Jet Tools M-1791309, 720HD operating instructions Extension cords, Feet 12 to 15 to 21 to

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. Use only three wire extension cords that have three-prong grounding plugs and three-pole receptacles that accept the tool’s plug.

The Mortiser is factory wired for 230 volt. You may either install a plug or “hard-wire” the machine directly to a control panel.

If you are connecting a plug, use a proper UL/CSA listed grounding plug suitable for 230 volt operation, similar to that shown in Figure 4.

The Mortiser with a 230 volt plug should only be connected to an outlet having the same configuration. No adapter is available or should be used with the 230 volt plug.

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

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 undersized cord will cause a drop in line voltage resulting in loss of power and overheating.

Use the chart in Figure 5 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.

Figure 4

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 5

10