[Boatanchors] A question about "parallel" wires (I.E. Wire AWGequivalents)

[Dave Brown]

Phil
In the absence of any skin effect issues, with your proposal you'll get 4 
times the original cross area-so if you start with 14g -which is 2.08sq mm 
cross area- then 4 parallel runs give you 4 times that or 8.32 sq mm- near 
enuff to 8g in my book. To get to the same cross area as 4g (21.14 sq mm) 
you need 21.14/2.08 or 10.16 parallel 14g runs - rounded down, 10 in 
parallel would be near enough. But this is not very practical-just get some 
4g cable.
Here's a table that you might find useful-
http://www.engineeringtoolbox.com/awg-wire-gauge-d_731.html
DaveB. NZ


--- Original Message ----- 
From: "Phil" <ko6bb1 at gmail.com>
To: "Boatanchors" <boatanchors at mailman.qth.net>
Sent: Thursday, June 23, 2016 11:46 AM
Subject: [Boatanchors] A question about "parallel" wires (I.E. Wire 
AWGequivalents)


> Hi All,
>
> Just repaired the first of two Astron 50 Amp power supplies and returned 
> it to the owner (he was VERY pleased with my work). He'll be bringing the 
> 2nd (metered) metered one by for it's repair/overhaul.  When it's 
> completed the first (unmetered) one will become mine and will be put in 
> where the present Astron RS-20M resides.
>
> I plan on doing some slight rewiring of the DC station battery 
> distribution when I install it.  The present wiring to the outdoor storage 
> shed (if I recall correctly) uses ~4ga wire in about an 8-10 foot run 
> between the batteries and the under-bench fuse block.  It 'looks' like the 
> cable from the Astron RS-20M may be the same, I can't measure it until I 
> pull the Astron.
>
> In other words I believe that the present wiring will handle the RS-50 
> just fine, but it's likely that I'll have to do some rewiring for the new 
> PS as I intend to put a heavy duty 'disconnect' switch in place, and 
> possibly some additional wiring.
>
> I'm a believer in 'overkill' in DC wiring, but have you checked out the 
> price of copper wire lately??
>
> I DO have about 130 feet (give or take) of stranded 14ga copper wire "zip 
> cord" (yes I measured the gauge) that is in an unused "trailer wiring 
> package" I bought at a Harbor Fright parking lot sale some time back (it 
> was MUCH cheaper than buying the wire on individual rolls).
>
> So this brings up the question.  How do you compute the equivalent wire 
> gauge of stranded wires in a parallel run (and soldered together at each 
> end).  That is, IF I use 4 14ga STRANDED wires in the same run, what have 
> I effectively used?  We're talking DC here, not RF with it's skin effect.
>
>
> -- 
>
> 73 From "The Beaconeer's Lair"
> Phil, KO6BB
> http://www.qsl.net/ko6bb/  (Web Page)
>
> HF/LF RADIOS:
> Grundigs: S-350 (~2006), G6 (2011) & S450DLX (2014).
> HOMEBREW: 7 Tube+Rect 1v3 Regenerative RX for LF (built 2015)
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> Icom:     R-75, Cascaded 250/125Hz CW-Filt, Panadapter. (~2009)
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>
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>        Behringer 1202fx Audio Mixer (for mixing/routing audio).
>
> ANTENNAS: 88 foot Long Ladder-line fed dipole, 35 feet AGL for MW/SW.
>           Active Mini-Whip, 36 Feet AGL for LF/MW/SW.
>           37 foot "Low Noise Vertical", 11 feet AGL for LF/MW/SW.
>
> Merced, Central California, 37, 18, 37N   120, 30, 6W CM97rh
>
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