NEC Express 320Lc-R - Manual (Page 21)

Before Using 1-9
Use of Power Supply and Power Cord
WARNING
Do not handle a power plug with a wet hand.
Do not plug/unplug a power cord with a wet hand. There is a risk of an electric
shock.
Do not connect the ground wire to a gas pipe.
Never connect the ground wire to a gas pipe. There is a risk of a gas explosion.
CAUTION
Do not plug the cord in a nonconforming outlet.
Use a wall outlet with specified voltage and power type. There is a risk of a fire
or current leakage.
Avoid installing the equipment where you may need an extension cord. If the
cord that does not meet the power specifications, there is a risk of overheating
that could lead to a fire.
Do not plug too many cords in a single outlet.
If the rated current is exceeded, there is a risk of overheating that could lead to
a fire.
Do not plug the cord insecurely.
Insert the plug firmly into an outlet. There is a risk of heat or fire due to poor
contact. If dust settles on the slots and it absorbs moisture, there is also a risk
of heat or fire.