A-4
INSTALLATION
LF-72
A-4
SAFETY PRECAUTION
ELECTRIC SHOCK can
kill.
• Only qualified personnel should
perform this installation.
• Turn off the input power to the power source
at the disconnect switch or fuse box before
working on this equipment. Turn off the input
power to any other equipment connected to
the welding system at the disconnect switch
or fuse box before working on this equipment.
• Do not touch electrically hot parts.
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** Tabled values are for operation at ambient temperatures of 40°C and below. Applications above 40°C
may require cables larger than recommended, or cables rated higher than 75°C.
Amperes
200
200
225
225
250
250
250
250
300
325
350
400
400
500
Percent
Duty
Cycle
60
100
20
40 & 30
30
40
60
100
60
100
60
60
100
60
200 to 250 Ft.
61 to 76 m
1/0
1/0
1/0
1/0
1/0
1/0
1/0
1/0
2/0
3/0
3/0
4/0
4/0
4/0
150 to 200 Ft.
48 to 61 m
1
1
1
1
1
1
1
1
1/0
2/0
2/0
3/0
3/0
3/0
100 to 150 Ft.
31 to 48 m
2
2
2
2
2
1
1
1
1
2/0
2/0
2/0
3/0
3/0
50 to 100Ft.
15 to 31 m
2
2
3
3
3
2
1
1
1
2/0
1/0
2/0
3/0
2/0
0 to 50 Ft.
0 to 15 m
2
2
4 or 5
3
3
2
1
1
1
2/0
1/0
2/0
3/0
2/0
RECOMMENDED CABLE SIZES (RUBBER COVERED COPPER - RATED 75°C)**
CABLE SIZES FOR COMBINED LENGTHS OF ELECTRODE AND WORK CABLES
WELD CABLE SIZES
Table A.1 has the copper cable sizes recommended
for different currents and duty cycles. Lengths
stipulated are the distance from the welder to work
and back to the welder again. Cable sizes are
increased for greater lengths primarily for the purpose
of minimizing voltage in the welding circuit.
TABLE A.1
