Electrical Installation Mathematics
2 - Mathematic Principles
3 - Resistors in Series
Volts = V
Ohms = R
Amperes = I
Volts = V
Watts = P
Amperes = I
4 - Resistors in Parallel
1/RT = (1/R1 + 1/R2 + 1/R3)
Find the common denominator for all the resistors, add them together and inverse the fraction
Resistors in parallel use Reciprocals
Turning a number into a fraction 5 = 1/5
P = I² x R
P / R = I²
Sine waves
RMS 0.707 x peak value
0.646 x Avg
14 - Basic Mechanics
Gravity = 9.81m/s2
Add them together
1 litre of Water Weighs 1kg
Mass(kg) x 9.81 = Force
Cable Selection
Energy Is the capacity for doing work. It may exist in in potential, kinetic, thermal, electrical, chemical, nuclear forms. The unit of energy is the newton metre or Joule
Force x Distance = Energy
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16 Levers
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