Lincoln Electric POWER FEED 25M NNS Operator's Manual page 12

POWER FEED™ 25M NNS
WELD CABLE SIZE
Table A.1 located below are 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 cable drop.
COAXIAL WELD CABLE
(See Table A.2)
Coaxial welding cables are specially designed welding cables for pulse welding or
STT™ welding. Coaxial weld cables feature low inductance, allowing fast changes
in the weld current. Regular cables have a higher inductance which may distort the
pulse or STT™ wave shape. Inductance becomes more severe as the weld cables
become longer.
Coaxial cables work best for high performance waveforms and when:
• long cables are present.
• the cables are housed in a metal tray.
A coaxial weld cable is constructed with multiple small leads wrapped around one
large lead. The large inner lead connects to the electrode stud on the power source
and the electrode connection on the wire feeder. The small leads combine together
to form the work lead, one end attached to the power source and the other end to
the work piece. See Figure A.5
RECOMMENDED CABLE SIzES (RUBBER COVERED COPPER - RATED 75°C)**
AMPERES
250
300
350
RECOMMENDED CABLE SIzES (RUBBER COVERED COPPER - RATED 167°F or 75°C)**
AMPERES PERCENT
DUTY
CYCLE
200 60
200 100
225 20
225 40 & 30
250 30
250 40
250 60
250 100
300 60
325 100
350 60
400 60
400 100
500 60
** Tabled values are for operation at ambient temperatures of 104°F(40°C) and below. Applications above 104°F(40°C) may require cables
larger than recommended, or cables rated higher than 167°F(75°C).
DUTY
0 to 25Ft.
(0 to7.6M)
CYCLE
100%
1
1
60%
1/0
60%
CABLE SIZES FOR COMBINED LENGTHS OF ELECTRODE AND WORK CABLES
0 to 50Ft.
50 to 100Ft.
(0 to15M) (15 to 30M)
2
2
4 or 5
3
3
2
1
1
1
2/0
1/0
2/0
3/0
2/0
To install:
1. Turn the input power off at the welding power source.
2. Connect one end of the center lead to the power source electrode
connection, and the other end to the wire feeder electrode connec-
tion.
3. Connect the outer lead bundle to the power source work connection,
and the other end to the work piece. Minimize the length of any work
lead extension for best results.
4. Insulate all connections.
W W o o r r k k
Power Source Power Source
W W ork ork Electrode Electrode
Coaxial Weld Cable Coaxial W
TABLE A.2
COAXIAL CABLE LENGTH
25 to 50Ft.
50 to 75 Ft.
(7.6 to 15.2M)
(15.2 to 22.9M)
1
1
1/0
TABLE A.1
100 to 150 Ft.
(30 to 46M)
2 2
2 2
3
2
3 2
3 2
2 1
1 1
1 1
1
1
2/0
2/0
1/0 2/0
2/0 2/0
3/0 3/0
2/0 3/0
A 4
INSTALLATION
FIGURE A.5
W W o o r r k k
E E l l e e c c tr tro o d d e e
eld Cable
Electrode Electrode
Wire Feeder Wire Feeder
W W ork ork
75 to 100 Ft.
(22.9 to 30.5M)
1
1
1/0
1
--
--
150 to 200 Ft. 200 to 250 Ft.
(46 to 61M) (61 to 76M)
1
1
1
1
1
1
1
1
1/0
2/0
2/0
3/0
3/0
3/0
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