HellermannTyton ELCB Socket Polarity Tester

Very satisfied, it and works as it should. A must have for COC inspections and tests. Second unit acquired for the precise reason. Probably the best and safest way to test your infrastructure and functioning of circuit breakers. Yes there is a third one as well but a different make. Two indicating the same result, the third to affirm further steps/repairs/inspetion to be taken. If in doubt test.