What is the general practice of gro 3

One end.

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Ohm's law
Not just a good idea;
It's the LAW!

Agreed; one end ONLY so as to preclude circulating currents.

This thread ONLY to be used going forward; I have asked for your double post in EP&T&D forum be deleted, as double posting is forbidden.

CR

"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]

In HV substations, control cable sheaths are typically grounded at one end, known as single-point grounding. This minimizes circulating currents and provides a reference point for the control system. Double-point grounding may be used in specific cases, but adherence to manufacturer recommendations and system design considerations is crucial.