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First off, thank you OGR for putting this project video on Youtube! This is a really useful project.

I am interested in building it so I went to the Newark website (the company the video cites as sources for the parts) and was a bit shocked to see that the prices for the parts were $136 before shipping. The project box is $32, the eight binding posts are $90, and the four fuses are $14. I understand the cost for the project is certainly cheaper than paying for a new engine that gets blown due to a short circuit, but I didn't realize they would be so high.

Jim originally built it with four circuits, probably because a Lionel ZW transformer has four outputs. On my layout, I don't need all four. I could probably do with just two, which cuts some of the cost down. But I wondered if everything had to be mounted in a project box at all. It certainly looks nicer with everything contained in one black box, but could I just get a smaller project box for two of the fuses and then screw the box to a wood board, with wires running out of the box into terminal strips also screwed to the board? This would remove the need for the binding banana jack binding posts and the project box could be a lot smaller too because there would be a lot less going on inside.

Any thoughts? Thanks.

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You can build a quality circuit breaker box with four channels for a ton less than buying at places like Newark.  Truthfully, I wouldn't use fuses anyway, use the Airpax zero delay circuit breakers, they're between $10 & $15 as a rule.  Even though this is more expensive than fuses, you don't have to replace them for every derailment.

You can buy the banana binding posts for less as stated, and you could also consider a terminal strip since this is more or less a permanent installation I would suspect.

You can build a quality circuit breaker box with four channels for a ton less than buying at places like Newark.  Truthfully, I wouldn't use fuses anyway, use the Airpax zero delay circuit breakers, they're between $10 & $15 as a rule.  Even though this is more expensive than fuses, you don't have to replace them for every derailment.

You can buy the banana binding posts for less as stated, and you could also consider a terminal strip since this is more or less a permanent installation I would suspect.

The fuses were fast-acting fuses which could be reset by flipping the toggle switch on them. You didn't actually have to replace a glass fuse every time a short occurred.

Are Airpax zero delay circuit breakers better for our trains?

Thanks

If they had handles, they're not fuses.  What is the part number of the ones recommended.  I'd be very surprised if they're using anything but a standard thermal breaker.  In which case, they're not nearly as good as the Airpax zero delay breakers.

WA28-XQ1A-10—yes, they're thermal breakers.

@BenLMaggi, there's lots of good info about the Airpax circuit breakers here: https://ogrforum.com/...-internal-mechanisms.

This thread has links to Digikey's and Online Components' stocks of Airpax circuit breakers for purchase:
https://ogrforum.com/...6#180495596857234856.

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