Originally Posted By: jpeck
This post was automatically imported from our archived forum.
That is a problem inspectors in my area found and reported to Leviton and other manufacturers.
A study was financed (partially by Leviton) and it turns out that about 80% of the older GFCIs were defective in various ways. One of those ways is that they reset with reverse polarity.
The new GFCI requirements are a result of some of the results of that study.
Now, when a GFCI is not wired properly (line / load reversed) and / or defective, there are internal protections against resetting incorrectly. Leviton has a 'Lock Out' system in that it will not reset unless it is wired properly and unless it resets properly.
There is but one solution - replace those defective GFCIs.
By-the-way ... get a GOOD tester. YOU ... ARE ... A ... PROFESSIONAL, don't use those cheap homeowner night lights (that is about what they are good for), they are unreliable and short lived for our use.