Njengezintambo zamandla ekhondatha amathathu noma amane zilinganiselwa ku-600 volts, 90 deg.C. ezindaweni ezomile noma ezimanzi.
Kugunyazwe ngokukhethekile ukufakwa kumathreyi ekhebula ngokwe-Athikili 340 ngayinye ye-NEC.Izintambo zohlobo lwe-TC zivunyelwe ukusetshenziswa ku-Class I Division 2 ezindaweni eziyingozi zezimboni nge-NEC ngayinye.Amakhebuli angase afakwe emoyeni wamahhala, emijahweni noma lapho kungcwatshwa khona ngokuqondile, ezindaweni ezimanzi noma ezomile.Zonke izintambo uma zisetshenziswa ngokuhambisana ne-NEC, zihlangabezana nezidingo ze-OSHA.
I-conductor yekhebula ingaba yithusi noma i-aluminium nomaingxube ye-aluminium.Inombolo yama-cores ingaba ngu-1, 2, 3, kanye no-4 no-5 (i-4 ne-5 ngokuvamile izintambo ezine-voltage ephansi).
Izikhali zekhebula zingahlukaniswa zibe izikhali zensimbi zensimbi kanye nensimbi yensimbi yensimbi, kanye nezinto ezingezona uzibuthe ezisetshenziswa kukhebula le-AC eliwumgogodla owodwa.