Abstract: An electric apparatus (10) according to the present invention comprises electrically separated first and second terminals (14, 13), a first contact (16) that is connected electrically to the first terminal (14) within a casing (11), a second contact (15) that is connected electrically to the second terminal (13) within the casing and an operating member (20) for moving the first and second contacts relative to one another. In the present invention, at least the first contact (16) comprises a first conductive layer (41) with a given thickness including a face that is engageable with the second contact, a second conductive layer (42) that is connected to the first terminal (14), and insulating fiber (43) that is interposed between the first and second layers so that the above-mentioned second contact is engaged in the closing contacts movement by the insulating fiber when it is exposed by wear of the first layer (41) due to opening and closing movements of above mentioned contacts.