Miller Arc Stud Welding Fundamentals Handbuch - Seite 11

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2-11. Selecting Cable Length and Size

Weld cable length and size are very important. A power source is often penalized by the use of too small a cable or too
long a cable system. The following chart will serve as a guide to selecting cable size and lengths in relation to the stud
diameter and approximate amperage.
A voltage drop will occur between the power source terminals and the stud gun due to cable resistance. Cables must
be of sufficient size to allow the necessary voltage to be available at the stud gun. Avoid more than a 5 volts drop in the
cables.
Cable connections and splices are another area to consider. Make the best possible electrical and mechanical con-
nections. Use commercially available welding cable connectors, making certain the right size is used for cable size
being used. Since the time cycle is so short, any arcing in a poor connection will prevent satisfactory stud weld-
ing.
2100
1"
1900
1800
7/8"
1700
1600
1500
3/4"
1400
1300
1200
5/8"
1100
1000
900
1/2"
800
700
7/16"
No. 1
600
3/8"
Cable Size
500
5/16"
Area
400
1/4"
300
4/0
2/0
50
100
150
2-4/0
200
250
TOTAL CABLE LENGTH (FT)
(Ground And Electrode)
Use multiple 4/0 cables or
500 mcm cable or larger.
300
350
400
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