# Aplicacion formulas electricas

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Electrical Formulas APLICACION
Conversion Formulas
Area of Circle = πr2
Breakeven Dollars = Overhead Cost \$/Gross Profit %
Busbar Ampacity AL = 700A Sq. in. and CU = 1000A Sq. in.
Centimeters =Inches x 2.54
Inch = 0.0254 Meters
Inch = 2.54 Centimeters
Inch = 25.4 Millimeters
Kilometer = 0.6213 Miles
Length of Coiled Wire = Diameter of Coil (average) x Number of Coils x π
LightningDistance in Miles = Seconds between flash and thunder/4.68
Meter = 39.37 Inches
Mile = 5280 ft, 1760 yards, 1609 meters, 1.609 km
Millimeter = 0.03937 Inch
Selling Price = Estimated Cost \$/(1 -Gross Profit %)
Speed of Sound (Sea Level) = 1128 fps or 769 mph
Temp C = (Temp F - 32)/1.8
Temp F = (Temp C x 1.8) + 32
Yard = 0.9144 Meters

Electrical Formulas Based on 60 Hz
CapacitiveReactance (XC) in Ohms = 1/(2π f C)
Effective (RMS) AC Amperes = Peak Amperes x 0.707
Effective (RMS) AC Volts = Peak Volts x 0.707
Efficiency (percent) = Output/Input x 100
Efficiency = Output/InputHorsepower = Output Watts/746
Inductive Reactance (XL) in Ohms = 2π f L
Input = Output/Efficiency
Neutral Current (Wye) = [pic]
Output = Input x Efficiency
Peak AC Volts = Effective (RMS) AC Volts x[pic]
Peak Amperes = Effective (RMS) Amperes x [pic]
Power Factor (PF) = Watts/VA
VA (apparent power) = Volts x Ampere or Watts/Power Factor
VA 1-Phase = Volts x Amperes
VA 3-Phase = Volts xAmperes x [pic]
Watts (real power) Single-Phase = Volts x Amperes x Power Factor
Watts (real power) Three-Phase = Volts x Amperes x Power Factor x [pic]
Parallel Circuits
Note 1: Total resistance isalways less than the smallest resistor
RT = 1/(1/R1 + 1/R2 + 1/R3 +...)
Note 2: Total current is equal to the sum of the currents of all parallel resistors
Note 3: Total power is equal to the sumof power of all parallel resistors
Note 4: Voltage is the same across each of the parallel resistors

Series Circuits
Note 1: Total resistance is equal to the sum of all the resistors
Note 2:...