Testing Socket/USB Combo Circuits

[Adam W]

Presumably they have some kind of transformer in them, and I was under the impression that is only energised when something is plugged into them, so it wouldn't be any different to unplugging all the 230v appliances before doing an IR on an EICR.
I was taught that RCDs will happily withstand an insulation resistance test, like when you bunch test the whole board.

 

[chronyx]

Totally justified contempt there Murdoch ..... seems they are just not ready for safe use yet.....
http://www.electricalsafetyfirst.org.uk/mediafile/100145109/web_usb-article-from-so32.pdf

I always use a computer/car charger/TV/games console for USB charging of devices.

Thanks for that, had seen these advertised and was thinking about getting one.

On second thoughts I'll pass.