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Installing a DC Power Cable

To install a replacement power cable for a DC power supply (see Figure 64):

  1. Locate a replacement power cable that meets the specifications defined in Table 30.
  2. Verify that a licensed electrician has attached a cable lug to the replacement power cable.
  3. Secure the power cable lug to the terminal studs, first with the flat washer, then with the nut. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each nut, (see Figure 64).
  4. Route the power cable along the cable restraint towards the left or right corner of the chassis. If needed, thread plastic cable ties, which you must provide, through the openings on the cable restraint to hold the power cables in place.
  5. Make sure the cable is not touching or in the way of any device components, and that it does not drape where people could trip on it.
  6. Replace the clear plastic cover over the terminal studs on the faceplate.
  7. Attach the power cable to the DC power source.
  8. Verify that the INPUT OK LED on the power supply is lit green.
  9. Switch the circuit breaker on the power supply to the ON position (|)

    Note: If more than one power supply is being installed, turn on all power supplies at the same time.

  10. Verify that the DC source power cabling is correct. Observe the status of the LEDs on the power supply faceplate. If the power cable is correctly installed and the power supply is functioning normally, the PWR OK, BRKR ON, and INPUT OK LEDs light green steadily.

Figure 64: Connecting Power Cables to the DC Power Supply

Image g004222.gif

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