# Electrical Formulas

### Electrical Formulae

Electrical Formulas Electrical Formulas. 399 www.emersonct.com 800-893-2321 Symbols & Formulae Electrical Formulae Electrical Quantities Quantity Symbol Unit NameUnit Symbol Electromotive force E, e* Volt V Potential difference V, v* Volt V Current I, i* Ampere A Magnetic fl ux Φ Weber Weber ...

### Electrical Formulas

Order Mike's Illustrated Formula book for details, visit www.NECCode.com or call 1.888.NEC.Code. Series Circuits Note 1: Total resistance is equal to the sum of all the resistors Note 2: Current in the circuit remains the same through all the resistors Note 3: Voltage source is equal to the sum ...

### Electrical Formulas

Electrical Formulas. Electrical Formulas To Find Direct Current Alternating Current Single Phase Two-Phase* Four-Wire Three Phase Amperes when Horsepower is known HP x 746 E x EFF HP x 746 E x EFF x PF x 2 HP x 746 2 x E x EFF x PF HP x 746 E x EFF x PF x 1.73 Amperes when Kilowatts are known KW ...

### Electrical Engineering Formulas

/2 Notes: R- electrical resistance in ohms, L- inductance in henrys, C- capacitance in farads, f - frequency in hertz, t- time in seconds, π≈3.14159;

### Electrical Formula's

Electrical Formula's Disclaimer ***USE THIS MATERIAL AT YOUR OWN RISK*** Although much time and effort has been given in order to compile these common electrical formulas, we cannot guarantee their accuracy or assume any liability for those who use them.

### CHAPTER 1 ELECTRICAL FORMULAS

Ohm's law and the power formula are limited to circuits in which electrical resistance is the only significant opposition to current flow including all DC circuits and AC circuits that do not contain a significant amount of inductance and/or capacitance.

### Capacitive Reactance (X

Order Mike’s Illustrated Formula book for details, visit www.NECC ode.com or call 1.888.NEC.Code. Electrical Formulas Conversion Formulas

### Electric Power Formulas

Common electrical units used in formulas and equations are: • Volts - The units of electrical potential or motive force. The force is required to send one ampere of current through one ohm of resistance.

### The Primary Forces

6 Electrical Laws Fig. 1-3 The 12 Watt's Law formulas. Reactance Reactance is the part of total resistance that appears in alternating current circuits only.

### Formula Sheet - Electric Power Systems

Electric Power Systems - Formula Sheet Formula Sheet - Electric Power Systems The allowed tools at the exam are: this formula sheet, TEFYMA (or equivalent) and a pocket calculator.           =           2 1 0 where ...