Diavonex wrote:
I never turn off my iPad to plug in the 30 pin plug. I only make sure the wall socket is off.
The OP was speaking of the Lightning connector and that's what I responded to. The Lightning connector is pretty well protected against anything like a short. If it weren't then Apple wouldn't have chosen a male connector with the tabs exposed.
As far as that goes, I don't remember ever reading anything that indicates it is necessary to plug in one item--charger, cable, iOS device--before the other on either the 30-pin or the Lightning connector and I believe that if it were necessary Apple would have cautions all over the documentation.
If you know of any such warnings--from Apple--I'd really like to have a pointer to one.