Voltage Drop For Instrument Cable

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VOLTAGE DROP CALCULATOR FOR INSTRUMENT CABLE This spreadsheet calculates the approximate voltage drop at 20 mA, 350 mA, and 1/2A for various sized instrument cables. The only user input in in cell f5. Set Cable Length

250

meters

mm2

AWG

Ω/meter (approx)

Length (m)

R (Ω)

ΔE (V) for I=20mA

ΔE (V) for I=350mA

ΔE (V) for I=500mA

1.650 1.310 1.040 0.823 0.653 0.518 0.410 0.326 0.258 0.205 0.162 0.129 0.102 0.081

15 16 17 18 19 20 21 22 23 24 25 26 27 28

0.010 0.013 0.017 0.020 0.027 0.033 0.040 0.053 0.067 0.080 0.107 0.133 0.160 0.213

250 250 250 250 250 250 250 250 250 250 250 250 250 250

2.5 3.3 4.2 5.0 6.7 8.3 10.0 13.3 16.7 20.0 26.7 33.3 40.0 53.3

0.05 0.07 0.08 0.10 0.13 0.17 0.20 0.27 0.33 0.40 0.53 0.67 0.80 1.07

0.88 1.17 1.46 1.75 2.33 2.92 3.50 4.67 5.83 7.00 9.33 11.67 14.00 18.67

1.25 1.67 2.08 2.50 3.33 4.17 5.00 6.67 8.33 10.00 13.33 16.67 20.00 26.67

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