The first table in combination with the second table offer a good start for selecting a wire gauge for data exchange.
As indicated 24 AWG is one of the standard wire sizes used to transfer data. This link provides a graph of 24 gauge twisted pair wire;
24AWG Frequency vs Attenuation in dB/meters.
So the table provide DC resistance and the link provides AC resistance [for 24 gauge wire].
Which leads to the two reasons to select the correct gauge wire; resistance or Wire Current carrying capacities .
Data or signaling use resistance per gauge, while power lines use Current carrying ability.
Speaker wire is normally around 16AWG [16-Gauge], also 18-gauge and 14-gauge are common.
Step 1: Find the Wire Resistances Units of Measure All lengths in Feet Meters All resistance values in ohms All wire gauges are AWG All wire is copper Your Fixturing The wire from tester to: Point A: Length Gauge 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ___ ohms Point B: Length Gauge 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ___ ohms Contact resistance from fixture to DUT: At Point A: ohms ___ ohms At Point B: ohms ___ ohms Your Device Under Test Wire in DUT: Length Gauge 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 ___ ohms Wire Resistance Results Expected resistance of:
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