Systematics , Inc. 1025 Saunders Lane West Chester, PA. 19380
1
ELECTRICAL SUPPLY REQUIREMENTS FOR THE MP140
Ensure that there is a
115
volt single phase,
20
amp electrical supply within easy reach
of the unit. The input cable supplied is 20 feet long. A 50 foot cable is an optional extra. The
plug which is factory installed is suitable for use up to 120 amps of output. The plug must
be changed if the welder is used above 120 amps of output. Attach a suitable plug making
sure the green wire is attached to ground. Refer to boxes below with the WARNING and
NOTE headings for more information. All wiring should be performed by a qualified
electrician.
WARNING
To conform to the National Electrical Code, the power input plug must be
changed if this unit is to be operated on a 20 amp circuit or higher.
Never change fuses or circuit breakers to a higher value than the wires and
outlet are designed for.
Breaker size
-
Wire size
15 Amp
14 Gauge
20 Amp
12 Gauge
30 Amp
10 Gauge
Do not rely on the circuit breaker built into the MP140 to protect your wiring.
This circuit breaker protects the MP140 internal wiring only.
Do not use undersized extension cords. Follow the cord manufacturer's
recommendations as to current carrying capacities.
Make sure all electrical wiring is installed by a qualified electrician.
NOTE
The maximum output of the MP140 will be limited by the size (amp rating) of
the circuit used.
Operation on a 15 amp circuit (14 gauge wire) will limit maximum
output to 100 amps.
Operation on a 20 amp circuit (12 gauge wire) will limit maximum
output to 120 amps.
Operation on a 30 amp circuit (10 gauge wire) will result in maximum
output of 140 amps.
MP140 output will be limited also by low input voltage (less than 120 volts),
long input cords and use of extension cords.
