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Wiring/suitcase connector questions

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  • Member since
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  • From: Culpeper, Va
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Posted by IRONROOSTER on Monday, August 31, 2009 10:06 AM

Santa Fe all the way!

Last night I tried out the brown 3M connectors. They seem to work excellent,but I was surprised at how much force it took to bring the blades down onto the wire. I checked out 3m's site and they have a dedicated tool for this, but its a bit pricey, so I think I'll be using my channel locks.

 

Micromark has them  http://www.micromark.com/SCOTCHLOK-CRIMPING-TOOL,8952.html has them for less than list.  Still not cheap, but not as bad.  I have a pair and they work great.

Enjoy

Paul

If you're having fun, you're doing it the right way.
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Posted by tstage on Saturday, August 29, 2009 6:49 PM

Santa Fe,

Channel locks should work just fine.  I've use Craftsman RoboGrip pliers and they work very well for that application, too.

Tom

https://tstage9.wixsite.com/nyc-modeling

Time...It marches on...without ever turning around to see if anyone is even keeping in step.

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Posted by Santa Fe all the way! on Saturday, August 29, 2009 1:57 PM

Last night I tried out the brown 3M connectors. They seem to work excellent,but I was surprised at how much force it took to bring the blades down onto the wire. I checked out 3m's site and they have a dedicated tool for this, but its a bit pricey, so I think I'll be using my channel locks.

Come on CMW, make a '41-'46 Chevy school bus!
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Posted by prospekt mira on Friday, August 28, 2009 8:17 PM

Another option is to use each suitcase connector to provide power to 2 feeders. In this case I strip the ends of the feeders for about a half inch from the end, twist them together and then bend them back on top of the two feeders so that the blade hits the stripped portions first. I then tug to check for strenght and check for power before soldering or installling the track. Have done almost 80x2 connections this way and have had no issues. over a period of 3 years.  

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Posted by Santa Fe all the way! on Friday, August 28, 2009 6:58 PM

I found the 3M, brown suitcase connectors at a local home builder supply house. I got 100 of them for $35.

Come on CMW, make a '41-'46 Chevy school bus!
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Posted by samiam on Friday, August 28, 2009 3:56 PM

 

There are suitcase connectors for your wire sizes! First of all there called scotchlok insulation displacement connectors ( made by 3M ). The type or model is a T-TAP 4YT72 sold by Grainger. I've also found them at the local NAPA store. You lay your bus wire ( # 12 ) in it just like a regular suitcase connector and close it. This is where they differ. You put your # 20 wire into a regular nylon insulated male disconnect, PK500 ( model # 2DUZ2 ) and plug it into the side of the T-TAP. Unlike the suitcase connector if you make a mistake or need to use a different gage wire you just unplug it and plug the new one in. Hope this helps.  
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Posted by decoderboy on Friday, August 28, 2009 1:43 PM

I soldered all of the connections on my last layout and had no problems  but a stiff neck. When i started wiring my new layout i bought a roll of two conductor 14 guage house wire and stripped the white outer insulation off to leave the black and white wires for the bus. 3M makes a connector called a T-Tap Disconnect Terminal that will crimp on to the 14 guage wire. For the track feeders i use 22 or 24 awg hookup wire. I use Waldom male qk disconect terminals crimped on to the bus end of the feeders. This spade type connector plugs into the 3M T-Tap. Makes for fast, dependable wiring. Also, if you need to take the power away from a section of track you can simply unplug it. Mike

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Posted by IRONROOSTER on Wednesday, August 26, 2009 9:51 AM

Santa Fe all the way!

Good info guys, thanks. I will probably go with the 18ga feeders. With the larger gauge feeders, it will be a little harder to hide them where they attach to the rail. I dont think it will be a problem though. I checked the local Radio Shack, Ace Hardware, Wal Mart and Lowes and none of them carried the brown connectors. I guess I'll have to shell out $9 shipping for an online source.

 

Try checking an electrical supply house.  I have one in my area that carries them.

