1.		EN 50010 : low voltage switchgear and controlgear for industrial use. Inductive proximity switches. Methods for measuring the operating distance and operating frequency / European Commitee for electrothecnical Standardization Data Publicação: 1987 Tema: Normas
2.		EN 60081 : tubular fluorescent lamps for general lighting service: (IEC 81 (1984) edition + amdt 1 (1987) + amdt 2 (1988) / European Commitee for electrothecnical Standardization Data Publicação: 1989 Tema: Normas
3.		EN 50008 : low voltage switchgear and controlgear for industrial use. Inductive proximity switches. Form A, for direct current, 3 or 4 terminals / European Commitee for electrothecnical Standardization Data Publicação: 1987 Tema: Normas