Lincoln Electric IM10180 POWER FEED 25M NNS - Manual (Page 12)

A-4
INSTALLATION 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
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.
Elect r t rode
Work
Work
El ec t r ode El ec t r ode Wor k or k
El ec t r ode El ec t r ode
Wor k or k
Power Sour c e Power Sour c e
Coax i al W Coax i al Wel d Cabl e el d Cabl e
Wi r e Feeder Wi r e Feeder
** 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).
RECOMMENDED CABLE SIZES (RUBBER COVERED COPPER - RATED 167°F or 75°C)**
CABLE SIZES FOR COMBINED LENGTHS OF ELECTRODE AND WORK CABLES
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
0 to 50Ft.
(0 to15M)
2
2
4 or 5
3
3
2
1
1
1
2/0
1/0
2/0
3/0
2/0
50 to 100Ft.
(15 to 30M)
2
2
3
3
3
2
1
1
1
2/0
1/0
2/0
3/0
2/0
100 to 150 Ft.
(30 to 46M)
2
2
2
2
2
1
1
1
1
2/0
2/0
2/0
3/0
3/0
150 to 200 Ft.
(46 to 61M)
1
1
1
1
1
1
1
1
1/0
2/0
2/0
3/0
3/0
3/0
200 to 250 Ft.
(61 to 76M)
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
TABLE A.1
TABLE A.2
FIGURE A.5
RECOMMENDED CABLE SIZES (RUBBER COVERED COPPER - RATED 75°C)**
COAXIAL CABLE LENGTH
AMPERES
250
300
350
DUTY
CYCLE
100%
60%
60%
0 to 25Ft.
(0 to7.6M)
1
1
1/0
25 to 50Ft.
(7.6 to 15.2M)
1
1
1/0
50 to 75 Ft.
(15.2 to 22.9M)
1
1
--
75 to 100 Ft.
(22.9 to 30.5M)
1
1/0
--