# Power Distribution

SKET 132

## Course Description

Prerequisite: SKET 120 with a minimum grade of "C". The principles of electromagnetic induction are discussed and applied to the operation of DC generators, single phase AC generation, three phase alternators, and alternative power sources. Wye and delta connections will be explained and students will solve equations to determine voltage, current, and power in branch circuits. Students will distinguish various properties of conductors including type, physical size, ampacity, resistance, reactance, insulation, and temperature rating. Load requirements for branch circuits will be analyzed and appropriate wire type and size will be selected for the application. Other topics discussed include power factor correction, conductor derating, conductor identification, wire color codes, termination requirements, and conduit fill requirements. (45-0)

## Outcomes and Objectives

### Explain the theory of operation for power generation.

#### Objectives:

• Describe the basic operation of a battery.
• Explain the concept of electromagnetic induction and how it is used to generate electricity.
• Identify the primary components in generators.
• Describe the basic operation of DC generators.
• Explain the basic operation of single phase AC generation.
• Describe the generation of three phase AC power and differentiate between Delta and WYE connections.
• Differentiate between real, reactive, and apparent power from the power triangle for applications involving different power factors.
• Describe the basic operation for alternative energy sources including solar and wind turbine applications.

### Apply the knowledge of power generation to perform calculations.

#### Objectives:

• Perform calculations to determine current, voltage, and power for DC applications.
• Perform calculations to determine current, voltage, and power for single phase AC loads.
• Perform calculations to determine current, voltage, and power for three phase branch circuits.
• Determine capacitor requirements to perform power factor correction and calculate revised power factor.
• Develop circuit diagrams for power applications.

### Differentiate between different properties of conductors.

#### Objectives:

• Differentiate between various properties of conductors including type, physical size, ampacity, resistance, reactance, insulation, and temperature rating.
• Describe and calculate losses in transmission lines.
• Calculate voltage drops in circuits due to various types of wiring used in power applications.
• Analyze load requirements for branch circuits and select appropriate wire type and size for application.

### Apply knowledge of power distribution to NEC and NFPA requirements.

#### Objectives:

• State and comprehend safety precautions when working on electrical equipment.
• Perform conductor derating calculations based on applicable standards.
• Identify and explain requirements for conductor identification, wire color codes, termination, and conduit fill based on applicable standards.
• Develop troubleshooting techniques.