Ingcamango yeenqaba zothumelo, ii-conductor zothumelo zixhaswa ngamacandelo eenqaba zothumelo. Iintambo zamandla ombane aphezulu zisebenzisa “iinqaba zentsimbi,” ngoxa iingcingo zombane ophantsi, ezifana nezo zibonwa kwiindawo ezihlala abantu, zisebenzisa “iipali zomthi” okanye “iipali zekhonkrithi.” Ngokudibeneyo, zibizwa ngokuba "ziinqaba". Imigca yamandla ombane aphezulu ifuna umgama omkhulu wokhuseleko, ngoko ke kufuneka ibekwe kumphakamo omkhulu. Kuphela ziinqaba zentsimbi ezinesakhono sokuxhasa amashumi eetoni zemigca. Ipali enye ayinakuxhasa ubude okanye ubunzima obunjalo, ngoko ke iipali zisetyenziswa ngokubanzi kumanqanaba ombane asezantsi.

Kukho iindlela ezimbini ngokubanzi zokumisela inqanaba lombane:

1.Indlela yokuqaphela ipleyiti yepoli

Kwiinqaba zemigca yombane ophezulu, iipleyiti zeepali zidla ngokufakelwa, nto leyo ebonisa ngokucacileyo amanqanaba ombane ahlukeneyo afana ne-10kV, 20kV, 35kV, 110kV, 220kV, kunye ne-500kV. Nangona kunjalo, ngenxa yokuba sesichengeni sexesha elide emoyeni naselanga okanye kwimiba yokusingqongileyo, iipleyiti zepali zinokungacaci okanye kube nzima ukuzifumana, zifuna uqwalaselo olusondeleyo ukuze uzifunde ngokucacileyo.

2.Indlela yokuqaphela umtya we-Insulator

Ngokujonga inani leentambo ze-insulator, inqanaba lombane linokumiselwa ngokuqikelelwayo.

(1) iintambo ze-10kV kunye ne-20kV zihlala zisebenzisa iintambo ze-insulator ezi-2-3.

(2) Iintambo ezingama-35kV zisebenzisa iintambo ze-insulator ezi-3-4.

(3) Kwiintambo ze-110kV, iintambo ze-insulator ezi-7-8 zisetyenziswa.

(4) Kwiintambo ze-220kV, inani leentambo ze-insulator landa ukuya kwi-13-14.

(5) Ngowona mgangatho wombane uphezulu wama-500kV, inani leentambo ze-insulator liphezulu ukuya kuma-28-29.