# EC&Ms Electrical Calculations Handbook

McGraw Hill Professional, 15 déc. 2000 - 435 pages
The most frequently used electrical calculations--worked out in an instant-access format Edited by John Paschal, EC;M’s Electrical Calculations Handbook brings you the expertise of two of the industry's most respected names: McGraw-Hill and EC;M (Electrical Construction ; Maintenance) Magazine--the premiere magazine for electrical design, construction, and maintenance. This handy guide packs all the essential calculations every electrical professional needs to properly design, install, and maintain electrical equipment, from wiring and circuits, to batteries and generators. You get basic electrical working definitions and concepts, and coverage of three-phase systems; math for electrical calculations, power factor correction, and calculations for harmonics; conductors; short-circuit calculations; grounding; lighting; transformers; motors; raceways; overcurrent devices; circuits for special loads; electrical design and layout calculations; electrical cost estimating; and conversion calculations.

### Table des matières

 Basic Electrical Working Definitions and Concepts 1 ThreePhase Systems 55 Mathematics for Electrical Calculations 69 Solving for Current and Power Factor in an ac Circuit 75 Power Factor Correction to Normal Limits 87 Power Factor Correction System Design in an Electrical Power 93 System Containing Harmonics 104 Acceptable Levels of Harmonic Current and Voltage 110
 Grounding 205 Lighting 221 Transformers 251 Motors 285 Raceways 311 Overcurrent Devices 319 Circuits for Special Loads 335 Electrical Design and Layout Calculations 357

 Effects of Harmonic Voltage on Motors 116 Harmonics Symptoms Causes and Remedies 122 Calculating the Impedance of a Cable 133 ShortCircuit Calculations 179 Generator Sizing Calculations 195
 Electrical Cost Estimating 371 5 Conversion Calculations 425 7 Index 433 Droits d'auteur

### Fréquemment cités

Page 10 - The end of one year is the beginning of the next year. • P is at the beginning of a year at a
Page 4 - voltage of the battery is equal to the sum of the voltages of the individual cells
Page 3 - the single future value that would accumulate from a series of equal payments occurring at the end of succeeding annual interest periods The
Page 168 - Allowable Ampacities of Single-Insulated Conductors Rated 0 through 2000 Volts in Free Air, Based on Ambient Air
Page 319 - is equal to the square of the current multiplied by the resistance, the
Page 271 - single overcurrent device. If both circuit breakers and fuses are used as the overcurrent device, the total of the device ratings must not exceed that allowed for fuses.
Page 108 - by the square root of the sum of the squares of these
Page 165 - there are more than three currentcarrying conductors in a raceway or cable.
Page 163 - where I is the current in amperes and R is the resistance of the
Page 283 - consists of a structure of steel laminations mounted on a shaft. Embedded in the rotor is the rotor winding, which is a series of copper or aluminum bars that are all short-circuited at each end by a metallic end

### Références à ce livre

 Standard Handbook for Electrical EngineersAffichage d'extraits - 2006