Modular units same grounding grid

[yukonjack_99674]

Have modular units being constructed and set in place. All are powered from a common MCC. All are metallicly joined with one in question, which has 2 short enclosed walkways and have electric heaters in them. Construction is of wood with a metal roof that ties into the metal siding of the building. The metal siding is bonded due to exterior lights. The question is; the feeders are MC Cables and their grounds (equip bonding jumpers) are landed to the neutral bar at the disconnect that services the building. Is this correct???
Also, all of the modular units share a common grounding grid so they are all tied together. This mod's ground (from the grid) is also landed on the neutral bar. is this ground loop?

 

[don_resqcapt19]

The question is; the feeders are MC Cables and their grounds (equip bonding jumpers) are landed to the neutral bar at the disconnect that services the building. Is this correct???

In this case it appears that there are conductive paths between the units, so you are not permitted to re-bond the grounded conductor at each unit. 250.32(B)(2)