Powermatic DS20 operating instructions Extension Cords, On-Off Switch Padlock

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 3 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 4. 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 *
Amps		25	50	75	100	150	200
		feet	feet	feet	feet	feet	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 3

Figure 4

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