I have a house that is a pre-fab, the main feeds were ran after the house was put in place and go into j-boxes going to the different circuits. The feeds ( 10-15 of them ) are bundled together using zip-ties and are layed on top of the foundation wall and run the length and width of the house. I have read about the "cabling effect" where NM 14,12 or 10 awg zip-tied together over long distances can sustain a dramatic loss in the amp rating for the circuits involved. Has anybody else heard of this and if so what can you do about it?
Thanks for any posts!
