oric_dan:
Oh, I thought it was right, but some weeks maths doesn't work, everything
looks fuzzy, calculator looks like slide rule, LOL. Where's the decimal point?
100A / 5 = 20A
Pd = 20A * 20A * 0.0026ohms = 1.04W
Ok, You are right, I drink too much coffee lately. It is not my fault, once I learn some high school math teachers here are failed go Dutch after eating because no calculator. I tried to do "all the math" by heart and tried to teach my kids that ways as well. 