On 09/28/2013 08:14 PM, Clem Cole wrote: a little more detail. the x means it uses Class X flame retardant dialectic -- in Germany for sure and probably most the eu, class X dialectic is required if you add filtering. Good info! any filter cap that goes between the mains and neutral had be made of class X (or class Y if my memory serves me) material or you can't getter German equiv of the us UL for the device [google this if you want to understand more]. Class Y is required for use from line to ground. -Dave -- Dave McGuire, AK4HZ New Kensington, PA