Caution: During installation or maintenance procedures, wear a grounding
wrist strap to avoid ESD damage to the electronics of the appliance. Use a
conductive wrist strap attached to a good earth ground or to the appliance. You
can attach it to the connector beside the ESD symbol on the back.
electrical safety precautions to protect yourself from harm and the appliance
- Be aware of the location of
the emergency power off (EPO) switch, so that you can quickly remove power to
the appliance if an electrical accident occurs.
- Remove all jewelry and
other metal objects that might come into contact with power sources or wires
before installing or repairing the appliance. When you touch both a live power
source or wire and ground, any metal objects can heat up rapidly and may cause
burns, set clothing on fire, or fuse the metal object to an exposed terminal.
- Use a regulating,
uninterruptible power supply (UPS) to protect the appliance from power surges
and voltage spikes, and to keep the appliance operating in case of power
- Never stack the appliance
on top of any other server or electronic equipment.
- All appliances are designed
to be installed on power systems that use TN earthing. Do not install your
device on a power system that uses either TT or IT earthing.
- Make sure that the
appliance has a direct physical connection to the earth during normal use. When
installing or repairing an appliance, always make sure that the ground circuit
is connected first and disconnected last.
- Make sure that a fuse or
circuit breaker no larger than 120 VAC, 15 A U.S. (240 VAC, 16 A international)
is used on all current-carrying conductors on the power system to which your
appliances are connected.
- Do not work alone when
working with high voltage components.
- Always disconnect the
appliance from power before removing or installing any component. When
disconnecting power, first shut down the appliance, and then unplug the power
cords of all the power supply units connected to the appliance. As long as the
power cord is plugged in, line voltages can be present in the power supply,
even when the power switch is OFF.
- Do not use mats designed to
decrease static electrical discharge as protection from electrical shock.
Instead, use rubber mats that have been specifically designed as electrical
- Make sure that the power
source can handle the appliance's maximum power consumption rating with no
danger of an overload. Always unplug any appliance before performing repairs or
- Do not overload the wiring
in your server cabinet or on your server room rack.
- During thunderstorms, or
anticipated thunderstorms, avoid performing any hardware repairs or upgrades
until the danger of lightning has passed.
- When you dispose of an old
appliance or any components, follow any local and national laws on disposal of
- To prevent possible
explosions, replace expired batteries with the same model or a
manufacturer-recommended substitute and follow the manufacturer’s instructions
for battery replacement.
- Never remove a power supply
cover or any sealed part that has the following label: