He really does, meangene.

And to be honest, I don't doubt you, either. Clearly, your old 15A circuit was not fully up to the task of delivering the needed current to your equipment - either due to age on the breaker itself, corrosion (which would have a significant impact even with a small deposit, since it will be a much poorer conductor of electricity than clean copper), or both. You might even say that your case is a good illustration of why having sufficient current available for your equipment really does help.