Robert, As per the electrical code the breakers are rated at 80% of their=20 rated value for a continuous load. That means that a 15 amp breaker is=20 only rated to carry a 12 amp continuous load and a 20 amp breaker is=20 only rated at 16 amps. Thanks, rich! On 2/16/2015 12:18 PM, Robert Dvoracek wrote: > If the wiring is 12awg copper, then 13 amps is not a problem. > Even 14awg will probably be fine. > If the breaker is tripping, then invest in a quality breaker. > I have seen inferior breakers trip under their rated load. > Some welders actually recommend a slow-blow fuse. > If a premium circuit breaker still trips, take it back and get a fuse hol= der instead. > > Cheers, > Robert > > Sent from my iPad > >>> On Mon, Feb 16, 2015, at 02:44 AM, John Chung wrote: >>> Here is the long story........ >>> I just got into welding. My welding box can draw up to 13 amps. So said >>> the fuse on the plug. The circuit breaker which is the welding box is >>> plugged into is rated for 16 amps. >>> My great concern is burning off the insulation for the electrical cable= s >>> in the wall itself. The current draw on the welding box can be high. Th= e >>> welding box can run up to 200amps *output current*. Hence my concern wi= th >>> all this testing. I live in a country that uses 240volts. >>> --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .