990–9860C–001

Connect Power Cables

  1. Connect the equipment grounding conductor to the grounding busbar in the I/O cabinet.

    Top View of the Connection Area in the I/O Cabinet

  2. Connect the input cables (L1, L2, L3, G) to the input busbars in the I/O cabinet.
  3. Only applicable to high impedance grounding systems:
    NOTE: For high impedance grounding systems, the installation must include a ground-fault detection circuitry.
    1. Open the narrow door in the right side.

      Front View of the I/O Cabinet

    2. Remove the jumper busbar.

      Front View of the I/O Cabinet

    3. Connect an external impedance between the “E” terminal and the equipment grounding bar according to NEC 2014 article 250.36.

      Front View of the I/O Cabinet

  4. Connect the battery cables to the battery+ and battery– terminals in the I/O cabinet.
  5. Connect the equipment grounding conductor to the grounding busbar in the maintenance bypass cabinet.

    Front View of the Maintenance Bypass Cabinet in Top Cable Entry Systems

    Front View of the Maintenance Bypass Cabinet in Bottom Cable Entry Systems

  6. Connect the bypass cables (L1, L2, L3, G) to the Maintenance Bypass busbars in the maintenance bypass cabinet.
  7. Connect the load cables (L1, L2, L3, G) to the Load busbars in the maintenance bypass cabinet.
  8. Connect cables from the bypass terminals in the I/O cabinet to the UPS AC Bypass terminals in the maintenance bypass cabinet.
  9. Connect cables from the output terminals in the I/O cabinet to the UPS Output terminals in the maintenance bypass cabinet.
  10. Restrain the cables as described in Restrain the Cables.

    Front View of the Maintenance Bypass Cabinet in a Top Cable Entry System

    Front View of the Maintenance Bypass Cabinet in a Bottom Cable Entry System

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