Isistimu enezendlalelo ezi-3 esetshenziswa kuntambo yesihlahla noma ikhebuli yesikhala, eyakhiwe, yahlolwa futhi yamakwa ngokuvumelana ne-ICEA S-121-733, okujwayelekile kwe-Tree Wire kanye ne-Messenger Supported Spacer Cable.Lolu hlelo olunezendlalelo ezi-3 luqukethe isivikelo somqhubi (ungqimba #1), olulandelwa isembozo sezendlalelo ezi-2 (izendlalelo #2 kanye no-#3).