GE Industrial Solutions Power-Vac Metal Clad Switchgear; Addendums - Manual (Page 8)

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Tie bus connections across the shipping split
Steps 4 through 8 are the same for making the tie bus connections. The tie bus
compartment can be accessed from the rear of the switchgear by removing the rear bus
barrier of the tie bus compartment. Fig – A(1)-10 shows a typical bottom tie bus
compartment with the rear bus barrier removed.
Fig – A(1)-10
Typical Rear tie bus compartment with the rear bus barrier removed.
If the tie bus compartment has 2 inch x ¼ inch aux bus running between stacks, inter-unit
bus supports are not required and will not be provided.