Kwa afọ atọ, ndị òtù National Fire Protection Association (NFPA) ga-enwe nzukọ iji nyochaa, gbanwee ma gbakwunye koodu eletriki eletrik ọhụrụ (NEC), ma ọ bụ NFPA 70, chọrọ iji kwalite nchekwa eletrik na ngwa ụlọ, azụmahịa na ụlọ ọrụ mmepụta ihe, nke a ga- mụbaa ọkụ eletrik...
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