Industrial Electrical Blueprint Reading

Table of Contents

Chapter 1: Introduction to Safety

Topics: Responsibility for safety; Your company's safety program; Unsafe acts and unsafe conditions; Recognizing hazards; Health hazards; Types of accidents; Accident investigation; Handling emergencies; Safety off the job

Learning Objectives:

• Define the terms accident and hazard.
• Name and define the four main types of hazards.
• List and define various types of accidents.
• Compare meanings of the terms unsafe act and unsafe condition.
• Name the three ways in which a toxic substance can enter your body.
• List ways in which a company must plan for emergencies.
• Tell the main reason for prompt accident investigation.

Chapter 2: Safety Laws

Topics: Occupational safety and health administration; The rights of employees and employers; OSHA standards; Inspections by OSHA; Taking immediate action; Records and reports; OSHA and your job; OSHA's hazard communication standard; Sections of the MSDS; NIOSH; EPA and OSHA

Learning Objectives:

• State the purpose of the OSHA Act.
• List the specific rights of employees under the Act.
• Explain what to do in a dangerous work situation.
• List things that you can do to help keep your workplace in compliance with OSHA standards.
• Explain the function of each of the following agencies: NIOSH, EPA.
• List the four main objectives of OSHA's Hazard Communication Standard.
• Tell what information can be found on an MSDS.

Chapter 3: Electrical Safety

Topics: Electricity; The electric circuit; Injuries from electricity; First aid for shock victims; National electrical code; Static electricity

Learning Objectives:

• Define the following terms: electric current, circuit, potential difference, ampere, watt, ohm, and volt.
• State Ohm's Law.
• Explain the function of each wire in a simple electric circuit and tell the color(s) used to identify each.
• List the three factors that affect the severity of an electric shock.
• Describe the effects of electric current on the human body.
• Tell the three most important points about first aid for shock victims.
• Explain how static electricity is generated, why its accumulation can be dangerous, and how it can be avoided.

Chapter 4: Electrical Protection

Topics: Grounding; Protection against ground faults; Fuses and circuit breakers; Circuit breaker reset and fuse replacement; Portable power tools; Hazardous electrical locations; Basic rules of electrical safety

Learning Objectives:

• Explain the importance of proper grounding.
• Define the term "ground fault" and explain how ground faults occur.
• Explain the purpose and operation of the following devices: GFCI, fuse, circuit breaker.
• Identify typical hazardous electrical locations.
• Explain the purpose of explosion-proof and intrinsically safe electrical equipment.
• List at least two electrical safety rules in each of the following areas: clothing, equipment, water, lockout/tagout.

Chapter 5: Introduction to Blueprints

Topics: Importance of blueprints; Purpose of blueprints; Types of information on blueprints; Supplementary spaces; Detail drawings; Interpreting a detail drawing; Assembly drawings; Orthographic projections; Auxiliary views; Sections; Pictorial drawings

Learning Objectives:

• Identify details, markings, and machine parts from an assembly drawing.
• Identify an object from an orthographic drawing.
• Identify elements located within the title block of a detail drawing.
• Explain why more than one orthographic projection is needed to show an object on a blueprint.

Chapter 6: Electrical Drawings

Topics: Importance of electrical drawings; Electric power; Controlling electricity; Electrical drawings; Electrical wiring; Using electrical drawings

Learning Objectives:

• Identify different electrical symbols on a drawing.
• Identify the power distribution panels in your plant.
• Identify different types of conduit and cable.
• Select the best electrical drawing to use when looking for a faulty circuit between the basement and the first floor.
• Select the best electrical drawing to use when looking for a faulty circuit between the basement and the first floor.
• Explain how electricity at 480 V is reduced by a transformer to 120/240 V.
• Define the terms voltage, current, and power.

Chapter 7: Introduction to Technical Diagrams

Topics: Symbols in schematics; Using schematics; Electrical schematics; Pneumatic and hydraulic schematics; Piping schematics; Value of schematics; Looking for flow; Electric current; Fluid flow

Learning Objectives:

• State the definition of a schematic.
• List some characteristics of schematics.
• Identify a schematic among other kinds of technical drawings and diagrams.
• Explain how flow is indicated on a schematic.

Chapter 8: Symbols on Schematics

Topics: Common features of schematics; Differences in schematics; Using the schematic; Understanding symbols; Identifying symbols; Identifying connections; Reading diagrams

Learning Objectives:

• Identify various types of lines on schematics.
• Identify the following schematics by their symbols: electrical, fluid-power, and piping.
• Give the purpose of legends and other tables of symbols
• Describe a set-by-step approach to troubleshooting when using a schematic.

Chapter 9: Electrical Symbols

Topics: Wires and connections; Switches; Power supply; Electrical loads; Coils and transformers; Fuses and circuit breakers; Grounding; Contacts; Resistors; Symbols in a diagram

Learning Objectives:

• State the meaning of symbols and lines on an electrical schematic.
• Explain the difference between a fuse and a circuit breaker.
• Explain how to trace an electrical circuit.

Chapter 10: Electrical Diagrams

Topics: Kinds of electrical drawings; Schematic diagrams; Series and parallel circuits; Wiring diagrams; Reading electrical diagrams; Reading industrial schematics; Practice exercises

Learning Objectives:

• Explain the difference in current flow between a series circuit and a parallel circuit.
• Explain the purpose of a wiring diagram.
• Demonstrate how to read an electrical schematic.
• Identify the objects represented by the symbols on an industrial schematic.

Chapter 11: Troubleshooting with Electrical Schematics

Topics: Standard symbols and diagram identification; Elementary diagrams; Reading the schematic diagram; Power circuit; Control circuit; Motor-starting circuit; Identifying conductors; Numbering components; Locating relay contacts; Control-panel layouts; Sequence of operation; Related schematic information

Learning Objectives:

• Identify a control relay on an electrical schematic.
• State the NEC requirements for fuses in ungrounded conductors.
• Explain component numbering on electrical schematics.

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