Third party cables and connectors are those sold without Apple certification. You see them everywhere. A bright rainbow of colored cables in a basket at the counter of your local drug store. For sale on web sites and even accompanying new accessories for your Apple products. It is never wise to use third party cables and connectors that are not certified to meet Apple standards. Some have been known to catch fire and others have ruined connector ports.
Now Apple is taking a stand against these inferior products and in iOS 8 users will find that their product may not charge. Plug in one of these and you will see a message that says: This cable or accessory is not certified and may not work reliably with this iPhone.
So, buyer beware.