Contents

Introduction of Electrical Design Sizing Calculation

Basic Requirements for Electrical Calculations

Basic Electrical Engineering Formulas          

List of Electrical Engineering Symbols

Direct Current (DC) Formulas           

Alternating Current (AC) Single Phase

Alternating Current (AC), Three-Phase

Motors           

 Power Factor Improvement & Correction

Sample Calculations

Short Circuit Calculation

Power Factor Improvement Reactive Compensation

Capacitive  Load Calculation

Transformer Load Loss Calculation

Capacitor Bank Calculation

Transformer Size and Load Calculation

Power Factor Table Calculator

Bus Bar Size Calculation

Power Calculation

Load

Generator Sizing

Conductor Size, General

Conduit Size and Fill

Motor Branch Circuit

Power Factor Correction Capacitors

Transformer Primary and Secondary Conductors

Voltage Drop

Short Circuit

Lighting

Grounding

Cable Pulling Tension

Equipment Heat Loads

List of Examples

Example 1 Motors

Example 2 Conductor Size No. 1

Example 3 Conductor Size No. 2

Example 4 Conductor Size No. 3

Example 5 Conductor Size No. 3            

Example 6 Conduit Size 01

Example 7 Conduit Size 02

Example 8 Motor Branch Circuit 01

Example 9 Motor Branch Circuit 02

Example 10 Power Factor 

Example 11 Power Factor Correction Capacitor 

Example 12 Transformer Primary and Secondary Conductors 01

Example 13 Transformer Primary and Secondary Conductors 02

Example 14 Transformer Primary and Secondary Conductors 03

Example 15 Feeder and Branch Circuits

Example 16 Short Circuit

Example 17 Lighting No 1: Lumen or Zonal Cavity Method