Chapter 3. Managing Cables - Lenovo 9308-4PX Installation Manual

42u enterprise primary/expansion rack
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Chapter 3. Managing cables

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.
Use the following general guidelines when you cable servers or other devices that you install in a rack
cabinet.
• Do not run cables in front of or behind other devices that will prevent service access to those devices.
• Do not bend a fiber-optic cable beyond its limited specifications.
• Label all cables so that they are clearly distinguishable from each other.
• When installing devices mounted on slide rails, such as servers:
– 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 the device can fully extend without straining the cables.
– Secure the cables so that the device can retract without pinching or cutting the cables.
• When installing devices mounted on fixed rails:
– 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 rack cabinets through the large openings provided in
the rear of the rack cabinet.
• Run external cables through the holes in the bottom of the rack cabinet or through the removable section
in the top of the rack cabinet.
© Copyright Lenovo 2001, 2010
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