7.1 Chapter 4 of the FSS Code requires
                           that extinguishers have a fire-extinguishing capability at least equivalent
                           to that of a 9 L fluid extinguisher having a rating of 2A on class
                           A fire which may be water or foam as required by the Administration.
                           This equivalence may be demonstrated by fire test ratings determined
                           according to an international, national or other recognized standardfootnote.
                           
                        
                        
                        
                      
                     
                     
                     
                        
                        
                         
                           7.2 The size and type of extinguishers should
                           be dependent upon the potential fire hazards in the protected spaces
                           while avoiding a multiplicity of types. Care should also be taken
                           to ensure that the quantity of extinguishing medium released in small
                           spaces does not endanger personnel.