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Home » FAQs » What's a standard light bulb socket?
What's a standard light bulb socket?
2017-10-17 06:49:01

What's a standard light bulb socket? The medium E26 light bulb socket is the most common light bulb base. It is used in most incandescent, halogen, CFL, CCFL, and HID light bulbs. The mogul E39 base is found in larger sized light bulbs, such as high wattage HID.



C9 Bulbs have an intermediate or E17 base. These are historically known as the old Christmas light bulb size. Medium Bulbs have a E26 base (E27 in Europe). This is the same size as a standard household bulb.

standard light bulb socket IEC 60238:2004+AMD1:2008 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 light bulb socket also applies to lamp holders 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 standard light bulb socket E10 for building-in, for the connection of single lamps to the supply. These standard light bulb socket are not intended for retail sale. This consolidated version consists of the eigth edition (2004) and its amendment 1 (2008). Therefore, no need to order amendment in addition to this publication.
 

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