Izi nsinga zikoreshwa mugutanga amashanyarazi hamwe na sisitemu yo Kurinda Multiple Earthing (PME), aho Ihuriro rirengera Isi (PE) na Bidafite aho bibogamiye (N) - hamwe bizwi ku izina rya PEN - bihuza bitagira aho bibogamiye-nisi hamwe nisi nyayo ahantu henshi. kugabanya ibyago byo guhitanwa n amashanyarazi mugihe habaye Ikaramu yamenetse.