Another piece of trivia. An Electrical product is permitted to have a loss up to .5ma and still be listed. The importance of this tidbit comes into play where there is a 'nusance' tripping going on. As the GFCI operates on a cumulative value of stray current it could seem to be tripping for no reason but it may be operating perfectly. There could be 8 items on the circuit with a .5 'loss' each (8 x .5 = 4ma) and tripping could occur and there is nothing wrong. It's something to think about when deciding on CB vs Receptacle type GFCIs' and the number of downstream devices and length of a circuit protected by a single GFCI.

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Bill

Bill