Wok bilong kamapim ol pawa kebol i bin go insait long planti step. Stat long ol namba wan 'bare wires' long leit 19 senseri i go inap long ol 'low-voltage kebol long stat bilong 20 senturi, na las tru i go long ol hai-voltage kebol long namel bilong 20 senseri, pawa kebol teknoloji i wok long kamapim ol nupela samting na i go het. Nau yet, wantaim ol nupela teknoloji bilong 'superconducting', wok painimaut na yusim ol 'superconducting power cable' i wok long kamap bikpela tru.
