Hmm, .. I have no explanation as to why the failure rates would be the same. I didn't realize it said that. I was repeating something I had heard that sounded plausable. I did hear a UL rep say that the 'in use' covers will be required and that the purpose is to protect the GFCI itself.
Bill
[This message has been edited by Bill Addiss (edited 12-01-2001).]