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Select the button below to take a quick online sample lesson from these 6 popular courses to review the course layout, format, and interactivity.

Electrical Troubleshooting

Electrical Troubleshooting

The Electrical Troubleshooting online course covers use of schematic diagrams, determining sequence of operation, and use of building diagrams and single-line diagrams. Includes maintenance procedures for control circuits and combination starters. Explains troubleshooting practices on DC and AC motors, identifying unmarked leads on three-phase delta and Y-connected motors, and troubleshooting lighting systems. Electrical Troubleshooting is available in online and course manual formats.

Test your basic electrical troubleshooting knowledge! Take a 7 question quiz.

TPC Training Systems is authorized by IACET to offer 1.0 CEUs for this program.

Review a full course list for Electrical Systems Technician

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  • Online Course & Test $85.00
  • Course Manual $71.00
  • Course Manual (Spanish) $71.00

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Lesson 1 - Troubleshooting with Electrical Schematics


Symbols; Elementary diagrams; Power control and motor-starting circuits; Identifying conductors; Control panel layout; Sequence of operation

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.
– Explain how conductors in a motor-control circuit are identified.

Lesson 2 - Troubleshooting with Building Drawings


Architectural drawings; Installation diagrams; Electrical symbols on blueprints; Substation and power-installation drawings; Circuit tracing

Learning Objectives:
– Name the kinds of drawings used by electrical specialists.
– Identify electrical symbols commonly used for building diagrams.
– Describe a one-line diagram.
– Discuss the different types of drawing characteristics.

Lesson 3 - Troubleshooting Control Circuits


Control-circuit functions; Conditions of protection; Troubleshooting pushbutton, sequence/control, motor, and overload circuits

Learning Objectives:
– Explain how severe three-phase voltage unbalance affects a three-phase motor.
– List the advantages of inherent protection.
– Explain how undervoltage release works.
– Describe how to troubleshoot a motor circuit.

Lesson 4 - Troubleshooting Combination Starters


Using relay-troubleshooting charts; Latching-relay and timing-relay checks; Replacing relay coils; Troubleshooting control circuits, starters, and relays

Learning Objectives:
– List the reasons why a magnet coil burns or short-circuits.
– List the steps in troubleshooting a defective motor.
– Explain how a mechanical latching relay works.
– Explain how an electronic timing relay operates.

Lesson 5 - Troubleshooting Control Devices


Reversing controllers; Using a checking-sequence chart; Autotransformer starters; Multi-speed motor starter controls

Learning Objectives:
– Demonstrate how to reverse the rotation of a three-phase induction motor.
– Explain the function of limit switches in reversing-motor applications.
– Describe how to use a checking-sequence chart.
– Select the best starter for use where it is undesirable to put a heavy load on the power supply.
– Explain how to change the speed of a squirrel-cage motor.

Lesson 6 - Troubleshooting Special Controls


Selenium rectifiers; Testing rectifier diodes and three-phase rectifiers; Control-system logic; Static control; Time delay element

Learning Objectives:
– Explain the effects of age on a selenium rectifier.
– Name the protective devices used in electrical systems and pneumatic systems.
– State the definition of a bistable device.
– List the functions of a static control device.

Lesson 7 - Troubleshooting DC Motors


Commutator discoloration; Brush sparking; Open winding; Vibration; Bearings; DC motor controls; Drum controllers

Learning Objectives:
– List causes of electrical and mechanical vibration in a dc motor.
– Explain how oil saturation affects brushes in a dc motor.
– Explain how maximum bearing operating temperature is determined.
– List problems in the motor control that can cause sudden or unexpected changes in motor speed.
– Explain how to salvage a water-soaked motor.

Lesson 8 - Troubleshooting AC Motors


Grounded stator windings; Short-circuited and reversed phases; Open circuits; Incorrect voltage connections

Learning Objectives:
– Identify various kinds of three-phase motor failures.
– Demonstrate how to conduct a balanced-current test on a three-phase, Y-connected winding.
– List the symptoms of a reversed phase in a three-phase winding.
– Explain how to identify external leads that have become defaced.
– Demonstrate how to test for an open circuit in a split-phase motor.

Lesson 9 - Troubleshooting Lighting Systems


Troubleshooting fluorescent, incandescent, mercury-vapor, and HID lamps; Low-voltage switching; Remote control; NEC requirements

Learning Objectives:
– Explain group replacement of lamps.
– Explain the function of a ballast.
– Describe an indication of normal fluorescent lamp failure.
– State the circumstances under which the number of relays used in a switching circuit may be a limiting factor.
– Explain how disconnecting hangers work.

Lesson 10 - Saving Time in Troubleshooting


Tracing circuit problems; Equipment changes and modifications; Motor-location file

Learning Objectives:
– Name and describe the elements of a sequence of operation.
– List the features that must appear on an elementary wiring diagram to make it comply with JIC standards.
– List the steps in troubleshooting a new machine.
– List the information to be included in a motor location file.
– Select the best method for identifying a motor.

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