Wednesday, December 7, 2011

ELECTRICITY for the Trades

One of the books we recommend is Electricity for the Trades. This book is an excellent start to overview the basics needed for a career in the wind energy industry.

These are the chapters and subjects covered:

PART 1 FUNDAMENTALS OF ELECTRICITY

CHAPTER 1 SAFETY

Avoid electrical hazards in the workplace.
Identify the electrical factors that determine the severity of an electric shock.
List the general safety precautions that must be observed when working with electrical equipment.
Explain the purpose and process involved in grounding an electrical system.
Outline the basic steps in a lockout procedure.
Outline the first-aid procedures for bleeding, burns, and electric shock.
List the procedures to be followed in the case of an electrical fire.
Identify hazardous materials and describe their characteristics.
Be aware of the functions of the different organizations respondible for electrical codes and standards.


CHAPTER 2 INSTRUMENTS, TOOLS, AND FASTENERS

Identify and state the use for common electrical measuring devices.
Define the Measurement Categories I through IV.
Identify and state the use for common tools used in the electrical industry.
outline the procedure to be followed for the proper care and use of tools.
Identify and state the feature of common fastening devices.


CHAPTER 3 CONDUCTORS, SEMICONDUCTORS, AND INSULATORS

Describe the structure and electrical properties of an atom.
Explain the difference between conductors, insulators, anf semiconductors and compare their applications.
Explain how the ionization process produces positive and negative charges.
Define electricity in terms of electron flow.


CHAPTER 4 SOURCES AND CHARACTERISTICS OF ELECTRICITY

Define static and current electricity.
Explain how static positive and negative charges are produced.
State the law of electric charges.
Recognize the difference between Direct Current(DC) and Alternating Current(AC) electricity.
Be familiar with the basic sources of electricity and electrical devices used to convert the various energy forms.


CHAPTER 5 BASIC ELECRICAL UNITS

Define elecric current, voltage, resistance, power, energy, and list the unit of measurement of each.
Identify the essential parts of a circuit and state the purpose of each.
Explain the relationship among current, voltage, and resistance.
State the difference between electron flow and conventional current flow.
Make measurements of current, voltage, and resistance.


CHAPTER 6 ELECTRIC CONNECTIONS

Describe the negative effects of a poorly formed electric connection.
Properly remove insulation from a wire.
Correctly install terminal-screw, crimp-on, and mechanical connectors.
Properly insulate wire repairs.
Explain the principals of soldering.
Be familiar with the different ways in which cables are used in signal and communication circuits and power systems.


CHAPTER 7 SIMPLE, SERIES, AND PARALLEL CIRCUITS

Identify the basic components of a circuit and the symbols used to represent them.
Describe pictorial, schematic, wiring, block, and single-line diagrams.
Explain the operation of series and parallel connected loads and control devices.
Construct a circuit schematic from a set of written instructions.
Read and construct circuits from schematic diagrams.


CHAPTER 8 MEASURING VOLTAGE, CURRENT, AND RESISTANCE.

Compare the operation of analog and digital meters.
Correctly read an analog scale and digital meter display.
Use a multimeter to measure voltage, current, and resistance.
List the safety precautions to be observed when using multimeters.
Explain multimeter specificationd and special features.


CHAPTER 9 OHM'S LAW

Use prefixes to convert electrical quantities.
State Ohm's law and define the relationship between current, voltage, and resistance.
Use Ohm's law to solve for unknown quantities of current, resistance, or voltage.
Apply the power formula to calculate the power in a circuit.


CHAPTER 10 CIRCUIT CONDUCTORS AND WIRE SIZES

Identify uses for different conductor forms.
Properly select wire-insulating materials.
Compare the AWG size and diameter of conductors.
List the factors that determine a conductor's ampacity rating.
Identify the factors that contribute to the resistance value of a conductor.
Calculate line-voltage drop and line-power loss.


CHAPTER 11 RESISTORS

Identify the different types of resistors.
Explain the different ways in which resistors are used.
State the ways in which resistors are rated.
Use resistor color-codes to determine resistance value.
Calculate the total resistance of different resistor configurations.
Show how resistors are used as voltage and current dividers.


CHAPTER 12 ELECTRICITY AND MAGNETISM

Define common magnetic terms.
State the law of magnetic poles.
Describe the characteristics of magnetic lines of force.
Correctly apply the conductor and coil left-hand rules.
State the factors that determine the strength of an electromagnet.
Explain how Ohm's law can be applied to a magnetic circuit.


CHAPTER 13 RELAYS

Compare electromagnetic and solid-state relays.
Identify relay symbols used on schematic diagrams.
Describe the different ways in which relays are used.
Explain how relays are rated.
Describe the operation of ON-delay and OFF-delay timer relays.
Explain the difference between a relay and contactor.
Compare the operation of magnetic and solid contactors.


