<R81>:
Quote:
All wires distributing power with a constant polarity (i.e., except for Relay Module, Speed Controller, or sensor outputs) must be color-coded as follows:- Use Red, White, or Brown wire for +12 Vdc and +5 Vdc connections.
- Use Black or Blue wire for Common (-) connections.
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The rule says "must", not "should". However, it's not explicit about about the entire wire being of the specified color, so maybe your heat shrink at the ends will count as making it "color-coded". I don't know how flexible inspectors will be about it.