7
3. 240 VOLT SINGLE PHASE OPERATION
The motor supplied with your saw is a dual voltage,
120/240 volt motor. It is set at the factory at 120 volts. If
it is desired to operate your machine at 240 volts, single
phase, it is necessary to reconnect the motor leads in
the motor junction box by following instructions given on
the motor nameplate.
MAKE SURE MOTOR IS
DISCONNECTED FROM POWER SOURCE BEFORE
RECONNECTING MOTOR LEADS.
It is also necessary to replace the 120 volt plug, supplied
with the motor, with a UL/CSA listed plug suitable for
240 volts and the rated current of your machine as
illustrated in Fig. C. Contact your local Authorized Delta
Service Center or qualified electrician for proper
procedures to install the plug. The machine must comply
with all local and national electrical codes after the 240
volt plug is installed.
The machine with a 240 volt plug should only be
connected to an outlet having the same configuration as
the plug illustrated in Fig. C. No adapter is available or
should be used with the 240 Volt plug.
IN ALL CASES, MAKE CERTAIN THE
RECEPTACLE IN QUESTION IS PROPERLY GROUNDED. IF
YOU ARE NOT SURE HAVE A QUALIFIED ELECTRICIAN
CHECK THE RECEPTACLE.
4. Permanently connected machines:
If the machine is intended to be permanently connected,
the machine should be connected to a grounded metal
permanent wiring system, or to a system having an
equipment-grounding conductor.
Fig. C
GROUNDED OUTLET BOX
CURRENT
CARRYING
PRONGS
GROUNDING BLADE
IS LONGEST OF THE 3 BLADES
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
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
Summary of Contents for (Model 31-300)
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