Two wiring problem calls today. First call - two out of the four zones not working. Tracked wire path with the 521 and it passed right over the trouble spot. Ground fault pinpointed two areas, first was where the wire was between two pipes and the wire was pinched. This area was fine so I continued onto the next area. I cut this taped up part out. The only connection that should be made are with water proof connections and not with electrical tape. Second call was for a rewire, I did not have my camera with me so this is phone pic.