³Ô¹Ïtv / ENGINEERING EXPLANATIONWorked example and model boundaryILLUSTRATIVE INPUTUniform hollow barrel; identical parallel connectionsDC drop = I × R; total heating = I² × RTwo times current gives four times DC lossFixed resistance assumption only; temperature rise and safe current are notcalculated.This example is a model explanation, not a quoted limit or an approval.Conceptual diagram, not to scale. Dimensions and examples are not manufacturing limits.