Delta 17-959L, Instruction Manual, Page: 7 / 60

3. 240 VOLT SINGLE PHASE OPERATION
The motor supplied with your machine is a dual voltage,
120/240 volt motor. It is shipped ready-to-run for 120
volt operation. However, it can be converted for 240 volt
operation.
A qualified electrician should do the conversion, or the
machine can be taken to an Authorized DELTA Service
Center. When completed, the machine must conform to the
National Electric Code and all local codes and ordinances.
The machine is converted by re-wiring the motor for 240
volts, installing a 240 volt plug on the power supply cord
and replacing the switch with one that is rated for 240 volt
operation.
Be sure the 240 volt plug is only used in an outlet having the same
configuration as the plug illustrated in Fig. C. No adapter should
be used with the 240 volt plug.
7
EXTENSION CORDS
Use proper extension cords. Make sure your extension cord is in good condition and is a 3-wire extension cord
which has a 3-prong grounding type plug and matching receptacle which will accept the machine’s plug. When using an extension
cord, be sure to use one heavy enough to carry the current of the machine. An undersized cord will cause a drop in line voltage,
resulting in loss of power and overheating. Fig. D-1 or D-2, shows the correct gauge to use depending on the cord length. If in doubt,
use the next heavier gauge. The smaller the gauge number, the heavier the cord.
Fig. D-1 Fig. D-2
Fig. C
GROUNDED OUTLET BOX
CURRENT
CARRYING
PRONGS
GROUNDING BLADE
IS LONGEST OF THE 3 BLADES
In all cases, make certain that the receptacle in question is properly grounded. If you are not sure, have a
qualified electrician check the receptacle.
FOREWORD
DELTA Model 17-959L is a 17" floor model drill press. This heavy-duty machine has a 3/4 HP, 120/240V induction motor,
5/8" capacity chuck and key, cast iron table, rack and pinion elevation mechanism, and external depth stop. The 17-959L
has a tilting table for angle drilling. Side edges and parallel slots are provided for fast workpiece clamping.
FUNCTIONAL DESCRIPTION
NOTICE: The photo on the manual cover illustrates the current production model. All other illustrations contained in
the manual are representative only and may not depict the actual color, labeling, or accessories, and are intended to
illustrate technique only.
MINIMUM GAUGE EXTENSION CORD
RECOMMENDED SIZES FOR USE WITH STATIONARY ELECTRIC MACHINES
Ampere
rating Volts
Total
length of
cord in
feet
Gauge of
extension cord
0-6 120 up to 25 18 AWG
0-6 120 25-50 16 AWG
0-6 120 50-100 16 AWG
0-6 120 100-150 14 AWG
6-10 120 up to 25 18 AWG
6-10 120 25-50 16 AWG
6-10 120 50-100 14 AWG
6-10 120 100-150 12 AWG
10-12 120 up to 25 16 AWG
10-12 120 25-50 16 AWG
10-12 120 50-100 14 AWG
10-12 120 100-150 12 AWG
12-16 120 up to 25 14 AWG
12-16 120 25-50 12 AWG
12-16 120
GREATER THAN 50 FEET NOT RECOMMENDED
MINIMUM GAUGE EXTENSION CORD
RECOMMENDED SIZES FOR USE WITH STATIONARY ELECTRIC MACHINES
Ampere
rating Volts
Total
length of
cord in
feet
Gauge of
extension cord
0-6 240 up to 50 18 AWG
0-6 240 50-100 16 AWG
0-6 240 100-200 16 AWG
0-6 240 200-300 14 AWG
6-10 240 up to 50 18 AWG
6-10 240 50-100 16 AWG
6-10 240 100-200 14 AWG
6-10 240 200-300 12 AWG
10-12 240 up to 50 16 AWG
10-12 240 50-100 16 AWG
10-12 240 100-200 14 AWG
10-12 240 200-300 12 AWG
12-16 240 up to 50 14 AWG
12-16 240 50-100 12 AWG
12-16 240
GREATER THAN 50 FEET NOT RECOMMENDED