Izi nsinga zikoreshwa mugutanga amashanyarazi hamwe na sisitemu yo Kurinda Multiple Earthing (PME), aho Isi ikingira (PE) hamwe na Bidafite aho bibogamiye (N) - hamwe bizwi nka PEN - ihuza ibidafite aho bibogamiye-nisi hamwe nisi nyayo ahantu henshi ahantu henshi. kugabanya ibyago byo guhitanwa n amashanyarazi mugihe habaye Ikaramu yamenetse.