How armours /sheaths grounded?

1.	How armours /sheaths grounded?
Answer» 1 core cables -- sheaths/shields/armours grounded at one end only, other end insulated to prevent the circulating current through sheaths. 3 core cables -- grounded at both ends but not including core balance CT’s, since even small induced current causes 50N operation.

Answer»

1 core cables -- sheaths/shields/armours grounded at one end only, other end insulated to prevent the circulating current through sheaths.

3 core cables -- grounded at both ends but not including core balance CT’s, since even small induced current causes 50N operation.

Discussion