General Order 95
Section III
Requirements for All Lines
33.2 Ground or Earth as a Conductor
Ground or earth shall not be used as a normal return or circuit
conductor. In direct current supply systems or in single phase or polyphase
supply systems, a neutral or any other conductor shall be used under normal
use as a return or circuit conductor; however, the grounding of the neutral
or any other conductor is not permitted as a normal return or circuit conductor.
The neutral or any other conductor is permitted to be grounded only for the
purposes of stabilization and protection.