An arc lamp is a general term for a class of lamps that uses an electric arc or voltage arc to create light. You've seen the bright light given off by electric arc welding, and the idea of the electric arc is the principle behind an arc lamp.

Hertha Ayrton has written:

'The electric arc' -- subject(s): Electric arc

The 'arc' in arc welding is not an acronym but in turn is a reference to the electric arc that is being generated during the welding process.

How do you make a simple plazma arc using tungsten wire.

The proper ampere rating of a circuit breaker for an electric arc welder depends on the arc welder. Each is different. Look at the nameplate on the arc welder and choose the circuit breaker and wiring accordingly.