In plans for special-agent fire extinguishing systems, which details must be documented?

• A. Expellant gas type and storage container size
• B. Manufacturer and model
• C. Discharge duration and frequency
• D. Power supply and cable gauge

Answer: (A)

In plans for special-agent extinguishing systems, the essential detail documented is how the agent is released and how much agent is available. Specifically, the plans must indicate the expellant gas type used to drive the agent out of the storage cylinders and the size (capacity) of those storage containers. This information is critical because it directly determines how much agent will be discharged, how quickly it will be released, and whether the system will provide the intended protection for the protected space. Knowing the expellant gas ensures compatibility and safety considerations for actuation, while knowing the container size establishes the total agent quantity and helps verify that the system meets design requirements for the space.

Other items—such as manufacturer and model—may be relevant to procurement or future servicing, but they are not the primary plan detail needed to verify the performance and feasibility of the extinguishing action. Discharge duration and frequency can be design details, but the plan set focuses on the actual release mechanism and capacity. Power supply and cable gauge pertain to electrical components and are not the core information required to validate the special-agent release system on the plans.