AliExpress "explosion proof" Chinese factory test box

Although seemingly used in many Chinese factories, this unit is not compliant with electrical standards in "safer" countries.

It's described as an explosion proof tester - but that doesn't mean it can be used in high risk explosive environments. It just means it has a series load option that prevents faulty devices exploding, by limiting the current through them.

As with all these Chinese factory test boxes, they take a rather slack attitude to electrical safety, and the lack of polarity, exposed bulb threads and misuse of speaker connectors for 220V (China's supply voltage) means that the unit poses a shock risk to the unwary.

Still better than the two nails in a bench I've seen being used to test bulbs in some factory videos.

I suppose that one of the screw-in ceramic vivarium heaters could be used as a safety load too if the tungsten bulb it's designed for is hard to get.

These units are sold on AliExpress as LED bulb testers. But I really can't recommend them for safety reasons.


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