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In Reply to: RE: Easy excellent tweak posted by Tweaker456 on February 25, 2014 at 13:42:59
Your life and property are worth more than any tweak.
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Class X is for applications where failure could not lead to electric shock (hot to neutral). Class X1 capacitors are intended to operate safely even in the presence of spikes on the mains supply of up to 4 kV (installation category 3 or overvoltage category 3 according to IEC60664), which are normally industrial supplies, but some standards call up class X1 capacitors if they are connected directly to the mains supply upstream of the equipment fuse, irrespective of the type of mains supply. Class X2 capacitors are intended to operate safely even in the presence of spikes on the mains supply of up to 2.5 kV (installation category 2 or overvoltage category 2 according to IEC60060), which are normally residential, commercial and light industrial supplies. X capacitors can be found from 0.001 uF to at least 10 uF and are only made in film.
Class Y capacitors are for applications where failure could lead to electric shock if the ground connection were lost. This includes hot/neutral to ground, and antenna isolation capacitors. Because Y capacitors shunt current to ground, leakage-current limitations limit their size to a maximum of about 4700 pF in many commercial and industrial applications (but refer to the relevant standard for definite information) and about 470 pF in medical applications.Cappic Larger ones are available however. Y caps are available from 1000 pF to 0.1 uF and are made in both film and ceramic.
Follow Ups:
A bit embarrassed on this one based on the safety issue. I'm am still correct on large amounts of x safety caps across the ac though, black to white. Tweaker
Take a look at the Magnan Audio recipe for in wall capacitors I linked to in this thread, "Everything you never wanted to know..." You will see that the highest value capacitor bank is around 40 microfarads. The smallest value used in some commercial filters like Enecom is only a fraction of a microfarad. Also note the high Voltage requirements (400-600 Volts) for the capacitors. Also note the emphasis on quality of the capacitors as opposed to quantity.
Edits: 02/28/14 02/28/14
has 8 uF Wima MKT400V between Live and Neutral. They placed it in a mdf enclosure but I am sure it won't pass safety tests.
Wima does make safety cap, Y2 and maybe others. I a quick look I don't think this model is a safety cap. MKT Tweaker
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