ins Copper Wire holding 133Eu/t ?

I hope this is posted in the right forum section.

I want to make a geothermal power plant with buildcraft in the nether, and I'm using 6 ic2 geothermal generators all next to each other like in picture A.
This works fine. I allready have one such setup running for days and it's sending 117-119Eu/t into the MFE. Pretty good and compact.

I dont know why but i tried using copper wires. And this is the result... (picture B)

Now i tried 2 generators and i saw they provided 40eu/t. ok maybe copper wiring can be "overclocked". Tried 80eu/t, still good.
But 140eu/t???... that should fry gold cables.

What am i missing here.

I feel stupid now :|. I've searched for hours on google and only found wiring guides on tekkit wiki and ic2 wiki that were beeing updated or outdated.

It didn't cross my mind to search these forums, sorry :(.

Thank you for the links.