[GreenKeys] Need wiring sheet of a WU M15TTY Base

[COURYHOUSE at aol.com]

this is crazy  who would have thought....   Ed#
 
 
In a message dated 8/3/2013 1:25:11 P.M. US Mountain Standard Time,  
steve.ripper at gmail.com writes:

 
Thanks  Jeff for the information. I moved into my new house in April and I 
am just now  getting my machines back online and I have the exact same 
problem. All of the  outlets the in the room I am using for radios and Teletypes 
are the ground  fault type. None of my machines will work in these type of  
outlets. 
 
Cheers, 
Steve  Ripper 
steve.ripper at gmail.com 
248-787-0705 

 
 
From:  greenkeys-bounces at mailman.qth.net 
[mailto:greenkeys-bounces at mailman.qth.net]  On Behalf Of Jeffrey D Angus
Sent: Saturday, August 03, 2013  3:52 PM
To: greenkeys at mailman.qth.net
Subject: Re:  [GreenKeys] Need wiring sheet of a WU M15TTY  Base

 
On 8/3/2013 1:21 PM, Norm wrote:

Has anybody ever had this  experience with a ground fault  outlet? 
Ground Fault Interrupters are  triggered by a difference of current
between the hot and the neutral side  of the line. Obviously they
should BOTH be the same.

Some equipment,  especially older, put a bypass capacitor from 
both sides of the power line  to ground. 

Such being the case, since neutral is close to the same  potential 
as the ground itself, there will be considerably less current  through
the capacitor on the neutral side than on the hot side. That's  your
imbalance and that's what is tripping the GFI.

<http://en.wikipedia.org/wiki/Residual-current_device>

For  a trip current of 5 mA, that only requires 24K ohms. At 60 Hz,
this is the  same as roughly 0.1 uF.

For this reason, the newer line bypass  capacitors are typically no
more than 0.015 uF. (roughly 750 uA. Which by  the way is still 
enough to get your ateention is you come across  it.)

Additionally, the capacitors need to be X and Y rated for safe  use
across mains power or from Mains power to ground.

<http://www.newark.com/pdfs/techarticles/johansondielectrics/JDI_Training-Sa
fety_2008-01.pdf>

Jeff-1.0
wa6fwi




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