Basic Electrical Drawing and Testing Course

Lesson 1 • Reading a Drawing from Start to Finish

Guides students through a structured approach to interpreting a complete drawing. Reinforces all symbol and convention knowledge through a practical reading exercise.

Lesson 2 • Purpose and Scope of Electrical Drawings

Defines what electrical drawings communicate and why they are essential to safe installation and maintenance. Connects drawing literacy to real-world job tasks.

Lesson 3 • Industry Standards and Drawing Conventions

Introduces the standardized rules governing electrical drawing formats and notation. Provides the regulatory context students need before reading any schematic.

Lesson 4 • Lines, Nodes, and Connection Conventions

Explains how lines represent conductors and how junctions indicate connections or crossings. Misreading these conventions is a leading cause of wiring errors.

Lesson 1 • Active and Semiconductor Component Symbols

Introduces diodes, transistors, and integrated circuit blocks as they appear in schematics. Students learn to identify terminals and understand directional conventions.

Lesson 2 • Schematic Diagram Fundamentals

Defines schematic diagrams and distinguishes them from other drawing types. Establishes the logical, function-first perspective required to read schematics accurately.

Lesson 3 • Tracing Series and Parallel Circuits

Applies schematic reading skills to identify series and parallel paths within a diagram. Students practice tracing current paths and predicting circuit behaviour.

Lesson 4 • Interpreting Multi-Sheet Schematics

Addresses schematics that span multiple pages using cross-reference systems. Students navigate between sheets and maintain circuit continuity across the full drawing set.

Lesson 1 • Terminal Strip and Panel Wiring Diagrams

Focuses on terminal block drawings used in control panels and distribution boards. Students read terminal strip layouts and match them to physical wiring tasks.

Lesson 2 • Component Layout and Terminal Identification

Covers how components are depicted in their physical positions and how terminals are labelled. Accurate terminal identification is critical for correct wire termination.

Lesson 3 • Verifying Wiring Against Drawings

Teaches a systematic method for confirming that installed wiring matches the drawing. This skill directly supports quality assurance and fault-finding activities.

Lesson 4 • Wire Routing and Harness Drawings

Explains how wire paths, bundles, and harnesses are shown on wiring diagrams. Students learn to follow wire routes from source to destination across a panel or system.

Lesson 1 • Power System Component Symbols

Covers symbols for generators, transformers, buses, breakers, and switches on one-line diagrams. Accurate symbol recognition enables correct system-level interpretation.

Lesson 2 • Protection and Coordination Notation

Explains how protective device ratings, relay types, and coordination data appear on one-line diagrams. Students extract protection information relevant to safe system operation.

Lesson 3 • Reading Power Flow and System Topology

Teaches students to trace power flow from source through distribution to loads on a one-line diagram. Students identify radial, loop, and networked system configurations.

Lesson 4 • Introduction to One-Line Diagrams

Defines the one-line diagram and its role in representing three-phase power systems simply. Students understand why single-line notation is used and what it implies.

Lesson 1 • Motor Control Circuit Drawings

Applies ladder diagram skills to standard motor starter and reversing circuits. Students read both the power circuit and the control circuit for a complete motor control system.

Lesson 2 • Tracing Logic Conditions and Circuit States

Teaches students to evaluate rung conditions and determine output states. This analytical skill is the foundation of control circuit troubleshooting.

Lesson 3 • Ladder Diagram Structure and Conventions

Introduces the rail-and-rung structure of ladder diagrams and the logic they represent. Students understand how ladder diagrams model relay-based and PLC control circuits.

Lesson 4 • Cross-Referencing Ladder and Wiring Diagrams

Connects ladder diagram symbols to their physical counterparts in wiring diagrams. Students develop the ability to move between drawing types during troubleshooting.

Lesson 1 • Instrument Selection and Application Matching

Teaches students to choose the correct instrument for a given measurement task. Proper selection prevents measurement errors and protects both the instrument and the user.

Lesson 2 • Clamp Meters and Current Probes

Introduces clamp meters for non-contact current measurement on live conductors. Students understand jaw operation, AC and DC clamp types, and measurement limitations.

Lesson 3 • Insulation Resistance Testers

Covers the megohmmeter used to assess insulation integrity in cables and motors. Students learn test voltage selection, connection methods, and result interpretation.

Lesson 4 • Overview of Electrical Measurement

Establishes the fundamental electrical quantities that test equipment measures. Students connect measurement concepts to the circuit parameters shown on electrical drawings.

Lesson 1 • Calibration Concepts and Traceability

Introduces calibration intervals, calibration certificates, and measurement traceability. Students understand why calibrated instruments are required in professional electrical work.

Lesson 2 • Instrument Safety Ratings and Categories

Explains the overvoltage installation category system used to rate test instruments. Students match instrument category ratings to the electrical environment where they will be used.

Lesson 3 • Test Lead Inspection and Maintenance

Covers the inspection, care, and replacement of test leads and probes. Damaged leads are a primary cause of measurement errors and electrical accidents.

Lesson 4 • Zeroing, Nulling, and Field Verification

Teaches pre-measurement checks that ensure instrument accuracy before taking readings. Students perform zeroing routines and verify instrument function with known references.

Lesson 1 • Fault Isolation Using Drawings and Instruments

Combines drawing tracing with systematic measurements to isolate electrical faults. Students apply half-split and signal-injection methods guided by schematic and wiring diagrams.

Lesson 2 • Developing a Measurement Plan from Drawings

Teaches students to extract test points, expected values, and measurement sequences from electrical drawings. A structured plan reduces errors and improves troubleshooting efficiency.

Lesson 3 • Voltage Measurement in Live Circuits

Applies multimeter and clamp meter skills to measure voltage at drawing-identified test points. Students confirm supply voltages, voltage drops, and signal levels against drawing specifications.

Lesson 4 • Continuity and Resistance Verification

Uses continuity and resistance measurements to verify wiring integrity against connection drawings. Students confirm conductor paths, contact resistance, and insulation condition.