Copper Line Tests: Difference between revisions

If you get a Copper line test error, try the test again with all equipment unplugged, and the NTE5 faceplate removed as the fault could be caused by local wiring or equipment.

 

 

Loop fault is a symmetric low DC resistance between A/B wires in the pair. Rectified loop fault is an asymmetric low DC resistance between A/B, as-if there's a diode shorting the fault.