Discuss Hamilton switch... burnt out ! in the UK Electrical Forum area at ElectriciansForums.net

The melted plastic alongside the switch mechanism, suggests that the heat came from the contacts, not the wiring terminals. High resistance or arcing could be caused by lack of pressure e.g. something mechanically broken, jammed or dirty, or faulty manufacture of the contacts themselves. I agree it's not likely to be caused directly by inrush, only by the continuous load. Excessive inrush can cause contact wear and damage and in time lead to failure, but not immediately. The switch is rated 10AX which means it doesn't need derating for inductive fluorescent / discharge lamp loads. LED drivers are not inductive so it's not directly comparable but it does mean the contacts are designed with inrush durability in mind.

Re. the CE mark, that is not the correct form and I too would be put on guard by a product from a reputable manufacturer with an incorrect marking. If the C is made into a complete circle it should just overlay the nearest side of the E. Non-standard marks like this have sometimes been used on non-compliant products and passed off as a different 'China Export' mark which is a scam.
 
The melted plastic alongside the switch mechanism, suggests that the heat came from the contacts, not the wiring terminals. High resistance or arcing could be caused by lack of pressure e.g. something mechanically broken, jammed or dirty, or faulty manufacture of the contacts themselves. I agree it's not likely to be caused directly by inrush, only by the continuous load. Excessive inrush can cause contact wear and damage and in time lead to failure, but not immediately. The switch is rated 10AX which means it doesn't need derating for inductive fluorescent / discharge lamp loads. LED drivers are not inductive so it's not directly comparable but it does mean the contacts are designed with inrush durability in mind.

Re. the CE mark, that is not the correct form and I too would be put on guard by a product from a reputable manufacturer with an incorrect marking. If the C is made into a complete circle it should just overlay the nearest side of the E. Non-standard marks like this have sometimes been used on non-compliant products and passed off as a different 'China Export' mark which is a scam.
Thanks Lucien very helpful and informative of you 🤩
 
Got couple more Hamilton here (dodgy one on LHS) to compare CE......
IMG_8500.jpg
 





Both types shown
 
Wouldn't be at all surprised if they were counterfeit. You'd be surprised how much counterfeit stuff gets into 'proper' supply chains. Its not just ebay and amazon.
 
Wouldn't be at all surprised if they were counterfeit. You'd be surprised how much counterfeit stuff gets into 'proper' supply chains. Its not just ebay and amazon.
Virgin Records know all about that ! trading standards once claimed up to 30% of their vinyl and CD's where fake .Not Virgins fault directly , just cheating suppliers !
 
Good spot @LukeD (post 14), first unit has proper CE mark, second one dubious. Of course it could just be that their subcontractor doesn't have the right artwork and the dimmer is completely genuine, but I wouldn't be letting that out on one of our products because I would hope that savvy customers would question its authenticity. I've seen quite a few dodgy misshapen or mirror-image kitemarks on counterfeit and unapproved moulded plugs and cord sets, that the casual user would take to be an approval.
 
Virgin Records know all about that ! trading standards once claimed up to 30% of their vinyl and CD's where fake .Not Virgins fault directly , just cheating suppliers !

Good example. I saw an interesting documentary a few years ago which showed how counterfeit Ford spares actually got into the smaller Ford dealerships. They weren't even aware.
 

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