Case fan wire melt affect other components

ChariotsChariots

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Oct 27, 2013
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I was adding a Bitfenix pro to the side of my build to cool it. I plugged the fan power into a 3-pin to molex connector that came with it. The second tiny cable, labled FAN LED puzzled me. Bitfenix's site said to plug it into a standard 3-pin fan power connector.

http://www.bitfenix.com/global/en/forums/3,tech-talk/687,spectre-pro-led-fan-andamp-led-connection-question/

So I did... and when I turned the computer on, the cable melted in a puff of smoke.

Now, obviously, this was either a voltage or polarity problem, but my question is this: What are the chances that the wire melt on that cable affected the rest of the system.

Apologies in advance if this is a stupid/basic electrical question. I just want to know if I can turn my PC back on. (with the fan unplugged of course.)
 
You have two types of connections in a molex plug.

Or two voltages. One is a 12v feed for 12v fans yellow and black.
And a 5v feed red and black.

If you connect the 5v adaptor to a 12v rated fan the cable will melt because it cannot cope with the amount of voltage sent down the wire. Devices draw electricity.

That is why wires are thicker than others and rated on a AWG rating. Gage or thickness to handle higher current so the wire does not heat up and melt the plastic covering the copper cable inside it for insulation. A thinner core of wire produces more electrical resistance and heats up. The electrons can not flow as quickly through them causing heating. Bunching up.

Think of it like a small water pipe, and a large water pipe. the fatter the pipe the more water you can pass through it. Its the same for wires only it`s in respect to the voltage.
Current and amps.
 

ChariotsChariots

Honorable
Oct 27, 2013
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10,510
Thanks Shaun o, but my question was more along the lines of "is it likely that this fan wire overload fried another part of the system?" Or would it likely be localized to the burnt fan wire?