Hoshizaki RM-10 Instruction Manual page 14

The power cord has a ground prong.
Do not under any circumstance cut
or remove the ground prong from
the cord. Removal of ground prong
invalidates product warranty.
NEVER USE AN ADAPTER PLUG!
Because of potential safety hazards under certain conditions, we strongly
recommend against the use of an adapter plug.
Do not plug in the electrical cord
of the refrigerator to an electrical
outlet that is used by other
appliances.
14
ELECTRICAL INSTALLATION
WARNING
Ground prong
Do not use extension cords. The
compressor might burn out.