Gun Polarity Connections; Installing Welding Gun; Electrical Service Requirements - MAC TOOLS MW50 Owner's Manual

3-3. Gun Polarity Connections

Shown As Shipped − Set For Electrode
Positive (DCEP) For Solid Steel Or
Aluminum Wires (GMAW Process).
Wire Drive Assembly Lead
To Positive (+) Output Terminal
Work Clamp Lead To
Negative (−) Output Terminal
GUN POLARITY
CHANGEOVER CONNECTIONS
Reverse Lead Connections − For Electrode
Negative (DCEN) For Flux Cored Wires
(FCAW Process). Drive Assembly
Becomes Negative

3-4. Installing Welding Gun

3-5. Electrical Service Requirements

Input Voltage
Input Amperes At Rated Output
Max Recommended Standard Fuse Or Circuit Breaker Rating In
Amperes
Min Input Conductor Size In AWG/Kcmil
Max Recommended Input Conductor Length In Feet (Meters)
Min Grounding Conductor Size In AWG/Kcmil
Reference: 1996 National Electrical Code (NEC).
OM-154 501 Page 8
1
2
S-144 449-D
1
5
3 4
4
3
2
1 Polarity Changeover Label
2 Wire Drive Assembly
3 Positive (+) Output Terminal
4 Negative (−) Output Terminal
Always read and follow wire man-
ufacturer's recommended polarity.
5 Circuit Breaker CB1 (see
Section 5-2).
Close door.
Tools Needed:
3/4, 11/16 in
Ref. ST-801 103-B
1 Wire Drive Assembly
2 Gun Securing Knob
3 Gun End
Loosen securing knob. Insert gun
end through opening until it bottoms
against drive assembly. Tighten
knob.
4 Gun Trigger Plug
Insert into receptacle, and tighten
threaded collar.
Close pressure assembly. Close
door.
Ref. ST-801 101-B
200 230
46 40
70 60
8
89 (27) 117 (36)
8 10
8
S-0092J