IBM 6000R Hardware Maintenance Manual - Page 209

Electrical safety, power cords, telecommunication systems, networks

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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 poweredon 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. Related service information 197

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Related service information
197
Electrical safety
CAUTION:
Electrical current from power, telephone, and communi-
cation 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 configura-
tion 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, dis-
connecting 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.