System Ground in a 4 conductor Cable

[powerplay]

I was under the impression that the System Ground (Canadian Reference) for an Transformer Neutral XO was required to be outside of an Cable or Metal Pipe due to a choking inductive effect from an fault current?

In an installation of an 600 volt Delta Panel, the 4th Insulated conductor was taped green and split bolted securely to the Ground for the 120/208 volt transformer. It seemed practical to run it that way for esthetics, and since in Canada the System Ground needs only be #6awg copper, the larger 250mcm copper conductor incorporated into the cable was a good idea...?

 

[powerplay]

I was under the impression that the System Ground (Canadian Reference) for an Transformer Neutral XO was required to be outside of an Cable or Metal Pipe due to a choking inductive effect from an fault current?

In an installation of an 600 volt Delta Panel, the 4th Insulated conductor was taped green and split bolted securely to the Ground for the 120/208 volt transformer. It seemed practical to run it that way for esthetics, and since in Canada the System Ground needs only be #6awg copper, the larger 250mcm copper conductor incorporated into the cable was a good idea...?

To reword the question... Are there issues with using one of the Wires in a 4 Conductor cable as the System Ground for an Transformer's XO/Neutral? It has been 16 years since school, but I recall mention of Alternating Current's magnetic field collapsing when alternating direction creating induction in the metal sleeve surrounding it limiting current to prevent a fault from tripping an Breaker feeding an source of power like an Transformer? (I realize the neutral does complete the circuit in an panel installation.)