Table of Contents
 1     Scope          
 2     References               
 3     Definitions 
        3.1     Terms defined elsewhere        
        3.2     Terms defined in this Recommendation            
 4     Abbreviations and acronyms             
 5     Reference configuration     
 6     Line performance for direct flashes
        6.1     Annual number of damages    
        6.2     Risk of damage             
        6.3     Tolerable risk 
 7     Collection area         
        7.1     Aerial cable     
        7.2     Buried cable   
        7.3     Structure connected to the cable         
 8     Protection factor    
 9     Protection factor of cables 
        9.1     Requirements for cable installation     
        9.2     Optical fibre cable        
        9.3     Cables with internal conductors            
10     Protective measures applied to the line      
       10.1     To bury an aerial cable              
       10.2     Guard-wire on buried cable   
       10.3     Overhead ground wire on aerial cable               
       10.4     Installation of SPDs along the line        
11     Protective measures applied to the line-structure interface              
       11.1     Tubular shield              
       11.2     Shielding by parallel conductors           
       11.3     Use of SPDs at structure entrance      
Annex A – Evaluation of the sheath breakdown current (Is)    
Annex B – Evaluation of the test current (It)    
Appendix I – Expected loss per damage (L)    
Appendix II – Rationale for the protective effect of guard-wires