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)
Silver:
The Resistivity of Silver at 20 degrees Celsius (Ohm cm) = 0.0000016
Gold:
The Resistivity of Gold at 20 degrees Celsius (Ohm cm) = 0.0000022
* 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
Moblie Generator Altitude Power Rating Factor (NOT WORKING YET!)
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These apply to altitudes up to 2500m.
Above these altitudes the generator manufacturer should be consulted. The efficiency of an alternator or generator driven by an internal combustion engine diminishes with altitude. Experience has shown this loss to be 3.5% for every 310 metres above 150 metres for normally aspirated engines, 2.5% for turbocharged engines (with or without an air cooler). |
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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