NECdirektiivit

Could you clarify what NEC stands for in this context? The term NEC can refer to different things (for example, the National Electrical Code in the United States, a Nuclear Energy Directive, or another organization). Also, who is the intended audience (Finnish readers familiar with EU regulations, or a general audience)? Once I know the exact meaning and scope, I’ll draft a concise wiki-style article under 300 words.