NEC N8800-155F User Manual page 21

Before Using 1-5
CAUTION
Do not use other than 3-prong plug outlet.
This equipment encloses a power cord with 3-prong plug that has the third pin
(an earth pin). This plug can be used only on the outlet for the 3-prong.
There is a risk of an electric shock if you use other type of outlet.
Do not use the enclosed power cord to other devices or purposes.
The enclosed power cord is designated to connect to this equipment and use
with the equipment. Never connect the cord to other devices or purposes.
There is a risk of a fire or electric shock.