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Old October 29th, 2002, 09:41 AM   #1
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TimothyMoulder is offline
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Join Date: Apr 2002
Location: Just a bit northeast of nowhere
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Talking Color Code Application

So here's a little one for your consideration:

I have a 24 VDC system, with blue wire for +24 VDC and white-with-blue-stripe for 0 VDC

I have a sourcing input tied to a momentary pushbutton.

Wire-A goes from the input to one side of the PB

Wire-B goes from the other side of the PB to 0 VDC

Now the question : what colors should A and B be?

It may be argued that the input is a "24VDC Source), and A should be blue. Since B is tied to 0VDC, it should be white-blue

It may also be argued that the switch is transmitting 0VDC to the input, so both wires should be white-blue.

Finally, since this is a DC input circuit, there is an arguement that both wires should be blue, and white-blue should be reserved for dedicated power connections.

This one has me stumped. Any ideas?

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