Southbend South Bend 16 SPEED GEARHEAD LATHE SB1053 - Manual (Page 21)

For Machines Mfg. Since 3/11 16-Speed Gearhead Lathe
-19-
P R E P A R A T I O N
Electrocution or fire may
occur if machine is not
correctly grounded and
attached to the power
supply. Use a qualified
electrician to ensure a safe
power connection.
Grounding Requirements
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 for the Models SB1054F and SB1055F
on the previous page, these machines must be
hardwired to the power source, using a locking
switch (see Figure 12). 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 a qualified electrician or
service personnel.
Figure 12. Typical hardwire setup with a locking
disconnect switch.
Power Source
LOCKING
DISCONNECT SWITCH
Machine
Conduit
Ground Ground
Conduit
220V Operation
The power cord and plug specified under Circuit
Requirements section for the Model SB1053 on
the previous page has an equipment-grounding
wire and a grounding prong. The plug must only
be inserted into a matching receptacle (outlet)
that is properly installed and grounded in
accordance with all local codes and ordinances
(see Figure 11).
Figure 11. Typical NEMA L15-30 plug and receptacle.
Grounding Prong
is Hooked
Current Carrying Prongs
GROUNDED
L15-30 RECEPTACLE
L15-30
PLUG