Pedzisa mutsara unotevera: Mishumo yeSER inoshandiswa navanjiniya vemagetsi kuongorora kutadza kushanda kwemagetsi kukuru nokuduku. Mushure mokunge
Northeast blackout ya2003, North American Electric Reliability Corporation (NERC) yakatsanangura kuti magetsi emagetsi anofanirwa kuiswa nguva kusvika kumamirisekondi ari pedyo.