Print Page | Close Window

12v power distribution?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=119905
Printed Date: May 29, 2024 at 3:26 PM


Topic: 12v power distribution?

Posted By: shafferny
Subject: 12v power distribution?
Date Posted: February 04, 2010 at 3:22 PM

What is the most effective of distributing power from one 12v/30A wire into four?

Basically I'm looking to power four to five polarity wires on the remote starter I'm going to installing. I want something clean and professional.

Any thoughts or ideas?  




Replies:

Posted By: chev104275
Date Posted: February 04, 2010 at 3:44 PM
what kind of car ?    what kind of system ?

-------------
If i Can't Install it    I Don't need it   Joe




Posted By: shafferny
Date Posted: February 04, 2010 at 4:49 PM

Vehicle '03 Jeep LIberty - Remote Starter Viper 5101

When I go to install there are going to be at least four +12v constant connections. I'm thinking of running one wire from the battery to power all four connections.  I'll need to power two polarity feeds for onboard relays, plus power the remote stater itself, and finally the door lock interface (Omega DB-CHDL4P).





Posted By: tedmond
Date Posted: February 04, 2010 at 5:04 PM

the wire at the ignition harness be able to handle the current load.

if you wish, you can run an 8 guage into the knee kick and pull all your power from there.



-------------
Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert




Posted By: shafferny
Date Posted: February 04, 2010 at 5:11 PM

tedmond, I've currently got a POS Desigen Tech RS installed in the Jeep with a dedicated power wire ran through the firewall, so I may just reuse that. What is the best way to divide up power from one wire though? Do three separate splices into it and branch off? That seems like a messy install though.





Posted By: oldspark
Date Posted: February 04, 2010 at 5:35 PM
Splice? You mean split the cable? ??

I use wire joiners - screw terminals etc.
Others use other splitting systems.
Some use fuse boxes (4 - 6 fuses etc) depending on suitabiliy.




Posted By: shafferny
Date Posted: February 04, 2010 at 5:41 PM

Yes. Splitting the cable/wire to send power where it needs to be.





Posted By: oldspark
Date Posted: February 04, 2010 at 6:12 PM
So splitting a 30A cable into 4 splits of 7.5A each, or 10+10+5+5 etc?

No - that is neither clean nor professional.

But if you can get that looking clean, then you shouldn't object to splicing (and soldering) the required wires to it.
Not that many professional might do that (I don't know), but I do, and car manufacturers do (or did).

Isn't it cute how "clean" and "good looking" definitions vary?




Posted By: shafferny
Date Posted: February 04, 2010 at 6:31 PM

My plan is to do exactly as you described oldspark. I'm just wondering if there is a simple and effective alternative to accomplish the same thing. I don't want to go so far as to install a fuse block, but what alternative are out there?





Posted By: tedmond
Date Posted: February 04, 2010 at 6:55 PM

a fuesd distribution block will do.

or you can just use inline fuses on the wires that you will drawing 12v from. a fuse box would be nice, but clutters up room.



-------------
Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert




Posted By: oldspark
Date Posted: February 04, 2010 at 6:56 PM
As I said, a screw terminal joiner or other joiner, or wrap & solder (as far as I know).




Posted By: shafferny
Date Posted: February 05, 2010 at 6:13 AM

I like the screw terminal idea out of all of them. I see if I can find one. Thanks for the help.





Posted By: oldspark
Date Posted: February 05, 2010 at 7:43 AM
Excellent choice!

Below are 2 common ones that I use.

The BP types are aka "Acorns" and are usually used in AC mains situations and hence have largish holes. I like their twin screw versions for redundancy.
I usually use them as a cable end termination or for joining cables into "one end", though they can also be used as a through-connector buy filing the plastic end off - if it exists. (It's hard plastic - it shatters if cut.)
posted_image
(Thanks to Jaycar!)


The others are typical Terminal Strips that can be broken into singles etc and come in various sizes. Also often used in AC mains applications.
My last use was for my dual/aux battery installation where I used the biggest commonly available 60A rated terminal strip onto which I could mount a 50A circuit breaker.
I could also daisy-chain cable from one to another for individually terminated wires to the battery, or Anderson plugs, or other parallel connections (though this is usually done for the common negative aka ground connections).
You might daisy chain using wire or a paper clip segment etc for easy individual termination of wires, though be careful if too thin wires strands that break easily, or worse still, wiggle into the gaps next to the screws and pull out it your are lucky, else form a bad contact that overheats etc. IE - it's better to twist smaller wires to fill the terminal-strip's conductor hole for a good solid and tight termination.   
posted_image
(Again, Thanks to Jaycar!)


I use a plug/socket version of the above terminal strips for my car speakers.
IE - under my seats, I use them as a quick-disconnect for the headrest-internal speakers, as well as being able to easily change phasing or impedance (ie, series or parallel as the rear speakers).

And unless rigidly mounted to something (ha! they are almost always floating!) I will usually run electrical tap around their plastic top & bottom to ensure no extrusions or hair or nose clips can short a screw terminal to something.
The wires themselves should only be bared for the terminal sleeve.
If the wire conductors are thin enough, I strip them full sleeve length so each and overlaps and has 2 screws. Otherwise it's only 1/2-sleeved bared and only gets one screw. (But I might fled the wire end for extra grip thickness.)

And if breaking of to whatever length, I will usually allow a couple as spare, and often leave an empty between +ve & ground sides.

And ALWAYS tighten the screws in the empty ones - those bricks escape that first chance they get!
[Question - what are the chances an escaping screw happens to wedge between 2 exposed conductors? ((Ans: IMO, the probability is 1; nothing less!)) ]

And with any screw terminal - as with hose clamps etc - check them now and again for loosening - whether shrunk rubber hoses, or conductors suffering plastic (LOL!) deformation, or screws simply backing off.


Geez, that's a long "congratulations" on an a excellent choice!

I was only going to add that maybe someone will yet suggest some beautiful looking connector....




Posted By: shafferny
Date Posted: February 06, 2010 at 5:02 PM

Well.....don't be congratulating me on my choice just yet. lol  

When you said "screw terminal", I was thinking something like a screw terminal block, like one of those you stipes of screw you can attach wires too. I wasn't thinking what you have pictured there. I've never see those before.

This is excatly why I asked. I was wondering if there was something out there that I just didn't know aobut.

The screw terminal you have pictures look very simple in design, yet effective. Interesting.





Posted By: jetblue
Date Posted: February 07, 2010 at 9:40 PM

Shafferny, good news for you (I think).  I was looking for something similar as well and happened to find something at Lowes that should work for me and you as well.  I found them in the electrical supply aisle and they are called Push-In Connectors and they are made by Ideal Industries

posted_image

I picked up a variety 10 pack that handles 12-18 gauge wire and has two each of 2, 3, 4 & 5 hole connectors.  I like that you can use a jewelers screwdriver to unsnap the plastic covers on these and help get the wires neatly seated (especially the smaller wires that tend to bend and crumple rather than push in nicely).  I plan on going through the extra step of adding solder inside the metal pieces that hold the wires to ensure a good connection.  Snap the plastic shell back on and you're good to go.  Their only downfall is that they don't have an attachment point to screw them into a spot under the dash or wherever you want them.  A good drop of epoxy or superglue ought to help out with that.

Good luck.



-------------
=\
-------
=/





Print Page | Close Window