Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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Re: Outlet Caps?????

Posted by Tweekeng (A) on March 3, 2007 at 10:22:24

In Reply to: Re: Outlet Caps????? posted by kenster on March 2, 2007 at 23:30:22:

I know I should not say anything because of the way doubters are treated on the board but just take a little time to think about the big picture here.

Yes, U R missing the purpose of the iso-clean AC caps. Only the Earth GND pin makes an electrical connection thereby blocking any EMI/RFI from entering the Earth GND loop at that outlet. The Line and Neutral have NO connection on the cap.

Ok so you have just added an small antenna to the end of your GND. I still don't see how that's going to block anything from entering the GND wire since it is attached to the GND wire and now you basically have a GND wire with a big flag attached to the end.

I suppose you could say that it blocks RF from entering the hot the neutral. OK, I guess it could but only from the front.

What about the sides? Many in wall electrical outlet boxes are plastic these days. RF flows pretty freely through plastic. Wont it go right around that little cap?

So you are lucky enough to have metal in wall boxes and have them grounded. Nice but what about the hundred feet of unshielded wire in your wall? Walls are mostly wood and plaster board. RF flows pretty easily through wood and plaster board.

If code allows you could run metal conduit and ground it, maybe find some shielded wire...

But then there is that block of unshielded wire hanging in mid air leading from your house all the way up the street to the transformer.

So when you look at the bigger picture these outlet caps are nothing more than a pretty decoration.

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