The entire fire control system shall be considered. Likewise,if a good water hydrant-hose system is offered, then small unitscould be acceptable at a specific location. An isolated plantordinarily would require a higher degree of protection than aplant served by a local fire department. The typeof extinguishing agent shall conform with the size and class ofpotential fire hazard. Carbon tetrachloride fire extinguishersare not acceptable in accordance with the National FireProtection Code.
Carbon tetrachloride is toxic and is harmful ifnot handled properly.
Generally, a minimum of one extinguisher having arating no less than 2A8B or 2A8BC where electrical installationsare present shall be provided on each floor or level in thestructure. At least one extinguisher shall be provided for each3,000 square feet of floor space. Where the floor space exceeds 3,000 square feet, and more thanone extinguisher is required, they shall be no more than 75 feetapart. If the area protected contains permanent electricalinstallations, the maximum distance between extinguishers shallbe no more than 50 feet. The 125-pound extinguisher can be a single unit ormade up of several smaller units, provided the total weight ofpowder meets the requirement.