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Wire size for decoders?

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  • Member since
    February 2004
  • From: Knoxville, TN
  • 2,055 posts
Wire size for decoders?
Posted by farrellaa on Wednesday, February 2, 2011 2:56 PM

What is the largest size wire you would recommend for installing decoders and associated lighting? I bought some wire assortment on Ebay and it is too big, I don't know what gage it is but ordered it because it came in all the colors used by NMRA decoder standards. I assumed it was the correct one. I have an option to buy the same colors in 26AWG from All Electronics at very reasonable prices ($1.50 for 25 feet) but don't know if it is OK. I have seen it mentioned in some posts or articles of using 30 AWG but that seems too small to work with. What would you recommend?

    - Bob

Life is what happens while you are making other plans!

  • Member since
    March 2007
  • From: South Carolina
  • 1,719 posts
Posted by Train Modeler on Wednesday, February 2, 2011 3:19 PM

It depends on what you're doing with it, how much room you have, scale, cost, etc.     Either would be OK.  Digitrax's decoder wire as I recall is 30AWG, so that is preferred by most.    The problem with 26 is it may be too thick and take up too much room?    I have found that not all 30 gage is really the same either.   Insulation thickness has varied sometimes by brand.    Using stranded, flexible wire is important.   It stays soldered better than a large single copper wire.

Richard

  • Member since
    February 2002
  • From: Reading, PA
  • 30,002 posts
Posted by rrinker on Wednesday, February 2, 2011 3:34 PM

 Number of strands often varies as well. I just bought a pack of the decoder wire that Digitrax sells, I usually don;t need much because I save all the pieces cut from earlier installs, but sometimes I need some extra, and by getting the actual decoder wire I have it in matching colors so as much as possible everythign matches the NMRA recommended wire color.

                     --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

  • Member since
    October 2006
  • From: Western, MA
  • 8,571 posts
Posted by richg1998 on Wednesday, February 2, 2011 3:53 PM

For decoders, I use the #30 DCC color pack from Litchfield Station. About ten feet of each color.

Don't forget small shrink and Kapton tape. I have the NMRA DCC color shrink I found at a train show last year.

Rich

If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.

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