Snap-On MM 140 SL Owners Manual

ELECTRICAL SUPPLY REQUIREMENTS FOR THE MM140SL

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 -

15 Amp

20 Amp

30 Amp

Wire size

14 Gauge

12 Gauge

10 Gauge

Do not rely on the circuit breaker built into the MM140SL to protect your wiring.

This circuit breaker protects the MM140SL 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 MM140SL 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.

MM140SL output will be limited also by low input voltage (less than 120 volts), long input cords and use of extension cords.

Snap-on Tools Corporation Kenosha, WI 53141-1410 1