proyecto de norma oficial mexicana proy-nom-019-scfi-2016 equipos de tecnologias de la informacion y sus equipos asociados asi como equipo de uso en oficina - requisitos de seguridad draft mexican official standard proy-nom-019-scfi-2016 information technology equipment and related apparatus and office equipment - safety requirements this text will cancel mexican official standard nom-019-scfi-1998 36 pages in spanish the notified draft mexican official standard covers information technology equipment and related apparatus powered by mains electricity other energy sources such as batteries or accumulators self-generated energy or alternative power sources with single-phase supply voltages of 100 to 277 v ac at 60 hz and or three-phase voltages of 173 to 480 v ac at 60 hz operating u to 3 000 metres above sea level. the draft text also covers information technology equipment and related apparatus - designed to be used as telecommunications terminal equipment and telecommunications network infrastructure equipment regardless of the power source used - designed and intended to be directly connected to or used as infrastructure equipment in a cable distribution system regardless of the power source used - designed to use the ac power supply as a means of communication transmission see note 4 chapter 6 and note 4 section 7.1 of mexican standard nmx-i-60950-1-nyce-2015 . it also covers components and sub-assemblies that are designed to be incorporated into information technology equipment and related apparatus. the compliance of components and sub-assemblies is demonstrated through a certification scheme based on production process quality management systems. the text also covers new second-line discontinued rebuilt reconditioned used or second-hand information technology equipment and related apparatus. note this draft mexican official standard may be applied to the electronic parts of equipment including where such equipment is not fully covered by the scope of the standard for example large-scale air-conditioning systems fire-detection systems and fire-extinguishing systems. different requirements may be necessary for certain applications