Lug Cable Replacement

Written By: Dozuki System (and 2 other contributors)
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Difficulty

Moderate

Steps

11

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Introduction

Overview

This guide demonstrates how to replace the power lug cables in an Open Rack.

Acronyms and Terms

* AC - Alternating Current

Additional Notes

Safety: To prevent injury or death, it is crucial to de-energize the Open Rack's bus bars.

    • De-energize the rack.

    • Disconnect the rack's AC and DC circuit from your facilities electrical tap box.

    • Verify that no voltage is present on the rack's DC power rails before proceeding with this procedure!

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  2. Make sure there is not live power on the bus bars before proceeding with this step. Locate the AC power cable. The AC power cable is located on the right side of the power shelf (relative to the rear of the cabinet).

    • Make sure there is not live power on the bus bars before proceeding with this step.

    • Locate the AC power cable.

    • The AC power cable is located on the right side of the power shelf (relative to the rear of the cabinet).

    • Squeeze the tabs on the power cable.

    • Pull the power cable away from the cabinet.

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  3. Make sure there is not live power on the bus bars before proceeding with this step. Unscrew six Phillips #2 screws from the bus bar protection covers. Remove the bus bar protection covers.

    • Make sure there is not live power on the bus bars before proceeding with this step.

    • Unscrew six Phillips #2 screws from the bus bar protection covers.

    • Remove the bus bar protection covers.

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  4. Go to the front of the Open Rack.

    • Go to the front of the Open Rack.

    • Disconnect and remove all power supply units located on the front of the rack.

    • This step further reduces potential of electrical shock risk.

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  5. Make sure there is not live power on the bus bars before proceeding with this step. Using a wrench or Phillips screwdriver, remove the two bolts from each lug cable connected to the Open Rack bus bars. There is a total of six lug cables and twelve bolts to remove.

    • Make sure there is not live power on the bus bars before proceeding with this step.

    • Using a wrench or Phillips screwdriver, remove the two bolts from each lug cable connected to the Open Rack bus bars.

    • There is a total of six lug cables and twelve bolts to remove.

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  6. Make sure there is not live power on the bus bars before proceeding with this step. Using a wrench of Phillips screwdriver, remove the bolts attaching the lug cables to the power shelf rails. There are twelve bolts total.

    • Make sure there is not live power on the bus bars before proceeding with this step.

    • Using a wrench of Phillips screwdriver, remove the bolts attaching the lug cables to the power shelf rails.

    • There are twelve bolts total.

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  7. Make sure there is not live power on the bus bars before proceeding with this step. Install the six new power lug cables onto the power shelf. Ensure that the positive and negative cables are installed in the following orientation:

    • Make sure there is not live power on the bus bars before proceeding with this step.

    • Install the six new power lug cables onto the power shelf.

    • Ensure that the positive and negative cables are installed in the following orientation:

    • Negative Lug Cables (two total): Center Power Rails

    • Positive Lug Cables (four total): Left-most and Right-Most Power Rails

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  8. Make sure there is not live power on the bus bars before proceeding with this step. Connect the power lug cables to the Open Rack bus bars. Use a wrench or Phillips screwdriver to install the twelve bolts.

    • Make sure there is not live power on the bus bars before proceeding with this step.

    • Connect the power lug cables to the Open Rack bus bars.

    • Use a wrench or Phillips screwdriver to install the twelve bolts.

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  9. Make sure there is not live power on the bus bars before proceeding with this step. Install the three bus bar covers back onto the Open Rack. Install the three bus bar covers back onto the Open Rack.

    • Make sure there is not live power on the bus bars before proceeding with this step.

    • Install the three bus bar covers back onto the Open Rack.

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  10. Install all of the power supply units that were previously removed. The power supply is seated correctly when the retention tab snaps upward.

    • Install all of the power supply units that were previously removed.

    • The power supply is seated correctly when the retention tab snaps upward.

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  11. Make sure there is not live power on the bus bars before proceeding with this step. Connect the AC power cable to power shelf. Connect the AC power cable to power shelf.

    • Make sure there is not live power on the bus bars before proceeding with this step.

    • Connect the AC power cable to power shelf.

    Edit
Conclusion

This work is licensed under a Creative Commons Attribution 4.0 International License.

Author

with 2 other contributors

Dozuki System

Member since: 09/24/2009

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