Lighting & ELECTRICITY CALCULATORS
Voltage Drop Calculation
In Metric Size Cables
Instructions - Enter your settings in the grey boxes.
Copper
The Resistivity of Copper at 50 degrees Celsius (Ohm cm) = 0.000001858
The Resistivity of Copper at 40 degrees Celsius (Ohm cm) = 0.000001804
The Resistivity of Copper at 35 degrees Celsius (Ohm cm) = 0.000001775
The Resistivity of Copper at 30 degrees Celsius (Ohm cm) = 0.000001745
The Resistivity of Copper at 25 degrees Celsius (Ohm cm) = 0.000001713
The Resistivity of Copper at 20 degrees Celsius (Ohm cm) = 0.0000017
The Resistivity of Copper at 15 degrees Celsius (Ohm cm) = 0.000001644
The Resistivity of Copper at 10 degrees Celsius (Ohm cm) = 0.000001609
The Resistivity of Copper at 5 degrees Celsius (Ohm cm) = 0.000001575
The Resistivity of Copper at 0 degrees Celsius (Ohm cm) = 0.000001544
The Resistivity of Copper at -5 degrees Celsius (Ohm cm) = 0.00000151
The Resistivity of Copper at -10 degrees Celsius (Ohm cm) = 0.000001477
The Resistivity of Copper at -15 degrees Celsius (Ohm cm)
The Resistivity of Copper at -20 degrees Celsius (Ohm cm)
The Resistivity of Copper at -30 degrees Celsius (Ohm cm) = 0.000001342
The Resistivity of Copper at -40 degrees Celsius (Ohm cm)
The Resistivity of Copper at -50 degrees Celsius (Ohm cm)
* This calculator will not work for extremely long cable lengths.
** Results may change with real wires: different resistivity of material and number of strands in wire
MIRED SHIFT CALCULATOR
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Comparative Scene Illumination
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If at 15 metres from your light source your getting a reading of 500 Lux, what will be the new reading at 20 metres be?
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