4.3.13 - Low smoke-emitting cables
                    Normal p.v.c. 
                      insulation emits dense smoke and corrosive gases when burning. 
                      If cables are to be run in areas of public access, such 
                      as schools, supermarkets, hospitals, etc, the designer should 
                      consider the use of special cables such as those with thermo-setting 
                      or elastomeric insulation which do not cause such problems 
                      in the event of fire. This action is most likely to be necessary 
                      in areas expected to be crowded, along fire escape routes, 
                      and where equipment is likely to suffer damage due to corrosive 
                      fumes.