That is the title of an article in the Jan/Feb 2010 magazine, by Thomas A. Rorro.
My report:
In this article, he discusses the discovery that many GFCI's near indoor pools were found to have failed in the 'on' position.
Investigation showed that corrosion had prevented the solenoid inside from moving. In general, the problems were discovered by using a plug-in tester, though in most cases the test button on the device also failed to operate.
The author seems to favor two changes to be made: that most GFCI devices, even indoors, have weathertight covers, and that GFCI protection is best provided at the panel.
The author does note that the GFCI's that failed were all made before 2003, when a major revision of GFCI standards took effect. He also notes that, more recently, a more corrosion-resistant "WR" GFCI has become available.
Last edited by renosteinke; 01/08/10 07:52 PM.
