ama-insulators kocingo kagesi ama-intshi ama-5 asho ukuthi abavikeli bazogcina i-polywire, ucingo, i-polytape noma i-polyrope ezungeze u-5 intshi kude ne-T-post yensimbi, sicela ubheke izithombe ezilandelayo, lawa angama-insulators kocingo kagesi ama-5 intshi, kunezinhlobo ezi-2 ezisekelwe ekuqondisweni kokufakwa ku-T-post yensimbi.

Sisebenzisa ama-insulators kocingo kagesi ama-intshi ama-5, ngoba i-T-post yensimbi iyasebenza, i-polywire, ucingo, i-polytape noma i-polyrope izosondela kakhulu ku-T-post yensimbi uma sisebenzisa ama-insulators amafushane kagesi angaphansi kuka-5 intshi. insulator yocingo ka-5 intshi ingagcina i-polywire, ucingo, i-polytape noma i-polyrope ngeke ixhumane ne-T-post yensimbi lapho isilwane sithinta i-polywire, ucingo, i-polytape noma i-polyrope noma isimo sezulu esibi.