----------------------------------------------------------
                           AeroElectric-List Digest Archive
                                      ---
                     Total Messages Posted Thu 06/09/11: 4
           ----------------------------------------------------------
 
 
Today's Message Index:
----------------------
 
     1. 06:42 AM - Re: Switch Position within the Circuit  (user9253)
     2. 07:14 AM - Re: Re: Switch Position within the Circuit  (ROGER & JEAN CURTIS)
     3. 07:18 AM - Re: Re: Switch Position within the Circuit  (Robert L. Nuckolls, III)
     4. 10:47 AM - Re: Switch Position within the Circuit  (stearman456)
 
 
 
________________________________  Message 1  _____________________________________


Time: 06:42:56 AM PST US
Subject: AeroElectric-List: Re: Switch Position within the Circuit
From: "user9253" <fran4sew@banyanol.com>


The master contactor is an example of switching the negative side of a circuit.
There is nothing wrong with doing it that way as long as good workmanship is
used.  If the aircraft is not wired according to common practices, it will be
confusing to future troubleshooters.  It is better to follow convention unless
there is a compelling reason to be different.
Joe

--------
Joe Gores


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=342491#342491


________________________________  Message 2  _____________________________________


Time: 07:14:50 AM PST US
From: "ROGER &  JEAN CURTIS" <mrspudandcompany@verizon.net>
Subject: RE: AeroElectric-List: Re: Switch Position within the Circuit


The master contactor is an example of switching the negative side of a
circuit.  There is nothing wrong with doing it that way as long as good
workmanship is used.  If the aircraft is not wired according to common
practices, it will be confusing to future troubleshooters.  It is better to
follow convention unless there is a compelling reason to be different.
Joe


		Correct me if I am wrong but, I believe that what joe is
saying is that the switch which controls the master contactor goes to
ground.  The master contactor itself is on the positive side very close to
the battery.

		Roger

________________________________  Message 3  _____________________________________


Time: 07:18:58 AM PST US
From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
Subject: Re: AeroElectric-List: Re: Switch Position within the Circuit


At 12:44 PM 6/8/2011, you wrote:
>
>Of course!  All it would take is a chafed wire.  Man, I can be 
>dumb.  Thanks for the help - back to the drawing board!
>
>Dan

   It is not uncommon to have pull-to-ground control
   systems. Our automobiles have them at every door
   light switch, hour-meters on many airplanes pull-to-
   ground. There are dozens of ground-side switched
   circuits in a Beechjet.

   You do what becomes the most elegant solution to
   your design goals. Of course, all circuits are
   protected upstream by fuse or breaker . . . which
   is what deals with issue of electrical hazard. But
   don't add parts count just to steer away from
   ground-side switching.


   Bob . . . 


________________________________  Message 4  _____________________________________


Time: 10:47:09 AM PST US
Subject: AeroElectric-List: Re: Switch Position within the Circuit
From: "stearman456" <warbirds@shaw.ca>


Thanks, Bob.  I like to stick with convention but I'll have a good long stare at
it tonight with your advice in mind.

I appreciate the help, everybody.

Dan


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=342522#342522


 

-------------------------------------------------------------------------------------
                       Other Matronics Email List Services
-------------------------------------------------------------------------------------
Post A New Message               aeroelectric-list@matronics.com
UN/SUBSCRIBE                     http://www.matronics.com/subscription
List FAQ                         http://www.matronics.com/FAQ/AeroElectric-List.htm
Web Forum Interface To Lists     http://forums.matronics.com
Matronics List Wiki              http://wiki.matronics.com
Full Archive Search Engine       http://www.matronics.com/search
7-Day List Browse                http://www.matronics.com/browse/aeroelectric-list
Browse Digests                   http://www.matronics.com/digest/aeroelectric-list
Browse Other Lists               http://www.matronics.com/browse
Live Online Chat!                http://www.matronics.com/chat
Archive Downloading              http://www.matronics.com/archives
Photo Share                      http://www.matronics.com/photoshare
Other Email Lists                http://www.matronics.com/emaillists
Contributions                    http://www.matronics.com/contribution
-------------------------------------------------------------------------------------

These Email List Services are sponsored solely by Matronics and through the 
generous Contributions of its members.