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PSU Cable Wire & Sleeving Stuff

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loganloganlo

New Member
Joined
Dec 19, 2018
I'm using 16AWG wire, I've looked around to find the best prices and haven't found anything yet.

I know that you can buy it from PC websites, but I want to find cheaper prices with the same quality.

Here's the Terminals I'm using

Molex
39-00-0081 (Male)
39-00-0077 (Female)

Where's everyone getting theirs from? Also will 300v or 600v be better?


These are what I've found so far for 600v. (I know that the Outer Diameter varies a lot, and smaller is easier to use.)

https://www.amazon.com/dp/B000NUYFV...olid=1MCJVSP4YL0U6&psc=0&ref_=lv_ov_lig_dp_it

https://www.amazon.com/dp/B00T65T79...olid=1MCJVSP4YL0U6&psc=0&ref_=lv_ov_lig_dp_it

https://www.ebay.com/itm/100ft-16aw...6:g:mFkAAOSwKM1b6hkw:rk:7:pf:1&frcectupt=true

https://www.ebay.com/itm/16-GAUGE-W...=item43fec7b583:g:bR8AAOSwEzxYdn7E:rk:24:pf:0

Are any of these good?
 
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Johan45

Benching Team Leader Super Moderator
Joined
Dec 19, 2012
Why wouldn't you just use the original wiring from the PSU and just sleeve it?
 
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loganloganlo

New Member
Joined
Dec 19, 2018
Why wouldn't you just use the original wiring from the PSU and just sleeve it?

I want to make the cords set up right where I need them, with just a little extra to use cable combs on.

Most of the cables that come with the PSU, have quite a lot of extra cable. Although, I could probably just use those and cut/crimp them shorter.

But if I need to make cable management nicer and route them a little longer way, I'd have to make them by scratch.
 

Johan45

Benching Team Leader Super Moderator
Joined
Dec 19, 2012
Then any decent wire would work, I would check that some of the power wires aren't heavier like 14 AWG. I do know that not all the wires are the same gauge with all PSUs
 
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loganloganlo

New Member
Joined
Dec 19, 2018
Then any decent wire would work, I would check that some of the power wires aren't heavier like 14 AWG. I do know that not all the wires are the same gauge with all PSUs

I'm using a 750 watt PSU, so 16AWG is safe. As for 600v, 300v wire, or lower I'm not sure the cheap/safe voltage to get.

Most 600-800 PSUs use +12v, and I remember reading that they hardly ever draw more than 100v in a single wire. So 600v is over kill, and 300v is more than enough.

EDIT**

Using a calculator I figured this out

750W / 12A = 62.5v

So that would mean the wires never go over 100v maximum on the wire.

Can anyone confirm this, or correct me if I'm wrong?
 

pqwoerituytruei

Member
Joined
Nov 24, 2011
For 20 AWG and larger you can usually find stuff at auto supply stores, this may be cheaper than buying a 100+ft rolls on amazon if you do not need alot of wire
for sleeving i use some cheap sleeving i found on ebay and heat shrink it using some marine grade stuff i got at harbor freight for around $5
 
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loganloganlo

New Member
Joined
Dec 19, 2018
Never heard back on this, hopefully someone can confirm this? Still looking at wire so I can redo my PSU cords for sleeving.
 

pqwoerituytruei

Member
Joined
Nov 24, 2011
I have not used 16AWG. but i have used 18AWG for the 4 pin molex plugs and sata power plugs
i used wire i got at the local napa store, https://www.napaonline.com/en/p/BEL785300 they also sell 16 awg by the foot if you do not need much

You could use a tool to take apart your existing wires and sleeve them: https://www.ebay.com/itm/201512474090

If you are using a 6pin from your psu to your gpu, no spliters or anything you have 3 +12v and 3 ground wires a 6pin is rated for 75W, this is 6 amps, 6 amps over 3 wires would be 2A each even 22AWG can handle that within spec if the wire is 2ft long stranded copper
a nvidia GPU with a 6pin will allow a max power of 140W, both the PCIe slot and the 6pin are rated at 75W each (150W total)
now if you are doing shut mods to get more power i would not suggest going smaller than 18awg for vdrop concerns
 
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loganloganlo

New Member
Joined
Dec 19, 2018
Thanks, I plan on going with just straight 16AWG wire from PSU to Motherboard, with using cable routing like this video.


That wire doesn't look like something I should use, even at 16AWG since I can't find the specs. UL1007 at least, plus tinned hookup wire is the safest.

The last thing I want is power problems, or worse a fire, I'm just unsure of what the safest 300v or 600v would be. One's easy to find, the other cost a lot more
 

pqwoerituytruei

Member
Joined
Nov 24, 2011
also you seemed concerned about the voltage earlier, I am not sure how you got a 60+v calculation
DC power supply circuits use capacitors to smooth out spikes and dips, the same rating for a cap in this use is 1.5x the voltage you are using, the highest voltage a standard ATX psu uses is 12v, so you do not need to worry about anything over 18v for spikes, and if you do get spikes that high your power supply needs replacing assuming it has not killed parts at this point

the only way you will have problems if if you wire your cables wrong like run a +12v from the PSU into a +5 or +3.3 on the motherboard/HDD/SSD/DVD
by problems i mean dead hardware, double check your wires compared to the original ones with a multi meter to be sure the wires go the same place
If your run your +12 to ground you will trip short circuit protection which any reputable PSU will have your hardware will be fine, but you then have to find the problem

if you use a wire that is too thin and it has a short where the wire can not handle the amps to trigger short circuit protection you can start a small fire, normally the wire will just burn up, i managed to do this with some LED strip wire that i guess shorted when when insulation melted and the wires made contact when using heat shrink, that or it was just really bad insulation on the wires
if you smell something cut the PSU off and investigate