A short circuit plug is needed to measure cable faults in multi cables. The short circuit plug functions as a seal on the end of a multi cable. By connecting a loadtester (optionally available) on the other end of the multi cable, a cable can be measured. The LED light on the loadtester indicates that the cabling and grounding of the multi cable are done right. Convenient tools like this short circuit plug always come in handy both on the work floor and on the go.