Managing cables

Use these guidelines when you cable servers or other devices that you install in a rack cabinet.

Always read the instructions that come with your server or optional device for detailed cable-management information.

Statement 8

DANGER

• Plug power cords from devices in the rack cabinet into electrical outlets that are located near the rack cabinet and are easily accessible.
• Each rack cabinet might have more than one power cord. Be sure to disconnect all power cords in the rack cabinet before servicing any device in the rack cabinet.
• Install an emergency-power-off switch if more than one power device (power distribution unit or uninterruptible power supply) is installed in the same rack cabinet.
• Connect all devices installed in a rack cabinet to power devices installed in the same rack cabinet. Do not plug a power cord from a device installed in one rack cabinet into a power device installed in a different rack cabinet.

• Do not run cables in front of or behind other devices that will prevent service access to those devices.
• Do not bend cables beyond the specified limits.
• Label all cables so that they are clearly distinguishable from each other.
• When you install devices that are mounted on slide rails, such as servers, observe the following precautions:
  • Run the cables neatly along equipment cable-management arms and secure the cables to the arms, using provided cable straps.
  • Leave enough extra cable so that you can fully extend the device without straining the cables.
  • Secure the cables so that you can retract the device without pinching or cutting the cables.
• When you install devices that are mounted on fixed rails, observe the following precautions:
  • Run the cables neatly along the posts or side rails in the rack cabinet out of the way of other installed devices.
  • Secure the cables with the provided cable straps.
• Make sure that the cables cannot be pinched or cut by the rack cabinet rear door or other devices.
• Run internal cables that connect devices in adjoining racks through the large openings in the rear of the rack cabinet.
• Run external cables through the bottom of the rack cabinet or through the cable-access opening in the top of the rack.