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Thanks for the responses. The wire connected to the fuse box is 12AWG and then goes to terminal blocks in each of 12 power districts on 2 decks. Each district will power as little as 2 switch

Maybe it’s me but the 12v 30 amp power supply gives me major cause for pause consistent with the comments about the wiring and “ampacity” of said wiring. I have a layout with multiple power

Yes. Suggest “quick blow” fuses or breakers. Charles

I like the circuit. The meter will need to be either analog or battery operated. The impedance of the meter at the desired amperage setting will need to be less than about 500 Ohms. I imagine that

Jerry, Protecting the wiring is a crucial element in choosing a fuse. You want the fuse to blow rather than have some wiring out under the layout melt or burn up. A thin drop wire might not be able

Dan, Wouldn't you use fuses that equal or are a bit lower than the maximum amps your system could draw? Jerry

In addition to the wire size and the ampacity of the wire, what is the expected maximum current drawn by the individual loads?? In practice, the wire size and the fuse should not be smaller than the

Dan, what is providing the 12V power? What size wire are you trying to protect? DonV

There will be some voltage drop of DCC track voltage. But it may or may not affect any noticeable loco speed settings. Adding an ammeter for every booster sounds like overkill. DonV

I left out of my original message that my power supply is a 12V 30Amp supply. My logic for adding a fuse block is to ensure that low (controlled) amperage goes to each section of the layout and to the

I am thinking about installing an ammeter in each of my power districts such as the one shown below (credit to Rob Paisley). I’m a novice when it comes to electronics. If I hard wire the ammeter to

I just did so and saved it to my Wishlist - no problem!!

For those who are looking for the book… Open the Amazon ap. Search for Allan Gartner and the book should show up as a possible selection. DonV

I just searched on Amazon and it doesn't show up at all. Bunch of other DCC books. Wil

Hi All, I'm considering putting a fuse box on the hot (red) side of my 12V bus. It's an automotive-type fusebox and I'm wondering if I should put 2Amp or 3Amp fuses in

So you guys are part of the reason Amazon said they were on back order for me. ?? DonV

What I have mentioned on one of the other chat boards is that our club is using inexpensive ($10 for 2) DC Volt/Ammeters that we bought from Amazon.? We install them between the DC supply and the

Just looked at Tony's Trains, the source of RRampmeters. The lowest priced version is $67.95. It has no enclosure. Here is the link: https://tonystrains.com/catalogsearch/result/?q=rrampmeter Rob

Robin, Love the disclaimer! But thanks again for all your help to us Tam Valley product users. Bill D N&W Steam Only

There is a DIY DCC Ammeter I designed awhile back about halfway down the page here: https://www.n3ix.com/pers/mr/model-railroad-projects/ Robin Robin Becker San Diego CA Sep 2, 2024 12:41:15 PM