Indololwane ye-EMT yakhiwe kusukela kumzila we-EMT oyinhloko ngokuvumelana nezicaciso zakamuva namazinga e-ANSI C80.3(UL797).
Ingaphakathi nengaphandle lezindololwane azinasici ngomthungo oshiselwe obushelelezi, futhi zimbozwe kahle futhi ngokulinganayo nge-zinc kusetshenziswa inqubo yokufaka idiphu eshisayo, ukuze ukuthintana kwensimbi kuya kwensimbi kanye nokuvikelwa kwe-galvanic ekugqwaleni kunikezwe, nangaphezulu. zezindololwane ezinoqweqwe olucacile lwangemuva kokugalela ukuze kunikeze ukuvikeleka okwengeziwe ekugqwaleni.

Izindololwane zikhiqizwa ngosayizi abajwayelekile bohwebo ukusuka ku-?“ ukuya ku-4”, idigri ehlanganisa 90 deg, 60 deg ,45 deg, 30 deg, 22.5deg,15deg noma ngokwesicelo sekhasimende.

Izindololwane zisetshenziselwa ukuxhuma ipayipi le-EMT ukushintsha indlela ye-EMT conduit.