Welding Power Source Input Power Connections - Miller Electric XMT 4-Rack Owner's Manual

4-3. Welding Power Source Input Power Connections

WARNING
ELECTRIC SHOCK can kill.
Do not touch live electrical parts.
Turn Off welding power source, and disconnect input power to rack before inspecting or installing.
Have only qualified persons install unit.
Installation must meet National Electrical Code and all other codes.
NOTE
Have only qualified persons make this instal-
lation.
1 Control Box
2 Access Door
Open access door with same number as
welding power source location.
3 Welding Power Source Input Power
Cord
Figure 4-3. Welding Power Source Input Power Connections
100 ft (30 m) Or Less
Welding 10 To 60%
Amperes Duty Cycle
100 4
150 3
200 3
250 2
300 1
350 1/0
400 1/0
500 2/0
600 3/0
700 4/0
800 4/0
900 2-2/0
1000 2-2/0
1250 2-3/0
1500 2-4/0
*Weld cable size (AWG) is based on either a 4 volts or less drop or a current density of at least 300 circular mils per ampere.
When installing conductors from the welding power source, torque the Power
circuit breaker terminals and grounding terminal to 40 in-lbs (4.5 N·m).
1
4 Strain Relief Connector
Insert input power cord through strain relief
into entry hole for opened access door.
5 Grounding Conductor – Green Or
Green With Yellow Stripe(s)
6 Input Conductors
7 Power Circuit Breaker Terminals
Table 4-1. Weld Cable Size*
Total Cable (Copper) Length In Weld Circuit Not Exceeding
150 ft
(45 m)
60 Thru 100%
Duty Cycle
4 4
3 2
2 1
1 1/0
1/0 2/0
2/0 3/0
2/0 3/0
3/0 4/0
4/0 2-2/0
2-2/0 2-3/0
2-2/0 2-3/0
2-3/0 2-4/0
2-3/0 2-4/0
2-4/0 3-3/0
3-3/0 3-4/0
7
6
4
3
8 Grounding Terminal
Install input conductors from welding power
source to Power circuit breaker.
Install grounding conductor to grounding
terminal.
Close and secure access door.
200 ft 250 ft 300 ft
(60 m) (70 m) (90 m)
10 Thru 100% Duty Cycle
3 2
1 1/0
1/0 2/0
2/0 3/0
3/0 4/0
4/0 2-2/0
4/0 2-2/0
2-2/0 2-3/0
2-3/0 2-4/0
2-4/0 3-3/0
2-4/0 3-4/0
3-3/0 3-4/0
3-3/0 4-3/0
4-3/0 4-4/0
4-4/0
swarn3.1* 2/93
2
5
8
Tools Needed:
ST-158 333 / ST-151 269-B
350 ft 400 ft
(105 m) (120 m)
1 1/0 1/0
2/0 3/0 3/0
3/0 4/0 4/0
4/0 2-2/0 2-2/0
2-2/0 2-3/0 2-3/0
2-3/0 2-3/0 2-4/0
2-3/0 2-4/0 2-4/0
2-4/0 3-3/0 3-3/0
3-3/0 3-4/0 3-4/0
3-4/0 3-4/0 4-4/0
3-4/0 4-4/0 4-4/0
4-4/0 4-4/0
4-4/0
OM-815 Page 7
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