Who must approve the complete drawings of the system installation?

The complete drawings of the system installation must be approved by the authority having jurisdiction (AHJ). The AHJ plays a crucial role in ensuring that all safety measures are adhered to, including compliance with local codes, ordinances, and standards, such as those established by NFPA 17 for dry chemical extinguishing systems.

This approval process is essential because it ensures that the installation meets not only the technical requirements outlined in applicable standards but also local safety regulations and community standards. The AHJ typically has the expertise and authority to evaluate the design and layout of the system, confirming that it will effectively protect the intended area against fire hazards.

Other entities, such as the local fire department or the manufacturer, may provide guidance or recommendations, but the definitive approval rests with the AHJ. The contractor executes the installation, but their input does not replace the need for formal approval from the AHJ, which is integral for maintaining public safety and ensuring that installations are performed correctly and effectively.