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Old 08-01-2018, 03:31 PM   #11
Flashbang
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Hi

I would fit 12 IRJs, but you could get away with 10 if the two sidings don't have rail feeds. IMO always best to fit 2 IRJs per point and add power feeds as necessary.

Solder around 150mm long insulated dropper wires to the factory fitted bare frog wires and feed them down below baseboard via small holes under the point, as this then allows for later frog polarity switching if chosen. Coil the frog droppers up so as they cant touch anything until needed.
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Old 08-01-2018, 03:38 PM   #12
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That's a really good idea, thanks. That'll save some work when I'm ready to fit point motors. I'm going to have feeds on the sidings so 12 IRJs it is. Thanks again, you've probably saved me from tearing my hair out later!
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Old 08-01-2018, 03:46 PM   #13
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If you plan to add the reliability modification outlined in Brian Lambert’s guide (well worth it by the way) you will need to do it before you lay the points or at least be able to lift them without damage at a later date.
I think that would mean adding the polarity switches at the outset as well. Of course if you are DCC (can’t remember what you are going with) then autofrog modules can be used which are independent of any point motors.
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Old 08-01-2018, 03:50 PM   #14
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Another thing you may already be doing but just in case... Is to cut a slot approx. 4mm wide and 9mm long directly under each points moving stretcher bar where the drive pin hole is located before laying the point. The slot then allows for the point motors drive pin to pass up from below into the stretcher bars hole. Its almost impossible to cut a slot or make a 9mm dia hole once the point is laid and fixed without causing damage to the points underside or having to lift it again!
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Old 08-01-2018, 03:58 PM   #15
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So what we’re actually saying is do a full installation at the outset or it will make life difficult further down the line.
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Old 08-01-2018, 04:11 PM   #16
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Almost yes. The OP is N gauge and the normal full conversion of either removing two links factory fitted across the two closure rail gaps or cutting gaps in the two closurer rails isnt necessary on N points. As the space between open switch rail and stock rail is greater in N than OO etc.

Pre wiring the frog and drilling point motor drive pin slots is well worth the effort though.
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Old 08-01-2018, 04:50 PM   #17
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Thanks FB, I hadn’t realised that.
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Old 08-01-2018, 06:13 PM   #18
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Pre drilling holes for the point motor pin is the one thing I had already thought of, believe it or not! Everything else is other people's suggestions! Which I really appreciate, as I can see that I will be saving myself grief later on down the line.
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