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Re: [RFI] AFCI and RFI

To: "Kenneth G. Gordon" <kgordon2006@frontier.com>, "Rfi@contesting.com" <Rfi@contesting.com>
Subject: Re: [RFI] AFCI and RFI
From: Gary <gary_mayfield@hotmail.com>
Date: Sun, 11 Mar 2018 15:04:15 +0000
List-post: <mailto:rfi@contesting.com>

     Probably worth reaching out to the ARRL on this one as it was a big deal 
with the Eaton breakers - I understand yours are Square D.



  There is an email link to Ed Hare, W1RFI, on the lab web page here:

Good Luck and Keep Us Posted - 73,
Joe kk0sd

-----Original Message-----
From: RFI <rfi-bounces@contesting.com> On Behalf Of Kenneth G. Gordon
Sent: Sunday, March 11, 2018 9:07 AM
To: Rfi@contesting.com
Subject: [RFI] AFCI and RFI

Local codes require those new AFCI (Arc Fault Circuit Interrupter) breakers in 
any circuit feeding a bedroom here.

We have two such circuits feeding our bedroom and an adjacent office in a 
recent addition to our home.

Whenever I am on 40 meters, either one or both AFCIs will trip off. This is 
highly annoying to my wife, and I don't like it much either.

I have contacted the maker of the breakers, Square D, and they tell me, after 
some rudimentary tests, that there is nothing wrong with their breakers.

So, I am left with trying to filter the RF off the lines to the breakers.

I had thought of connecting an X-2 type 0.01 uFd capacitor across the line and 
neutral wires going into the breaker, and a pair of Y-2 0.01 uFd types from 
both line and neutral to ground.

However, I am somewhat reluctant to try this as I suspect that the leakage 
across those caps will trip the AFCI off.

Tonight I thought that perhaps some ferrite filters, either a series of snap-on 
types, or some toroid types, on each wire which connects to the breaker would 
filter enough of the RF to prevent the breakers from tripping off.

Has anyone here run into this sort of problem and if so, how did you eliminate 

BTW, I am a qualified electrician, and wired our entire addition and the 
sub-panel which contains these breakers. The local Electrical Inspector gave me 
an "A" grade for my work.

Additional information: I am running close to a kW output to a vertical antenna 
which is about 25 feet from the breaker-panel. The vertical has a good 
ground-system, 32 radials, and I don't get this sort of problem from any band 
but 40 meters. My favorite mode is CW, although I also operate some digital 
modes, but at lower power, like 50 watts. I seldom operate voice. The digital 
signals never trip the AFCIs.


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