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B-8 Dell PowerVault 530F SAN Appliance User’s Guide
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Systems are especially sensitive to variations in voltage supplied by the AC power
source. Overvoltage, undervoltage, and transients (or spikes) can erase data from
memory or even cause components to fail. To protect against these types of prob-
lems, power cables should always be properly grounded and one or both of the
following methods should be used:
Use one of the power protection devices described in "Power Protection Devices"
found later in this chapter.
Place the system on a dedicated power circuit (rather than sharing a circuit with
other heavy electrical equipment). In general, do not allow the system to share a
circuit with any of the following:
Copier machines
Air conditioners
Vacuum cleaners
Space heaters
Power tools
Teletype machines
Adding machines
Laser printers
Facsimile machines
Any other motorized equipment
Besides these appliances, the greatest threats to a system's supply of power are
surges or blackouts caused by electrical storms. Whenever possible, turn off the sys-
tem and any peripherals and unplug them from their electrical outlets during
thunderstorms.
If a blackout occurs—even a temporary one—while the system is turned on, turn off
the system immediately and disconnect it from its electrical outlet. Leaving the sys-
tem on may cause problems when the power is restored; all other appliances left on
in the area can create large voltage spikes that can damage the system.