Does the iPad 3/4 charger use a standard C7/C8 interface?

Solution 1:

I happen to have a C8 plug from my PS Vita charger, and my iPad (3rd gen) charger here. I plugged them into each other, and plugged in my iPhone. Sure enough, it started charging my phone.

picture showing c8 plugged in to ipad charger

So yes, this does work fine. C8 plugs will plug into the iPad 3 chargers.