Patent ID: 6765390
Filing Date: 2004-07-20
Classification: G01R

Abstract:
A tester for verifying the integrity of wiring insulation in an electrical circuit comprising:an alternating current voltage source having a first and second output terminal leads; a line lead wire connectable to a line conductor in said electrical circuit; a neutral lead wire connectable to a neutral conductor in said electrical circuit; a ground lead wire connectable to a ground conductor in said electrical circuit; a first switch connected to one of either the first or second voltage source output terminal leads and switchable between either said line lead wire or said neutral lead wire; a second switch connected to the other of either the first or second voltage source output terminal loads and switchable between either said neutral lead wire or said ground lead wire; an ammeter connected in series with and between said voltage source and either said first or second switch; wherein the alternating current voltage source is a step up transformer and wherein a first tester circuit comprises a secondary winding of the step up transformer, the ammeter and the first and second switches and said tester further includes a second tester circuit comprising a pulse generator, a primary winding of a step down transformer connected to the pulse generator and a secondary winding of the step down transformer connected between the neutral lead wire and the ground lead wire.