Jet JPSG-618M1, Инструкция по эксплуатации и каталог запасных частей

Страница: 15 / 40

15
Check with a qualified electrician or service
personnel if the grounding instructions are not
completely understood, or if in doubt as to
whether the tool is properly grounded.
Repair or replace a damaged or worn cord
immediately.
Make sure the voltage of your power supply
matches the specifications on the motor plate of
the Surface Grinder. The machine should be
connected to a dedicated circuit.
Extension cords
The use of an extension cord is not
recommended for the Surface Grinder. But if
one is necessary, make sure the cord rating is
suitable for the amperage listed on the
machine’s motor plate. An undersize cord will
cause a drop in line voltage resulting in loss of
power and overheating.
Use the chart in Figure 12 as a general guide in
choosing the correct size cord. If in doubt, use
the next heavier gauge. The smaller the gauge
number, the heavier the cord.
230 Volt, Three Phase Operation
Th Surface Grinder is factory-wired for 230 volt,
but can be converted to 460 volt if so desired
(see “Converting From 230 Volt to 460 Volt”).
You may either install a plug or “hard-wire” the
Band Saw directly to a control panel.
If you are connecting a plug, use a proper UL
listed 3-pole, 4-wire grounding plug suitable for
230 volt operation.
If the Band Saw is to be hard-wired to a panel,
make sure a disconnect is available for the
operator. During hard-wiring of the Band Saw,
make sure the fuses have been removed or the
breakers have been tripped in the circuit to
which the Band Saw will be connected. Place a
warning placard on the fuse holder or circuit
breaker to prevent it being turned on while the
machine is being wired.
Converting from 230 Volt to 460 Volt
There are two motors on this machine
(Wheelhead Motor and Coolant Motor) that must
be rewired for 460 volt. Consult the wiring
diagram inside the electrical box of each motor.
Also, the transformer in the machine’s electrical
box must be switched to 460V operation.
If using a plug, install a proper UL listed plug
suitable for 460V operation.
Recommended Gauges (AWG) of Extension Cords
Extension Cord Length *
Amps
25
feet
50
feet
75
feet
100
feet 150
feet 200
feet
< 5 16 16 16 14 12 12
5 to 8 16 16 14 12 10 NR
8 to 12 14 14 12 10 NR NR
12 to 15 12 12 10 10 NR NR
15 to 20 10 10 10 NR NR NR
21 to 30 10 NR NR NR NR NR
*based on limiting the line voltage drop to 5V at 150% of the
rated amperes.
NR: Not Recommended.
Figure 12