New IEEE Standard - Inactive-Withdrawn. Withdrawn Standard. Withdrawn Date: Oct 25, 1996. The most common sheath-bonding systems now in use, and the methods of calculating sheath voltages and currents, are described. The concern is particularly with three-phase systems operating at 60 kV and above, with the neutral grounded directly or through an impedance. Bonding methods and sheath voltage limiters are covered. Effects on parallel telephone and control cables are considered.