Delta 20-950 - Manual (Page 6)

6
FOREWORD
The Delta 20-950 drill press is a 20" drill press. This heavy-duty machine has a 1 HP, 120/240V induction motor, 5/8" capacity
chuck and key, cast iron table, rack and pinion elevation mechanism, and an external depth stop. The 20-950 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 labeling or accessories included. These are intended to illustrate
technique only.
GROUNDED OUTLET BOX
CURRENT
CARRYING
PRONGS
GROUNDING BLADE
IS LONGEST OF THE 3 BLADES
Fig. D-1 Fig. D-2
MINIMUM GAUGE EXTENSION CORD
RECOMMENDED SIZES FOR USE WITH STATIONARY ELECTRIC MACHINES
Ampere Total Length Gauge of
Rating Volts of Cord in Feet 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 Total Length Gauge of
Rating Volts of Cord in Feet 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 100 FEET NOT RECOMMENDED
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 (if necessary) 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.
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.
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. C