(1) isheke eliqukethwe inetha lentambo lihlanganisa: inethi ngeke ishiye imfucumfucu yokwakha, inethi ayikwazi ukuqongelela izinto, umzimba wenethi awukwazi ukubonakala ukonakala nokuguga okukhulu, kanye nokuthi izongcoliswa amakhemikhali ne-asidi, i-alkali. ukushiswa kwentuthu nokushisela.

(2) uhlaka lokusekela akufanele lukhubazeke kakhulu futhi luguge, futhi ingxenye yokuxhuma ngeke ixegiswe.Izindawo zokuxhumanisa phakathi kwenethi nenetha naphakathi kwenethi nohlaka lokusekela nazo azivunyelwe ukuxegiselwa.Zonke izintambo kufanele ungagqoki kakhulu noma ukhubazeke.

(3) izinto eziwa enethini kufanele zihlanzwe njalo.Gcina inetha lihlanzekile.Futhi gwema inani elikhulu le-soldering noma ezinye izinhlansi eziwela enethini, futhi ugweme ukushisa okuphezulu noma umusi.Lapho umzimba wenetha ungcoliswa amakhemikhali noma intambo yenethi eshumekwe esihlabathini esimahhadla noma eminye imizimba yangaphandle engase idale ukuguga, kuyadingeka ukuyihlanza futhi yome ngokwemvelo ngemva kokugeza.

(4)inetha lezintambo ngeke lisetshenziswe lapho kudotshwa insimbi noma ngamathuluzi abukhali, ukuze kuvinjwe ukulimala kwentambo. egcinwe eshalofini ngamaqoqo, futhi akuvunyelwe ukunqwabelana ngokungahleliwe.Inqolobane iyadingeka ukuthi ibe ne-ventilating, shading, inhistration, umswakama-umswakama, ukuguguleka kwamakhemikhali nezinye izimo.Enqubeni yokugcina, kuyadingeka futhi ukwenza ukuhlolwa okuvamile komzimba wenethiwekhi, ukuthola izinkinga, ukwelashwa ngokushesha, ukuqinisekisa.