[HCARC] 12 Volt vs Wire Size Website

curtiswe at ktc.com curtiswe at ktc.com
Wed Sep 19 15:26:12 EDT 2012


When in doubt, over-build. No harm in using a bigger wire for DC if physically possible.
Sent from my BlackBerry® Smartphone by WCW

-----Original Message-----
From: "Gary and Arlene Johnson" <qltfnish at omniglobal.net>
Date: Wed, 19 Sep 2012 14:05:25 
To: <curtiswe at ktc.com>
Cc: <hcarc at mailman.qth.net>
Subject: Re: [HCARC] 12 Volt vs Wire Size Website

Curtis,

The website I gave the link to on the first email on this subject has a 
chart that tells number of feet of wire vs wire size vs amperage.  They only 
list up to 25 feet (12.5 feet for each leg).

I haven't finished looking because in electricity I have always worked under 
the premise that within reason the bigger the wire the better.  Not only 
that, but I already have the 6 gauge wire, and would need to purchase the 10 
gauge.  Being cheap, I would rather use what I already have.

Gary J
N5"BAA"
----- Original Message ----- 
From: <curtiswe at ktc.com>
To: "Gary and Arlene Johnson" <qltfnish at omniglobal.net>; 
<hcarc-bounces at mailman.qth.net>; "William Morgan" 
<billmorgan000 at hotmail.com>
Cc: "Hcarc reflector" <hcarc at mailman.qth.net>
Sent: Wednesday, September 19, 2012 1:04 PM
Subject: Re: [HCARC] 12 Volt vs Wire Size Website


> Hi Gary, when picking a wire size, look at how long it will be. At 20 amps 
> voltage drop will be a consideration. The longer the run, the larger wire 
> you will want. I don't have my reference material here in the office so I 
> can't quote" resistance per foot"  numbers on wire sizes but it is worth 
> investigating.
> Sent from my BlackBerry® Smartphone by WCW
>
> -----Original Message-----
> From: "Gary and Arlene Johnson" <qltfnish at omniglobal.net>
> Sender: hcarc-bounces at mailman.qth.net
> Date: Wed, 19 Sep 2012 12:43:58
> To: William Morgan<billmorgan000 at hotmail.com>
> Cc: <hcarc at mailman.qth.net>
> Subject: Re: [HCARC] 12 Volt vs Wire Size Website
>
> Bill,  They have the fuse blocks in question at Rat Shack, but they for 
> some reason don't have 25 amp (the closest to my radio max amp requirement 
> of 20 amps) and all the fuses say they are for a 32 volt system at XX 
> amps.  I guess I should check to see if one of the smaller 12 volt fuses 
> will make contact in the holder - the 32 volt fuses are longer, but maybe 
> the fuse holder can be made shorter.  I noticed the ends screw in to put 
> the fuse in the holder, so maybe they will screw far enough in to hold the 
> 12 volt fuse.
>  ----- Original Message ----- 
>  From: William Morgan
>  To: qltfnish at omniglobal.net
>  Sent: Wednesday, September 19, 2012 10:46 AM
>  Subject: RE: [HCARC] 12 Volt vs Wire Size Website
>
>
>  Hi:
>   Before giving up on the 6 gauge wire, look into the fuses used by high 
> power audio. They use up to 4 gauge wire, the fuses are blocks that are 
> screwed down and a set screw to hold the wire. Also, they hace 0.5 
> F(500,000 microF) caps. I have seen these at the audio dept. at Walmart 
> and some auto part houses.
>                    Bill KA5ONN
>
>
>  > From: qltfnish at omniglobal.net
>  > To: hcarc at mailman.qth.net
>  > Date: Wed, 19 Sep 2012 10:26:14 -0500
>  > Subject: [HCARC] 12 Volt vs Wire Size Website
>  >
>  > http://www.offroaders.com/tech/12-volt-wire-gauge-amps.htm
>  >
>  > As many of you know, I have been planning to run my new K3 off of 
> battery power in order to become proficient at it so I can run a "Green 
> Power" station at the next Field Day. I have been looking for fuses and 
> fuse holders in a large enough size to wire the station using 6 gauge wire 
> that I have plenty of. I have not been able to find the fuse holders 
> capable of being wired into a 6 guage wire system. My next thought was - 
> how much overkill am I working with by going to 6 gauge wire?? I found 
> this website that tells me I am overkilling the wire requirement by a lot. 
> This website says I can safely use 10 gauge wire for 20 amps up to a 25 
> foot run. That solves the problem as long as I am electrically safe, and 
> fuse holders with 10 gauge wire leads are easily found.
>  >
>  > Gary J
>  > N5"BAA"
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