Gridi ndi netiweki yomwe imalumikiza mafakitale opanga magetsi ku mizere yamagetsi amphamvu kwambiri yomwe imanyamula magetsi mtunda wina kupita ku malo osinthira magetsi - "kutumiza". Malo osinthira magetsi akafika, malo osinthira magetsi amachepetsa magetsi kuti "agawidwe" ku mizere yamagetsi apakati kenako n’kupita ku mizere yamagetsi otsika. Pomaliza, transformer pa ndodo ya foni imaichepetsa kufika pamagetsi apakhomo a 120 volts. Onani chithunzi pansipa.

Gridi yonse ingaganizidwe kuti ili ndi magawo atatu akuluakulu: kupanga (zomera ndi ma transformer owonjezera), ma transformer (mizere ndi ma transformer omwe amagwira ntchito kuposa ma volts 100,000 - 100kv) ndi kugawa (mizere ndi ma transformer pansi pa 100kv). Mizere yotumizira imagwira ntchito pamagetsi okwera kwambiri 138,000 volts (138kv) mpaka 765,000 volts (765kv). Mizere yotumizira ingakhale yayitali kwambiri - kudutsa mizere ya boma komanso ngakhale mizere ya dziko.

Pa mizere yayitali, ma voltage apamwamba amagwiritsidwa ntchito bwino kwambiri. Mwachitsanzo, ngati magetsi awirikiza kawiri, magetsi amadulidwa pakati kuti mphamvu zomwezo ziperekedwe. Kutayika kwa magetsi a mzere kumakhala kofanana ndi sikweya ya magetsi, kotero "kutayika" kwa mizere yayitali kumadulidwa ndi gawo lachinayi ngati magetsi awirikiza kawiri. Mizere ya "Kugawa" imapezeka m'mizinda ndi madera ozungulira ndipo imafalikira ngati mtengo wozungulira. Kapangidwe kameneka kofanana ndi mtengo kamakula kuchokera ku substation, koma kuti zikhale zodalirika, nthawi zambiri kamakhala ndi kulumikizana kamodzi kosagwiritsidwa ntchito ku substation yapafupi. Kulumikizana kumeneku kumatha kuyatsidwa mwachangu pakagwa ngozi kuti dera la substation lithe kudyetsedwa ndi substation ina.