Guidelines For Servicing Electrical Equipment - IBM System x3300 M4 Installation And Service Manual

Guidelines for servicing electrical equipment

Observe the following guidelines when servicing electrical equipment:
v Check the area for electrical hazards such as moist floors, nongrounded power
v Use only approved tools and test equipment. Some hand tools have handles that
v Regularly inspect and maintain your electrical hand tools for safe operational
v Do not touch the reflective surface of a dental mirror to a live electrical circuit.
v Some rubber floor mats contain small conductive fibers to decrease electrostatic
v Do not work alone under hazardous conditions or near equipment that has
v Locate the emergency power-off (EPO) switch, disconnecting switch, or electrical
v Disconnect all power before you perform a mechanical inspection, work near
v Before you work on the equipment, disconnect the power cord. If you cannot
v Never assume that power has been disconnected from a circuit. Check it to
v If you have to work on equipment that has exposed electrical circuits, observe
v Use extreme care when you measure high voltages.
v To ensure proper grounding of components such as power supplies, pumps,
v If an electrical accident occurs, use caution, turn off the power, and send another
extension cords, power surges, and missing safety grounds.
are covered with a soft material that does not provide insulation from live
electrical currents.
condition. Do not use worn or broken tools or testers.
The surface is conductive and can cause personal injury or equipment damage if
it touches a live electrical circuit.
discharge. Do not use this type of mat to protect yourself from electrical shock.
hazardous voltages.
outlet so that you can turn off the power quickly in the event of an electrical
accident.
power supplies, or remove or install main units.
disconnect the power cord, have the customer power-off the wall box that
supplies power to the equipment and lock the wall box in the off position.
make sure that it has been disconnected.
the following precautions:
– Make sure that another person who is familiar with the power-off controls is
near you and is available to turn off the power if necessary.
– When you are working with powered-on electrical equipment, use only one
hand. Keep the other hand in your pocket or behind your back to avoid
creating a complete circuit that could cause an electrical shock.
– When you use a tester, set the controls correctly and use the approved probe
leads and accessories for that tester.
– Stand on a suitable rubber mat to insulate you from grounds such as metal
floor strips and equipment frames.
blowers, fans, and motor generators, do not service these components outside of
their normal operating locations.
person to get medical aid.
xv
Safety