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What gauge wire to use?

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  • Member since
    June 2007
  • 196 posts
Posted by Reformed Grownup on Tuesday, April 22, 2008 11:27 AM
 tomikawaTT wrote:

For the short runs you are planning, 22ga wire will handle up to 7 amps!  (Surprised me, too.)

For long runs and continuous use, the same wire is rated at just under 1 amp, and has about 1.7 ohms of resistance per 100 feet.  I'm pretty sure that the momentary pulse of a CD unit would safely pass enough power to throw any commercially-available switch machine, even on a basement-filler.

Chuck (modeling Central Japan in September, 1964)

7 Amps!

Good news indeed!

 

thanks all around

Richard
  • Member since
    February 2005
  • From: Southwest US
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Posted by tomikawaTT on Tuesday, April 22, 2008 10:22 AM

For the short runs you are planning, 22ga wire will handle up to 7 amps!  (Surprised me, too.)

For long runs and continuous use, the same wire is rated at just under 1 amp, and has about 1.7 ohms of resistance per 100 feet.  I'm pretty sure that the momentary pulse of a CD unit would safely pass enough power to throw any commercially-available switch machine, even on a basement-filler.

Chuck (modeling Central Japan in September, 1964)

  • Member since
    October 2005
  • From: Ulster Co. NY
  • 1,464 posts
Posted by larak on Monday, April 21, 2008 9:57 PM

22 ga is fine to run a single Atlas unit. Don't try to run five of them on one wire. Feed each one seperately or you will get too much voltage drop.

Karl 

The mind is like a parachute. It works better when it's open.  www.stremy.net

  • Member since
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  • From: Eastern Shore Virginia
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Posted by gandydancer19 on Monday, April 21, 2008 5:04 PM
The 22 gauge wire should work just fine for the lengths that you have.  But if you do run into problems, just double up as previously suggested.

Elmer.

The above is my opinion, from an active and experienced Model Railroader in N scale and HO since 1961.

(Modeling Freelance, Eastern US, HO scale, in 1962, with NCE DCC for locomotive control and a stand alone LocoNet for block detection and signals.) http://waynes-trains.com/ at home, and N scale at the Club.

  • Member since
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Posted by BlueHillsCPR on Monday, April 21, 2008 4:06 PM

If you are concerned you could just double up conductors with the 22 ga.

  • Member since
    June 2007
  • 196 posts
What gauge wire to use?
Posted by Reformed Grownup on Monday, April 21, 2008 2:57 PM

I'm still working on constructing my Capacitor Discharge Unit/Diode Matrix combo to power my switch machines (Altas twin solenoid). I started to think about "what's next" and I am now wondering what size wire will handle the juice between the Diode matrix and the switch machines. I have several rolls of 22 gauge solid wire that I would like to use if possible. I have a feeling 20 gauge might be more appropriate...

 

The particulars:

-The CDU/DM will be no further than 6 feet from any given turnout.

-I don't anticipate throwing more than 5 points at once

-I'm running the CDU off an old Life-like transformer (12-14V)

-The CDU is constructed with 3 1000mf capacitors for "pop" or "snap" (hold the crackleWhistling [:-^])

Guidance?

 

Thanks!

 

Richard

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