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How can i tell which wire is the ground wire?

post #1 of 6
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Ok guys, so whilst unhooking the front panel of my case from the mobo, i am making sure i follow the mobo manual and take pics just in case i dont remember. Anyway, i have taken the "RESET SW" off and reading the manual it states which way to put it on....it is a two wire jumper and it has to go the right way so the reset and ground wire are on the correct pins. One wire is blue, the other is white. How do you know which one is the ground? Is the blue one ground? Also, on another one the two wires are orange and white. So im not sure whether or not to assume that the coloured wires are all ground or not?

Thanks guys smile.gif
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post #2 of 6
It doesn't matter.
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post #3 of 6
When you power on/reset your system you're merely triggering a push-button switch that shorts the connections between the two pins
The guy above me is right

Also, for reference black is almost always ground
post #4 of 6
White wire would be the common/ground. Colored would be the positive. And as for the board, well its on the manual for sure..

And yes on reset/power it doesn't matter biggrin.gif
post #5 of 6
The switch wires do not have to be on a specific polarity. They will work fine either way they are wired, you just need to make sure you have the correct two header pins. The HD LED and Power LED are different though. They must be wired with the correct polarity due to the fact that LEDs are Diodes and electricity will only flow in one direction.If you have LED wires that you are unsure of, try them one way and if they don't work, try the other. It sounds like you are only dealing with the switch wires, so you are fine either way they go on (to the correct two pins).
    
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post #6 of 6
In most* computer cases, the white wire is the ground wire, although because of the fact that, as mentioned above, all the 2 wires really do is connect together to short out the pins on the motherboard when you press the switch, it's not really a ground wire at all. So, it doesn't really matter how you connect it.

Also, in terms of wiring in general, there is no standard. Black does not ever HAVE to be ground, and red doesn't ever HAVE to be hot. I've done wiring in robotics applications where hot is light blue and ground is grey.
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