Which of the following is a requirement for legally installed fire alarm systems?

The requirement for legally installed fire alarm systems includes compliance with approved codes. This means that the installation must adhere to specific regulations and standards that have been established to ensure safety and functionality. These codes are often set by national, state, or local authorities and are designed to protect life and property by ensuring that fire alarm systems are reliable, effective, and safe for users.

When fire alarm systems are installed in compliance with these codes, they are assessed for their design, materials, installation methods, and overall operational effectiveness. This ensures that in the event of a fire, the system operates as intended, providing timely alerts to occupants and enabling an effective response to the emergency.

The other options involve practices that do not align with the legal and safety standards typically mandated for fire alarm installations. For example, allowing installation by volunteers can lead to unqualified installation, which may compromise safety. Using any available parts could result in substandard or incompatible components being utilized, which could also jeopardize the system’s performance. Lastly, choosing equipment solely based on cost could lead to skimping on quality and safety features that are essential for effective fire alarm systems.