electrical - Is white wire with grey stripes positive or negative

I want to re-wire an AC to DC power adapter for an ONT (Optical Network Terminal - AKA Fibre Box mounted on a wall) and replace the adapter with a standard DC plug. This is because I want to connec

Stripes on one side of an electrical cord. Smooth on the other. Which is positive? - Quora

When a USB Samsung cord only has white and red wire, which one is positive and negative? - Quora

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When a USB Samsung cord only has white, green, and red, which is the positive and negative? - Quora

ABYC Cable & Wire Color Codes for Boat & Marine Wiring

Which wire is negative on this PC fan? - Electrical Engineering Stack Exchange

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