Nyob rau tam sim no, cov kab hluav taws xob overhead yog siv los thauj hluav taws xob mus ntev. Pa cables feem ntau yog aluminium conductor steel reinforced (ACSR). Txij xyoo 1990s, carbon fiber composite cores (aluminium conductor composite core) tau siv los ua cov core bar ntawm cables. ACCC muaj qhov zoo hauv qab no tshaj li cov neeg coj ua ib txwm muaj.
