Dan Berens
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Exposure
Lighting & Electricity
Optics
Tables

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!)

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

Mired_Shift_Gel_and_Camera_Filter_Tables.pdf
File Size: 251 kb
File Type: pdf
Download File


Comparative Scene Illumination

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?

Light Coverage Calculators

Beam with given beam angle and Distance

​Distance Given Beam Width and Beam Angle

​Beam Angle Given Beam Width and Distance

© 2014 Daniel Berens
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