This Amprobe wiring inspector is a rugged circuit tester designed to test whether a buildings wiring is in compliance with electrical code in seconds, especially voltage drop under load. Without scrolling or switching screens, you can quickly identify issues with splices, connections and conductor quality, crucial to safety and performance of the electrical system. The flashing screen on this circuit tester will clearly indicate incorrect wiring or failures and it wont trip circuit breakers or blow fuses during the test.