In order for a cable break to be easily and quickly found, you can make a portable tester that will help you find a damaged segment. To create such a portable tester, you will need to take 2 wires and attach it to the terminals of the cartridge. Then screw the light into the cartridge, and clean the free two ends. Then these two free ends you will have to put in the outlet, if the light is light up, it means that your socket is in good position. When using this tester, you need to monitor the fact no matter how to touch the hands of an exposed wire.