This European Standard specifies requirements for the protective provisions relating to electrical safety in fixed installations associated with a.c. and/or d.c. traction systems and to any installations that can be endangered by the traction power supply system.It also applies to all aspects of fixed installations that are necessary to ensure electrical safety during maintenance work within electric traction systems.This European Standard applies to all new lines and to all major revisions to existing lines for the following electric traction systems:a) railways;b) guided mass transport systems such as1) tramways,2) elevated and underground railways,3) mou