Wire Gauge

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American wire gauge [1] basically tells you how thick a cable is. Most wires will have the wire gauge printed on them. The lower the number, the thicker the cable. A thicker cable has less resistance, and thus will have a lower voltage-drop.

Factors in voltage drop are Length and Amperages, i.e how much power the PCB draws.

Voltage drop Calculator

AWG 22

Used for control-panel wiring.

AWG 20

Used on some Jamma Harnesses for both power and controls, and the thinner cables on an ATX psu.

AWG 18

Used to power the Naomi PCB, and ATX psu's.

22 AWG wiring and AMP UP connectors