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Safety Addendum 125
Reinstall all covers correctly before returning the machine to the customer.
Electrical Safety
CAUTION
Electrical current from power, telephone, and communication cables can be
hazardous. To avoid personal injury or equipment damage, disconnect the
attached power cords, telecommunication systems, networks, and modems
before you open the server covers, unless instructed otherwise in the
installation and configuration procedures.
Observe the following rules when working on electrical equipment.
Important
Use only approved tools and test equipment. Some hand tools have handles
covered with a soft material that does not insulate you when working with
live electrical currents.
Many customers have, near their equipment, rubber floor mats that contain
small conductive fibers to decrease electrostatic discharges. Do not use this
type of mat to protect yourself from electrical shock.
• Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If
an electrical accident occurs, you can then operate the switch or unplug the power cord quickly.
• Do not work alone under hazardous conditions or near equipment that has hazardous voltages.
• Disconnect all power before:
Performing a mechanical inspection
Working near power supplies
Removing or installing main units
• Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask
the customer to power-off the wall box that supplies power to the machine and to lock the wall
box in the off position.
• If you need to work on a machine that has exposed electrical circuits, observe the following
precautions:
Ensure that another person, familiar with the power-off controls, is near you.
Remember: Another person must be there to switch off the power, if necessary.
Use only one hand when working with powered-on electrical equipment; keep the other
hand in your pocket or behind your back.
Remember: There must be a complete circuit to cause electrical shock. By observing the
above rule, you may prevent a current from passing through your body.
When using testers, set the controls correctly and use the approved probe leads and
accessories for that tester.