This is sort of a rant...
Some time ago, the ABYC standards people designated yellow as the "new black" for color coding DC negative (-) wiring. That is, the negative leads of DC wiring should be coded yellow. The purpose is to eliminate confusion with the 'hot' side AC wiring (black).
So, you can get all sorts of wire sizes jacketed in yellow and many other colors. There is even duplex wire with red and yellow leads intended for DC wiring.
What is missing is YELLOW HEATSHRINK! While there are plenty of different sizes of black, red and white heatshrink (1/2, 3/8, 1/4 inch), I have found only one size of yellow heatshrink, 3/4 inch diameter. This is the right size for 1/0 battery cable or larger, but it is too big for smaller wire.
While I am using yellow wire, it would be nice to have matching heatshrink color on the terminal ends, no?
Or am I being too compulsive?
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