Welding with direct current may set up a magnetic field in the steel plate being welded. This magnetic field causes the arc to flutter and blow, creating difficulty in controlling the arc.
glossary
glossary
A group of thermal cutting processes that severs or removes metal by melting with the heat of an arc between an electrode and the work piece.
An electrical current which alternately travels in either direction in a Current conductor. In 60 cycles per second (60 Hz) AC, the frequency used in the U.S.A., the current direction reverses 120 times every second.
Electric current that reverses direction periodically, usually many times per second.
Unit of electrical rate of flow. Amperage is commonly referred to as the ?current? in an electrical circuit.