Ko te waea TW/THW he kaitakawaenga, he kaikawe parahi, he maru ranei, he mea weriweri ki te Polyvinylchloride (PVC).
Ko te waea TW te tikanga mo te waea werawera, wai-atete.
THHN THWN THWN-2 He pai te Waea mo te whakamahi hei taputapu miihini, iahiko whakahaere, waea taputapu ranei.Ko te THNN me te THWN kei a raatau te whakamahana PVC me nga koti nylon.Ko te whakamaarama PVC thermoplastic e hanga ana i te waea THHN me te waea THWN he tohu mura-muri, ko te koti nylon hei taapiri atu ki nga matū penei i te penehīni me te hinu.
Ko te waea XHHW e tu ana mo te "XLPE (whakawhiti-whakawhiti polyethylene) Te Wera-Atete Wai-Atete."Ko te taura XHHW he tohu mo tetahi mea whakamaarama motuhake, te whakatauranga pāmahana, me te ahuatanga o te whakamahi (e tika ana mo nga waahi maku) mo te waea hiko me te taura.