Magnesia yamagetsi yamagetsi, yotchedwa EGM, ufa amagwiritsidwa ntchito ngati kutchinjiriza kwamagetsi pazotenthetsa.Ma ufa a EGM ali ndi matenthedwe abwino otenthetsera koma amakhala ndi mphamvu yamagetsi yamagetsi pamatenthedwe okwera.Zigawozo zimadzazidwa pakati pa coil ndi sheath yakunja kuti ateteze ogwiritsa ntchito ku zoopsa za electrocution pomwe akusunga kutentha.