signals, activating suppression systems, or controlling ventilation systems in response to fire conditions. Maintaining a distance of three feet ensures that signal integrity is preserved, avoiding potential issues with electromagnetic interference that could compromise the operation of the system.

In addition, the three-foot distance is practical for minimizing the risk of accidental disconnection or damage to the wiring that might occur if the relay were installed at a greater distance. This more compact arrangement also facilitates easier maintenance and troubleshooting, as service personnel can access components without extensive procedures.

Ultimately, following the three-foot guideline helps ensure that fire safety systems operate effectively and reliably, contributing to the overall safety objectives that fire alarm systems are designed to achieve.