Gouging And Earthing Cables; Connecting The Gouging Cable; Connecting The Earthing Cable; Use - Kemppi KempGouge ARC 800 Operating Manual

2.4

GOuGinG and earthinG Cables

2.4.1 Connecting the gouging cable

The gouging cable is connected to the power source with a 120 mm
cable is connected either to the positive (+) or negative (-) connector of the power source,
depending on the metal that is to be worked. The power source has one negative connector
and two positive connectors. For information on the connector locations, see Introduction.
Connect the gouging cable as follows:
Work metal
Steel
Cast iron
Non-iron metal
The gouging cable is rubber-insulated copper cable. The table below shows the typical load
capacities of the cables when the ambient temperature is 25 °C and the lead temperature is
85 °C.
Cable Duty cycle (ED)
100 %
50 mm²
285 A
70 mm²
355 A
95 mm²
430 A
120 mm²
500 A
Do not overload the gouging cables, as an overload may cause voltage loss and
NOTE!
overheating.

2.4.2 Connecting the earthing cable

The earthing cable is connected to the negative or positive connector in the power source,
depending on the connector used for the gouging cable (see Connecting the gouging cable).
The recommended cross-sections of the cable are listed in the table above.
Connect the earthing clamp directly to the work piece in such a way as to maximise the contact
surface of the clamp. The point of connection must be unpainted and free of corrosion.
3.

use

3.1

beFOre yOu start

Before you start carbon-arc gouging, do the following:
• Select a gouging carbon suitable for the work piece and attach it to the carbon holder.
• Connect the gouging cable to the positive or negative connector depending on the type
of metal to be worked. For more information, see Connecting the gouging cable.
• Adjust the gouging current to a suitable level. By default, the machine uses the
adjustment of the last time the machine was used. For more information on the gouging
current, see the table below.
• Start the power source and start gouging. For more information on the proper way of
performing carbon-arc gouging, see Gouging techniques.
The currents recommended for various gouging carbons.
Round carbon size
Current (A)
Voltage (V)
Gouging cable connection
Positive (+)
Negative (-)
60 % 35 % 20 %
316 A 371 A 458 A
403 A 482 A 602 A
498 A 606 A 765 A
587 A 721 A 917 A
5/32" 3/12" 1/4"
4.0 mm 5.0 mm 6.35 mm
80 – 150 110 – 200 170 – 330
38 – 41 39 – 42 43 – 46
DIX connector. The
2
Voltage loss / 10 m
0.35 V / 100 A
0.25 V / 100 A
0.18 V / 100 A
0.21 V / 100 A
5/16" 3/8"
8.0 mm 10.0 mm
230 – 450 300 – 550
44 – 48 46 – 50
EN
1/2"
13.0 mm
460 – 900
46 – 50
7