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For Machines Mfg. Since 3/11 Turn-Nado
®
Gearhead Lathes
-23-
PREPARATION
Grounding Requirements
This machine must be grounded! In the event
of certain types of malfunctions or breakdowns,
grounding provides a path of least resistance
for electric current in order to reduce the risk of
electric shock.
Improper connection of the equipment-grounding
wire can result in a risk of electric shock. The
wire with green insulation (with or without
yellow stripes) is the equipment-grounding
wire. If repair or replacement of the power cord
is necessary, do not connect the equipment-
grounding wire to a live (current carrying)
terminal.
Check with a qualified electrician or service
personnel if you do not understand these
grounding requirements, or if you are in doubt
about whether the machine is properly grounded.
If you ever notice that a cord is damaged or
worn, disconnect it from power, and immediately
replace it with a new one.
440V Operation
As specified in the Circuit Requirements
section on the previous page, these machines
must be hardwired to the power source, using a
locking switch (see Figure 10).
These machines must also be connected to a
grounded metal permanent wiring system; or to a
system with an equipment-grounding conductor.
Due to the complexity and high voltage involved,
this type of installation MUST be done by an
electrician or qualified service personnel.
Figure 10. Typical hardwire setup with a locking
disconnect switch.
Power Source
LOCKING
DISCONNECT SWITCH
Machine
Conduit
Ground Ground
Conduit
Electrocution or fire may
occur if machine is not
correctly grounded and
attached to the power
supply. Use an electrician or
qualified service personnel
to ensure a safe power
connection.