Enjoy

Paul

If you're having fun, you're doing it the right way.
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Posted by Santa Fe all the way! on Tuesday, August 25, 2009 11:14 PM

Good info guys, thanks. I will probably go with the 18ga feeders. With the larger gauge feeders, it will be a little harder to hide them where they attach to the rail. I dont think it will be a problem though. I checked the local Radio Shack, Ace Hardware, Wal Mart and Lowes and none of them carried the brown connectors. I guess I'll have to shell out $9 shipping for an online source.

Come on CMW, make a '41-'46 Chevy school bus!
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Posted by maxman on Tuesday, August 25, 2009 9:34 AM

I try not to wire from the bus directly to the rails, especially if there are parallel tracks (like in a yard) in the same area.  This just causes a bunch of clutter along the bus wire.  I go from the bus to a terminal strip which I have jumpered to provide multiple track connections.  From the terminal strip to the track I use 20 gage wire.  One end gets soldered to the rail, and the other end gets a spade connector to attach to the terminal strip.  That way you can use an appropriate gage wire to get from the suitcase connector to the terminal strip, and you require fewer of the suitcase connectors which are relatively expensive compared to spade connectors.

The other advantage of doing this is that it makes it easy to isolate things if you need to make a change or track down shorts due to swapped connections.

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Posted by tstage on Tuesday, August 25, 2009 8:01 AM

Santa Fe,

In Joe Fugate's DVD, he used the larger 12g wire with the 14g/18g 3M suitcase connectors by deinsulating a small section of the 12g wire and crimping onto it as if it were 14g wire.  (No one says you have to bite into insulation to use them.)  I believe Joe's been using this scenario on his layout for about 15 years now with no problems.

Tom

https://tstage9.wixsite.com/nyc-modeling

Time...It marches on...without ever turning around to see if anyone is even keeping in step.

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Posted by mobilman44 on Tuesday, August 25, 2009 7:47 AM

Hi!

You are correct, there is no suitcase out there to properly handle 12 g bus and 20 g feeders.  I'm in the middle of an HO DCC layout and use 14 g bus and 20 g feeders and so far everything is soldered.  However, mine is a two level layout and when I get to wiring the upper level I may find soldering to be much more difficult. 

I prefer the 20 gauge feeders, and don't want 18 as (for me) they are just too big.  Soooo, I may wire in 20 g feeders, then use a connector to tie it to an 18 g, which will hit the suitcase with the 14 g bus wire.  Certainly more work, but I need to remember that wiring - if done right - will last for many years.

As I've got a number of weeks to get to the main level wiring, I'm really interested to see what alternatives other posters come up with.

Mobilman44 

ENJOY  !

 

Mobilman44

 

Living in southeast Texas, formerly modeling the "postwar" Santa Fe and Illinois Central 

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Posted by jamnest on Tuesday, August 25, 2009 7:24 AM

I use 12ga wire for my DCC power buss and 18ga wire feeders.

Jim, Modeling the Kansas City Southern Lines in HO scale.

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Posted by Wazzzy on Tuesday, August 25, 2009 6:58 AM

if the wire is too thin for the suitcase connector....try stripping more wire and folding the stripped end over a few times to make it large enough for good conductivity.

just a thought.

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Posted by IRONROOSTER on Tuesday, August 25, 2009 3:23 AM

That's what I am using on my layout - 12ga bus, 18ga feeders with the brown suitcase connectors.  Works great for me.

Enjoy

Paul

If you're having fun, you're doing it the right way.
  • Member since
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Wiring/suitcase connector questions
Posted by Santa Fe all the way! on Tuesday, August 25, 2009 12:22 AM

Well, after I spent a fair amount of money on 12ga and 20ga wire for my DCC layout, I find that there is no one suitcase connector that will accomodate both these ga. I really dont want to use an extra set of connectors and I think I have enough 18ga wire around here, so would it be OK to use 18ga for the feeders and the 12ga for the buss?? 18ga and 12ga will work in the brown suitcase connectors.

Come on CMW, make a '41-'46 Chevy school bus!

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