NEC NF2300-SR412E User Manual page 73

(3) Connection of power plug
Insert the plug of the power cord to an AC outlet. Because the plug has an earth pin,
use an AC outlet with earth terminal for the connection as shown in the figure below.
While the disk array unit can accept the power of 100 - 240 VAC (50/60
Hz), the power cord coming with the disk array unit can only accept 100
– 120 VAC. Use 100 – 120 VAC (50/60 Hz) when the attached power
cord is used. Using power of different voltage may cause electric shock,
smoke, and/or fire to occur.
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