904.1.3 Additional safeguards.
FC § 904.1.3
If an area is protected by a fire extinguishing system which uses an extinguishing agent that will make the protected area hazardous by its discharge or thermal decomposition, suitable safeguards shall be provided to ensure prompt evacuation, to prevent entry into such atmospheres, and to provide means for prompt rescue of any trapped personnel. Such safeguards shall include establishment of a trained brigade, equipped with and qualified in the use of self-contained breathing apparatus with 30-minute minimum supply, for prompt search of the protected area. Exception: Self-contained breathing apparatus shall not be required for a clean agent fire extinguishing system installation if: 1. The installation is provided with an alarm system that is connected to an approved central station.
2.The protected area is provided with an approved fixed emergency forced ventilation system able to expel the extinguishing agent. Such emergency forced ventilation system shall have a capacity sufficient to effect at least twenty air changes per hour.
3.The protected area is of a size, design and/or occupied in such a manner that egress will not be impeded.
4.The protected area is not normally occupied by any individual requiring assistance in evacuation.
