What information must be included in fire pump system plans, according to NFPA 20?

The inclusion of the controller manufacturer and suction main size in fire pump system plans is essential as outlined in NFPA 20, which provides guidelines for the design and installation of fire pumps. The controller manufacturer is critical because the controller is a vital component that manages the pump's operations, ensuring it starts and stops appropriately under various conditions. Specifying the manufacturer aids in ensuring compatibility with other system components and facilitates maintenance and repair.

Equally important is the suction main size, as it directly affects the hydraulic performance of the fire pump system. Ensuring the correct size and specifications of the suction main is crucial for maintaining the required flow and pressure during operation, which are essential for effectively fighting fires. This information helps engineers and installers understand the system dynamics and comply with safety and performance standards.

In contrast, while considerations like pipe length, color, the type of fire extinguishing agent, and backup power sources may be relevant to broader project specifications or choices, they are not mandated in the same critical manner as the controller manufacturer and suction main size in the context of NFPA 20 requirements.