IS 1678/IS 1445

IS: 1678-1960

16.   PCC Pole

• Class of Pole=Class1  Length of Pole=17 meter , Min Ultimate Transverse Load=3000kg                              
• Class of Pole=Class2  Length of Pole=17 meter , Min Ultimate Transverse Load=2300kg                            
• Class of Pole=Class3  Length of Pole=17 meter , Min Ultimate Transverse Load=1800kg                          
• Class of Pole=Class4  Length of Pole=17 meter , Min Ultimate Transverse Load=1400kg                              
• Class of Pole=Class5 Length of Pole=16 meter , Min Ultimate Transverse Load=1100kg                            
• Class of Pole=Class6 Length of Pole=12.5 meter , Min Ultimate Transverse Load=1000kg                           
• Class of Pole=Class7  Length of Pole=12 meter , Min Ultimate Transverse Load=800kg                              
• Class of Pole=Class8  Length of Pole=12 meter , Min Ultimate Transverse Load=700kg                            
• Class of Pole=Class9  Length of Pole=11 meter , Min Ultimate Transverse Load=450kg                                 
• Class of Pole=Class10  Length of Pole=09 meter , Min Ultimate Transverse Load=300kg                              
• Class of Pole=Class11 Length of Pole=7.5 meter , Min Ultimate Transverse Load=200kg                        

17.   PCC Pole Tolerance

• Tolerance: The tolerance of overall length of the poles shall be + 15 mm. The tolerance on cross-sectional dimensions shall be + 3 mm. The tolerance on cross-sectional dimensions shall be + 3 mm. The tolerance on uprightness of the pole shall be 0.5 per cent

18.   PCC Pole depth in Ground

• Length of Pole= 6m To 7.5 m       Min depth in ground= 1.2m                                                                                 
• Length of Pole= 8m To 9.0 m       Min depth in ground= 1.5m                                                                                      
• Length of Pole= 9.5m To 11 m     Min depth in ground= 1.8m                                                                                  
• Length of Pole= 11.5m To 13 m   Min depth in ground= 2.0m                                                                           
• Length of Pole= 13.5m To 14.5 m   Min depth in ground= 2.2m                                                                                       
• Length of Pole= 15m To 16.5 m       Min depth in ground= 2.3m                                                                                 
• Length of Pole= 17m                        Min depth in ground= 2.4m   

IS: 1445-1966

19.   Porcelain Insulator

• Overhead line insulators are divided into two types according to their construction.
• Type A- An insulator unit in which the length of the shortest puncture patch through solid insulating material is at least equal to half the length of the shortest flashover path through air outside the insulator.
• Type B- An insulator or an insulator unit in which the length of the shortest puncture patch through solid insulating material is less than half the length of the shortest flash over path through air outside the insulator