Lamp/Lampholder requirements for - US/Japan

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SUMMARY

The discussion centers on the compatibility of a UK E27 lampholder with US and Japanese electrical systems, which utilize E26 bulbs and operate at 100-120V. The designer seeks to sell a ceiling suspended lamp without metallic elements, questioning whether it is safe to wire the lampholder for use in these markets. It is confirmed that E26 bulbs can fit into E27 lampholders, but the critical factor is whether the lamp itself can operate safely at the lower voltage of 120V. The consensus emphasizes the importance of ensuring the lamp's electrical components are rated for both 120V and 240V to avoid safety hazards.

PREREQUISITES
  • Understanding of E27 and E26 bulb specifications
  • Knowledge of electrical voltage ratings (120V vs. 240V)
  • Familiarity with lamp design and safety standards
  • Basic principles of electrical compatibility and wiring
NEXT STEPS
  • Research E27 and E26 bulb compatibility and specifications
  • Investigate dual-voltage lamp designs and components
  • Learn about electrical safety standards for consumer products
  • Explore wiring techniques for lamps intended for multiple voltage systems
USEFUL FOR

Product designers, electrical engineers, and manufacturers looking to sell lighting products in international markets, specifically those transitioning from UK to US and Japanese electrical standards.

danskimanuk
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Firstly, my knowledge is basic as I have no grounding in physics or electronics , so please stick with me..

Secondly, as mentioned I am not a student of physics but am a designer, wanting to ensure that If I sell my product to the mentioned markets, that the product is safe to use and does not endanger anyone or their property...

OK..

I have a lamp design that I wish to sell online to the markets mentioned.

the lamp is a ceiling suspended lamp that has no metallic elements [and therefore needs no grounding, I think I am right in saying]. The design aspect is the shade and I want to utilise something of the shelf for a pendant lampholder.

Now, in the UK and Europe we use E27 bulbs, that draw on 240V mains. I want to be able to have my lamp used in the US and Japan also.

My question is, as I am not using a plug and fuse, can I just sell my lamp with a standard
UK Lampholder [E27] for use in the aforementioned countries?

I know america and Japan use E26, but have read that E26 bulbs can be used in E27 lampholders. If this is true, then all I need to know is if it is ok to wire my pendant lampholder into a 100-120V mains?

I know this is an electrical question [i have posted it in other forums!], but was hoping the underlying physics knowledge would inform me of whether this was feasible [using 220/240V equipment on 120V mains]. Even without any electrical/physics knowledge I can assume that the bulb if 240V would not illuminate sufficiently. Not sure what would happen if using a 120V bulb though...

any help on this matter would be much appreciated.

Dan
 
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We can't answer that. It is not a question of the lamp holder. It is a question of your new type of lamp. Does your lamp work at both 120V and 240V? Only you can know.
 

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