Powermatic PM2020 manual Electrical connections, Single Phase Operation, Three Phase Operation

4.When all holes have been bored, place the 2x6’s on edge in the outer ledges of the Lathe.

5.Cut the dowel rods to length with a miter saw or hand saw, so that after insertion the rods will be flush with the back of the rear 2x6.

6.Insert the dowel rods through the holes in the rear 2x6, as shown in Figure 12.

7.A strip of wood can be screwed to the rear 2x6 to cover the dowel holes and prevent the dowels from working out.

Figure 12

8.0Electrical connections

Electrical connections must be made by a qualified electrician in compliance with all relevant codes. This machine must be properly grounded to help prevent electrical shock and possible fatal injury.

This machine must be grounded. In the event of a malfunction or breakdown, grounding provides a path of least resistance for electric current to reduce the risk of electric shock.

Improper connection of the equipment-grounding conductor can result in a risk of electric shock. The conductor, with insulation having an outer surface that is green with or without yellow stripes, is the equipment-grounding conductor. If repair or replacement of the electric cord or plug is necessary, do not connect the equipment- grounding conductor to a live terminal.

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.

The Lathe will operate on single phase or three phase, 230 volt power supply. Make sure the characteristics of your power supply match the specifications on the motor plate of the Lathe. It is recommended that the lathe be connected to a 20 Amp circuit with circuit breaker or time delay fuse.

Local codes take precedence over recommend- dations.

8.1Single Phase Operation

A three wire pigtail for use on 230 volt single phase power is attached to the inverter and may be “hard- wired” to the power source, or connected to a UL/CSA listed receptacle plug.

Connect the 230 volt supply to the black and white leads and ground the green lead.

If you are hard-wiring the Lathe to a panel, make sure a disconnect is available for the operator. During hard-wiring of the Lathe, make sure the fuses have been removed or the breakers have been tripped in the circuit to which the Lathe 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.

8.2Three Phase Operation

If three phase power is used, it will be necessary to replace the pigtail wire attached to the inverter with a 12/4 wire and connect the three hot leads to the inverter at R, S, T as shown in the wiring diagram in sect. 17.0. Always connect the ground lead.

8.3Extension cords

The use of extension cords is discouraged. Try to position machines within reach of the power source. If an extension cord becomes necessary, make sure the cord rating is suitable for the amperage listed on the machine’s motor plate. An undersized cord will cause a drop in line voltage resulting in loss of power and overheating.

Use the chart in Table 1 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.

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.

Table 1

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