MBM INSTALLATIONEaton 9395 Maintenance Bypass Module Installation and Operation Manual 164201719 Rev 3 www.eaton.com/powerquality 4-214.3.5 Standalone Power Wiring InstallationNOTE The MBM cabinet is shipped with a debris shield covering the ventilation grill on top of the unit. Donot remove the debris shield until installation is complete. However, remove the shield before using theMBM. Once the debris shield is removed, do not place objects on the ventilation grill.NOTE All power wiring to the MBM must be run in customer-supplied conduit.NOTE Remove the MBM cabinet top or bottom conduit landing plate to drill or punch conduit holes (seeFigure 4‐8 on page 4-10).NOTE Refer to the applicable Eaton 9395 Installation and Operation manual listed in paragraph 1.7 onpage 1-4 for UPS cabinet wiring information, and conduit and terminal locations.To install wiring:1. Verify the UPS system is turned off and all power sources are removed. Refer tothe applicable Eaton 9395 Installation and Operation manual listed in paragraph1.7 on page 1-4 for shutdown instructions.2. If not already open, unfasten the front door latch and swing the doors open (seeFigure 4‐1 on page 4-2).3. If not already removed, remove the doors. Remove the retaining screws locatedinside each door at the top and bottom hinge pivot points, then lift the door off.Retain the hardware for later use.4. If not already removed, remove the screws securing the top and bottom internalsafety shield panels and remove the panels to gain access to the MBMterminals. Retain the hardware for later use.5. Route the power cables through either the top or bottom of the cabinet to theMBM terminals. See Figure 4‐8 through Figure 4‐12 for wiring access informationand terminal locations.Top Access Wiring. Remove the top conduit plate from the top of the MBM.Identify all conduit requirements and mark their location. Drill and punch allconduit holes in the top conduit plate prior to mounting on the MBM. Install theconduit plate and install all conduit runs into the plate. Pull the wiring through theconduit into the wiring area.Bottom Access Wiring. Remove the bottom conduit plate from the inside bottomof the MBM. Identify all conduit requirements and mark their location. Drill andpunch all conduit holes in the bottom conduit plate prior to mounting on theMBM. Install the conduit plate and install all conduit runs into the plate. Pull thewiring through the conduit into the wiring area.6. Route the output and neutral (if required) cables from the UPS to the MBMmaintenance isolation breaker (MIS) input and neutral terminals. Refer to theapplicable Eaton 9395 Installation and Operation manual listed in paragraph 1.7on page 1-4 for UPS cabinet terminal locations and termination requirements.See Figure 4‐8 through Figure 4‐12 for wiring access information and terminallocations.7. Connect phase A, B, and C power wiring to the UPS output and MBM MIS inputterminals. Connect the Neutral (if required) to the UPS and MBM neutralterminals. See paragraph 3.2.2 on page 3-5 for wiring and terminationrequirements.