Extension Cords; On-Off Switch Padlock - Powermatic DS20 Operating Instructions And Parts Manual

Three Phase Connections
The three phase Sander is factory wired for 230
volts. It is not supplied with a plug. You may
either install a UL/CSA-listed plug suitable for
230 volt operation, or "hard-wire" the Band Saw
directly to a service panel (make sure a
disconnect is available to the operator).
The three phase Band Saw may be converted to
460 volt operation. Re-connect the motor leads
according to the diagram inside the motor
junction box. (Similar diagrams may be found at
the back of this manual; however, diagrams on
the machine itself should take precedence.)
It is recommended that the three phase 230V
Sander be connected to a grounded and
dedicated, minimum 20 amp circuit with a 20
amp circuit breaker or time delay fuse. It is
recommended that the three phase 460V sander
be connected to a grounded and dedicated,
minimum 15 amp circuit with a 15 amp circuit
breaker or time delay fuse. Local codes take
precedence over recommendations.
If the Sander is to be hard-wired, make sure the
fuses have been removed or the breakers have
been tripped in the circuit to which the Sander
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.
Make sure the voltage of your power supply
matches the specifications on the motor plate of
the Disc Sander.

Extension Cords

If an extension cord 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.
The chart in Figure 4 shows the correct size
cord to use based on cord length and motor
plate amp rating. If in doubt, use the next
heavier gauge. The smaller the gauge number
the heavier the cord.

On-Off Switch Padlock

The sander is equipped with a push-button
switch that will accept a safety padlock (not
included). See Figure 5. To safeguard your
machine from unauthorized operation and
accidental starting by young children, the use of
a padlock is highly recommended. A padlock
(Stock No. 709012-A) is available from your
local authorized JET distributor or by calling
Walter Meier (Manufacturing) Inc., at the phone
number on the cover of this manual.
Recommended Gauges (AWG) of Extension Cords
Extension Cord Length *
25 50
Amps feet feet
< 5 16 16
5 to 8 16 16
8 to 12 14 14
12 to 15 12 12
15 to 20 10 10
21 to 30 10 NR
*based on limiting the line voltage drop to 5V at 150% of the
rated amperes.
NR: Not Recommended.
Figure 4
Figure 5
9
75 100 150 200
feet feet feet feet
16 14 12 12
14 12 10 NR
12 10 NR NR
10 10 NR NR
10 NR NR NR
NR NR NR NR