[Al Skierkiewicz]

Argue????? Me???
I cannot speak to 2017 rules other than to remind everyone that the wire color codes have changed very little in decades. The colors are chosen from the NEC and other worldwide standards for low voltage DC wiring.
To go a step further, to be "steam punk", electrics would need to be powered from a steam turbine operated dynamo but electric wiring would still be required to follow all rules as they would apply. As to the steam powered dynamo, I would look carefully at whatever rules would replace or supplement 2016 rules R1, R31, R35, R36, R38, and the entire pneumatic section.
Just saying...