Ul bụ ndebiri nke ụlọ ọrụ nchekwa nchekwa nke dị n'okpuru ebe a bụ ikike kachasị na United States na ụlọ ọrụ nzuzo nkeonwe na-etinye aka na ule na ụwa. Ọ bụ ọrụ dị iche iche, maka uru, nzukọ ọkachamara na-eduzi nyocha maka nchekwa ọha. Ọ na-eji ụzọ nyocha sayensị iji mụọ ma chọpụta ma ihe dị iche iche, ngwaọrụ, ngwaahịa, akụrụngwa, wdg. Ọ na-ekpebi, dere, na mbipụta ndị kwekọrọ n'ụkpụrụ ma na-enyere aka belata ma gbochie ihe egwu dị ndụ. Anyị ga-anakọta ozi gbasara mmebi ihe onwunwe ma na-eduzi nyocha nke eziokwu n'otu oge. Asambodo Ul bụ asambodo na-abụghị mmanye na United States. Ọ tumadi ule na-egosiputa arụmọrụ ngwaahịa nchekwa ngwaahịa. Usoro ọkwa ya anaghị agụnye EMC (ndapụta electromagnetic) njirimara nke ngwaahịa a.
ETL bụ akara nke Intertek, nke na-eduga na ụlọ ọrụ ọrụ nchekwa ụwa na ndị ọrụ na-ahụ maka njem na 1896. Ọ gbanwere ụlọ ọrụ nnwale ahụ "na 1904, nke ghọrọ taa, etl ma nwee ọmarịcha aha dị na United States na gburugburu ụwa. Ebe ọ bụ na nguzobe ya karịrị narị afọ gara aga, etl etolitewo na ndebanye aha dị iche iche ma depụta aha obodo ndị na-anwale ụlọ nyocha na nlekọta ahụike US (OSHA). Nyocha nyocha ụlọ nyocha-nrtt). N'otu oge, kansụl nke Canada-SCC na-amata na a asambodo asambodo a na-enweta na nzukọ nnwale dị iche iche na Canada (ị nwere ike ịbanye na weebụsaịtị OSHA: / /www.SHA.Gov maka ozi ndị ọzọ).
Ọ bụrụhaala na ekwentị eletriki ọ bụla, igwe elektrọ ma ọ bụ igwe elektrọcho, ọ na-egosi na ngwaahịa ahụ enwetala opekempe chọrọ ka anyị mata na United States ghọtara ụkpụrụ nchekwa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US na Canadian Ngwaahịa US. Ejirila Intertek nwale, NRTL nke mba ọzọ na-ahụta (nrtt), ma na-ekweta na ụkpụrụ mba dị mkpa; Ọ pụtakwara na ụlọ ọrụ mmepụta ahụ kwenyere nyocha siri ike iji hụ na nha nke ogo ngwaahịa, nke a ga-ererịrị ahịa ahịa US na Canadian. Ihe a na-ekesa ihe nkesa, ndị na-azụ ahịa na ndị na-azụ ahịa bụ na ha na-azụ ngwaahịa ndị a nwalere ma gbaara ha n'aka ndị ọzọ.
Isi
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Oge post: Novolu 30-2023
