Does a separately detached building with more than two circuits require the feeder to that building to include a grounding electrode conductor.

[Rudyfurlan]

Being that the building is required to have a grounding electrode at the building disconnect means, can I run a tri-plex cable or PVC with no ground and bond the neutral to the new Grounding Electrode Conductor at the disconnect?

 

[texie]

No. See 250.32

 

[kwired]

What texie said.

exception can apply to an existing feeder, there are conditions that must be met to use the exception.

New feeder or branch circuit, must have separate grounded and grounding conductors in all cases, ever since about 2005 NEC IIRC

 

[petersonra]

Being that the building is required to have a grounding electrode at the building disconnect means, can I run a tri-plex cable or PVC with no ground and bond the neutral to the new Grounding Electrode Conductor at the disconnect?

Just because it has a grounding electrode conductor does not mean you can create a grounded conductor there. The GEC would be connected to the EGC at the second building, and you would likely need to run 5 wires to it (3 phases, egc, and grounded conductor - if it has a separate grounded conductor).