T3 Innovation AC120 Arc Chaser Dual Mode TDR Cable Fault Locator Review
The T3 Innovation AC120 Arc Chaser is 
a serious piece of technology. This unit is equipped with Spread Spectrum Time Domain Reflectometry (SSTDR) which gives the AC120 an accuracy within 1% to a fault. The T3 AC120 Arc Chaser monitors intermittent opens, shorts and faults and can work on both energized and unenergized cables.