Re: [Z_Scale] Re: Module Wiring, bus wire size (etc.)
- Hey Jeff and Gang
Jeff, step right up and plug in, LOL!
2 reasons I use 14 gau stranded; its what I have a monster spool of and a little over kill in DCC never hurt anything, LOL.
Hope every one had a safe and fun 4th!
Sent from my U.S. Cellular BlackBerry® smartphone
From: sj_baz_man <sjbazman49@...>
Date: Wed, 4 Jul 2012 19:05:42
Subject: [Z_Scale] Re: Module Wiring, bus wire size (etc.)
Dave, can I tap into that room feeder ? :)
Actually, since we run a 5 Amp DCC, I have 14 gauge for a few feet to the Electronic circuit breakers. After that, it is 18 gauge from one end of the module to the other and the Z-Bend Track (ZBT) cables, 18" long. 22 gauge to the local track feeders.
Module interconnects use 3 pins for each single 18 gauge wire, per ZBT wiring practices.
--- In firstname.lastname@example.org <mailto:z_scale%40yahoogroups.com> , "David Mummery " <d_mummery@...> wrote:
> Hey Jeff,
> So then your saying the 14 ga stranded I'm using for buss is good?
> Dave Mummery
> Sent from my U.S. Cellular BlackBerry® smartphone
> -----Original Message-----
> From: sj_baz_man <sjbazman49@...>
> Date: Wed, 4 Jul 2012 18:24:54
> To: <email@example.com <mailto:z_scale%40yahoogroups.com> >
> Subject: [Z_Scale] Module Wiring, bus wire size (etc.)
> OK, I'll fire the first salvo. Note the 'etc.' so you guys can get ay off topic, as usual.
> Z-Bend Track standards call for 18 gauge (o.8mm^2) is called for. This was primarily for forward looking operations, like mega-module layouts and primariy DCC which, at the time, were 5 and 10 Amp systems.
> 18 gauge wire is capable of carrying apprx 14 Amps. HOWEVER, there are many, many factors. DC, or high frequencys "AC" used in DCC. How long of a run (1 foot or 100's). Number of connectors, etc. Placing an 18 gauge wire across a car battery will take ~1-5 seconds before it 'fuses' (seperates at it's weakest point). This is radical but reinforces the 'design for the wekest link'. Many of the modules I see use #26 solid twisted pairs stripped from Ethernet cable. Thats a no-no as the solid wire is highly fragile (does NOT survive flexing!) and the much smaller wire *severely* limits current in case of a short - a BIG no-no wioth DCC operations where the Booster is designed to electronically shut down from excessive current. Other modules use clear 'speaker wire' often only #22. Still technically too small.
> Here's a techie chart to show various factors:
> Here's a good derating site:
> SF Bay Area Z