CHAPTER 14 CIRCUIT PROTECTION DEVICES

Define the terms overload and short circuit.
Compare the basic principle of operation of a fuse and a circuit breaker.
State how fuses and circuit breakers are rated.
Identify basic fuse types and typical applications.
Test fuses and circuit breakers in and out circuits.
Explain how lightning rods, grounding rods, and arresters protect electrical equipment.
Understand the purpose and function of GFCI and AFCI circuit interrupters.
Discuss how selective coordination of protective devices can prevent power blackouts.


CHAPTER 15 ELECTRIC POWER AND ENERGY

Describe the various methods of power generation.
Outline the methods used in transmitting power over long distances.
Define electric power.
Perform calculations using the electric power formulas.
Properly connect a wattmeter into a circuit.
Define electric energy.
Calculate energy consumption and costs.


CHAPTER 16 OVERVIEW OF ELECTRIC CIRCUIT AND SYSTEMS

Demonstrate a working knowledge of typical circuits found in electrical installations.
Interpret fundamental electrical wiring diagrams and layouts.
Wire door chime, door lock, and alarm system circuits.
Identify components of an incoming electric service.
Wire typical lighting and receptacle branch circuits.
Understand the purpose and process of grounding.


PART 2 DC CIRCUITS

CHAPTER 17 SOLVING THE DC SERIES CIRCUIT

Understand the voltage, current, resistance, and power characteristics of a DC series circuit.
Solve for unknown circuit values in a DC series circuit.
Measure current, voltage drops, and resistance and values in a series DC circuit.
Apply the concepts of relative polarity, series-aiding, and series-opposing voltages.
Troubleshoot a series DC resistive circuit.


CHAPTER 18 SOLVING THE DC PARALLEL CIRCUIT

Understand the voltage, current, resistance, and power characteristics of a DC parallel circuit.
Solve for unknown circuit values in a DC parallel circuit.
Measure current paths, voltages, and resitance values in a DC parallel circuit.
Apply the concepts of relative polarity to a DC parallel circuit.
Troubleshoot a parallel DC resistive circuit.


CHAPTER 19 SOLVING THE DC SERIES-PARALLEL CIRCUIT

Recognize the series and parallel parts of DC combination circuits.
Understand and correctly apply Kirchhoff's voltage and current laws to series-parallel circuits.
Determine equivalent resistance in DC series-parallel circuits.
Solve a DC series-parallel circuit for unknown circuit values.
Troubleshoot DC series-parallel resistive circuits.


CHAPTER 20 NETWORK THEOREMS

Compare voltage and current sources.
Apply the superposition theorem to a DC resistive network.
Apply the Thevenin theorem to a DC resistive network.
Apply the Norton theorem to a DC resistive network.

PART 3 AC CIRCUITS

CHAPTER 21 DIRECT CURRENT AND ALTERNATING CURRENT

Identify DC and AC waveforms.
Identify the major operating parts and functions of the AC generator.
Calculate effective, average, peak, and peak-to-peak values of a sine wave.
Compare single-phase and three-phase AC systems.
Identify the major operating parts and functions of the DC generator.
Perform circuit calculations of voltage, current, resistance, and power for AC resistive circuits.


CHAPTER 22 INDUCTANCE AND CAPACITNCE

Discuss the effects of inductance and capacitance in AC and DC circuits.
Explain the concept of inductive reactance and the factors that affect it.
Calculate the inductive reactance of a coil.
Explain the concept of capacitive reactance and the factors that affect it.
Calculate the inductive and capacitive reactance.
Define and calculate RC-time constants.
Compare phase shift in an inductor and capacitor.


CHAPTER 23 RESISTIVE, INDUCTIVE, CAPACITIVE (RLC) CIRCUITS IN SERIES

Plot and interpret vector quantities.
Solve for unknown quantities in a series RL circuit.
Solve for unknown quantities in a series RC circuit.
Solve for unknown quantities in a series LC circuit.
Solve for unknown quantities in a series RLC circuit.
Understand the relationship between resistance, reactance, and impedance.
Understand the relationship between true power, reactance power, apparent power and power factor.


CHAPTER 24 RESISTIVE, INDUCTIVE, CAPACITIVE (RLC), CIRCUITS IN PARALLEL

Solve for unknown quantities in a parallel RL circuit.
Solve for unknown quantities in a parallel RC circuit.
Solve for unknown quantities in a parallel LC circuit.
Solve for unknown quantities in a parallel RCL circuit.
Understand the relationship between resistance, reactance, and impedance in a parallel RCL circuit.
understand the relationship between true power, reactance power, apparent power and power factor in a parallel RCL circuit.
Apply the principles of power factor correction.


CHAPTER 25 TRANSFORMERS

Describe the operating characteristics of transformers.
Calculate transformer turns, voltage and current ratios.
Be familiar with routine transformer installation and maintenance procedures.
Connect teansformers in common circuit configurations.
Correctly interpret and apply transformer nameplate date.

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