DEC standard power wire colour coding

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DEC PDP-11's generally use a common system of colours in the power harness which leads from the power supply to the backplanes, etc.

It is:

Line Colour
+20V Orange
+15V Grey
+15B White
+5V Red
+5B Red/white stripe
Ground Black
-5V Brown
-15V Blue
-15B Green
ACLO Yellow
DCLO Purple
LTC Brown