Wire colour coding

[Guest]

I know this is the wrong place but ...... please help.......

On my hp casing, the wire colour codes
a/ the black wire and red wire - for Power
b/ the black wire and yellow wire for HD LED
C/ the green wire and the black wire for PLED
(on the hp mobo, it nevermention which is pin1 or pin 2)

and the manual for the new mobo, it says
HD (IDE hard disk active LED) Pin 1: LED anode (+)
Pin 2: LED Cathode (-)

PW (Power switch) Open: Normal
Close: Power ON/OFF

MSG (Message LED/Power/Sleep LED) Pin 1: anode (+)
Pin 2: cathode (-)

My questions are
a) how shall I connect the wires to the new mobo? There are markings on the
mobo but how do I know which wire is anode or cathode?
b) Are the cathode wires always black in colour?

c) on the PW, doesit matter which colour goes to which pin as long asitgoes
to the designated power pins?

Appreciate someone can help me out, many thanks

 

[Guest]

Forgot to add in the new mobo manual, and if I count correctly label as pin
6 (for PW+) and pin 8 (foe PW -)

Thanks

 

[Mac]

Not a clue- but try microsoft.public.windowsxp.hardware for a better chance
of help...

 

[Kerry Brown]

If the LEDs don't light up you have it backwards. The power switch will work
either way.

 

[V Green]

Not a clue- but try microsoft.public.windowsxp.hardware for a better chance
of help...

Power switch should not matter. However, if it doesn't work,
just reverse the connector (turn 180 deg. and reconnect).

LED's won't work if you hook them up backwards, and they won't
be damaged. Just turn the connector 180 deg. and reconnect if
they don't light up.

There is no consistency AT ALL for color coding of case wiring.
I think the manufacturers use whatever color wire they can get
a deal on on that particular day.

 

[Guest]

Many thanks for all your help. Its been sorted out and up and running like a
grand old lady with a new heart.

 

[Kerry Brown]

Your welcome

 

[Mike Fields]

Power switch should not matter. However, if it doesn't work,
just reverse the connector (turn 180 deg. and reconnect).

LED's won't work if you hook them up backwards, and they won't
be damaged. Just turn the connector 180 deg. and reconnect if
they don't light up.

There is no consistency AT ALL for color coding of case wiring.
I think the manufacturers use whatever color wire they can get
a deal on on that particular day.

Just as a "FYI" (at least here in the US), DC wiring usually uses
black wires for ground (earth), HOWEVER, AC wiring (houses
etc.) use the black wire for the HOT wire with the white wire
being "neutral" (nobody has ever been able to explain it - I suspect
it goes back to the "black" and "death" connection when electricity
was first coming into use). I have seen houses where the
home owner had made changes on their own and had used black
for the "ground" or "neutral" wire. Very dangerous.

mikey

 

[Jonny]

I know this is the wrong place but ...... please help.......

On my hp casing, the wire colour codes
a/ the black wire and red wire - for Power
b/ the black wire and yellow wire for HD LED
C/ the green wire and the black wire for PLED
(on the hp mobo, it nevermention which is pin1 or pin 2)

and the manual for the new mobo, it says
HD (IDE hard disk active LED) Pin 1: LED anode (+)
Pin 2: LED Cathode (-)

This is IDE activity LED. Connects to motherboard, not the ide HD as there
is no connection for that on the hard ide drive.

PW (Power switch) Open: Normal
Close: Power ON/OFF

MSG (Message LED/Power/Sleep LED) Pin 1: anode (+)
Pin 2: cathode (-)

My questions are
a) how shall I connect the wires to the new mobo? There are markings on
the
mobo but how do I know which wire is anode or cathode?

The black wire is usually always ground. Connect this to the negative (-)
side.

b) Are the cathode wires always black in colour?

No, they may be white if there is not black in the pair. A colored wire is
almost always carrying the voltage, not the ground. Black and white are not
considered a color in regards to this. Black is predominant to white for
ground when both are present.

c) on the PW, doesit matter which colour goes to which pin as long
asitgoes
to the designated power pins?

Power and reset switches. There is no polarity concern. Makes no
difference which wire is connected.