Page 51 - CITS - Welder - Trade Theory

WELDER - CITS

Lesson 10&11 : Topic- Arc length-types-effects of arc length

Objectives
At the end of this lesson you shall be able to
• define and identify the different types of arc lengths
• explain the effects and uses of different arc lengths

Arc length - It is the straight distance between the electrode tip and the job surface when the arc is formed. There
are three

Types of arc length
1 Medium or normal arc length (Correct arc length)
2 Long arc length.
3 Short arc length.

1 Medium or Normal Arc length: The correct arc length or normal arc length is approximately equal to the
diameter of the core wire of the electrode.

2 Long arc length: If the distance between the tip of the electrode and the base metal is more than the diameter
of the core wire it is called a long arc

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