Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: EN 60238:2004/A1:2008 (IEC 60238:2004/A1:2008)
• Năm ban hành / Publication date: 1970
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Edison screw lampholdersIEC 60238:2004
• Phạm vi áp dụng / Scope of standard: This International Standard applies to lampholders with Edison thread E14, E27 and E40, designed for connection to the supply of lamps and semi-luminaires* only. It also applies to switched-lampholders for use in a.c. circuits only, where the working voltage does not exceed 250 V r.m.s. This standard also applies to lampholders with Edison thread E5 designed for connection to the supply mains of series connected lamps, with a working voltage not exceeding 25 V, to be used indoors, and to lampholders with Edison thread E10 designed for connection to the supply mains of series connected lamps, with a working voltage not exceeding 60 V, to be used indoors or outdoors. It also applies to lampholders E10 for building-in, for the connection of single lamps to the supply. These lampholders are not intended for retail sale.