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Offline baggio  
#1 Posted : 20 February 2017 18:22:16(UTC)
baggio

Canada   
Joined: 21/09/2012(UTC)
Posts: 1,717
Location: Toronto
Does anyone know if this K track crossing is suitable to use in a Dc / AC/DCC operation (no 2258)?

Thank you.

BigGrin

K track crossing

Offline mike c  
#2 Posted : 21 February 2017 04:25:37(UTC)
mike c

Canada   
Joined: 28/11/2007(UTC)
Posts: 7,337
Location: Montreal, QC
As far as I remember, the K crossing does have plastic isolated rail sections (lower left, upper right) that separate the rails at the crossing point. I am not sure if the rails are connected on the underside though.

Regards

Mike C

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Offline applor  
#3 Posted : 21 February 2017 05:11:14(UTC)
applor

Australia   
Joined: 21/05/2004(UTC)
Posts: 1,515
Location: Brisbane, Queensland
I can check for you tonight but I am pretty sure only the wide radius turnouts and crossover/double slip have isolated rails.
modelling 1954 Germany (era IIIa)
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Offline Old Guy  
#4 Posted : 21 February 2017 15:41:43(UTC)
Old Guy

France   
Joined: 19/02/2017(UTC)
Posts: 13
Location: In the middle of nowhere...
Hope that helps:

2258

The black rails inside the circle are made of plastic, although the two wide studs in the middle are (naturally) made of metal.
Gone insane. Back soon !
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Offline jcrtrains  
#5 Posted : 21 February 2017 21:45:00(UTC)
jcrtrains

Canada   
Joined: 31/10/2009(UTC)
Posts: 561
Location: Toronto, Ontario
I think it is a Mike question but let me offer my views on the picture. I think the insulation in the above picture on the top and bottom rail intersections is weak. There seems to be very little gap between the rails.

I think there is a 2nd problem in DC. Given the inside of the crossing rails seem to be all plastic, you will have a break in the current.

The below is a standard DC crossing. You will see the rails inside the crossing are metal to provide current continuity. You will also see a higher amount of insulation where each rail crosses.

sl-393-peco-streamline-short-crossing-n-gauge-code-80-insulfrog.jpg
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Offline baggio  
#6 Posted : 21 February 2017 22:33:10(UTC)
baggio

Canada   
Joined: 21/09/2012(UTC)
Posts: 1,717
Location: Toronto
Thank you for your feedback, guys, much appreciated. BigGrin

What do normally DC users do then, do they use crossings or avoid them out of concern for the current interruption/polarity issues?
Offline jcrtrains  
#7 Posted : 21 February 2017 23:31:08(UTC)
jcrtrains

Canada   
Joined: 31/10/2009(UTC)
Posts: 561
Location: Toronto, Ontario
If a DC user uses the crossing that I showed, there is no current interruption or polarity issue. I have two on my layout.

Let me also clarify my previous statement on current interruption. I was referring to the k track crossing and using that with DC. The crossing I included has metal rails in the middle of the crossing and thus there is no current interruption issue.

Thanks
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Offline applor  
#8 Posted : 06 March 2017 07:39:50(UTC)
applor

Australia   
Joined: 21/05/2004(UTC)
Posts: 1,515
Location: Brisbane, Queensland
I remembered about this questions and fished around for my crossing to check it today.

I can report that the rails are not isolated, they are electrically connected. Interestingly though, the left and right sides are completely isolated (looking at Old Guys picture)
modelling 1954 Germany (era IIIa)
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