E26 lampholder and E27 have been designated as the IEC standard . Lighting system in each country because of different mains voltages vary , E26 mostly mains voltage is 100V ~ 120V countries used , E27 for the 220V ~ 240V multi- national use. So the market seen E26 bulb fixed voltage is 100V ~ 120V for multiple ; E27 mostly 220V ~ 240V , and industrial machinery with safety bulb to 36V .
E26 and E27 are two outer diameter of the thread are close to valley difference is the thread depth E , E26 relatively shallow . Another E27 base of the neck is longer than the E26 , so the two should match their specifications lamp holder. If the E27 to E26 lamp holder cap screwed on , you will find a lot of neck exposed metal experience ( likely to cause an electric shock ) . E27 except in China , are also common in Europe . E26 in North America , more common in Japan .
1, E on behalf of Edison screw bulbs , 26, 27 refers to the nominal diameter of the bulb thread . E26 is the American standard specifications , E27 is the European standard specifications. Our country also uses the European standard specifications
2, E26 E27 less than half of the spiral , the former is 110V, which is 220-240V, although there is not much difference in the use , but if E26 use in European countries is certainly short life , it is easy for the body to produce unpredictable hazards
3, E26 E27 caliber is not quite as big , one is 26 , one is 27 , you can use the bulb to compare the test: You can use an E26 bulb test ; feel tight that is E26 , the E27 is a relatively loose ; contrary E27 bulb can also be used for testing : tight is E26 , the E27 is better rotation can also sign up from certified distinguishing ! !
I remember a little height E27 high !
4.E26 not only look different with E27 , E26 usually have cable , but the E27 is usually to connect wires threaded terminal ; two are different standards department
porcelain lampholders , E26 is the American standard system , E27 is based on IEC standards Department ; export certification,
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