Electrical Wiring Course

Lesson 1 • Voltage, Current, and Resistance Basics

Introduces Ohm's Law and the relationship among voltage, current, and resistance. Provides the theoretical base for all circuit analysis in later chapters.

Lesson 2 • AC vs. DC Power Systems

Distinguishes alternating current from direct current and their residential and commercial applications. Prepares students to work safely on both system types.

Lesson 3 • Personal Protective Equipment for Electricians

Identifies PPE categories rated for electrical work and correct usage. Connects proper PPE selection to specific voltage and arc-flash exposure levels.

Lesson 4 • Lockout/Tagout Procedures

Teaches de-energization and verification steps before any wiring work. Directly prevents accidental energization injuries on the job.

Lesson 1 • Tool Maintenance and Calibration

Establishes inspection routines and storage practices that extend tool life and ensure accuracy. Poorly maintained tools produce unsafe and unreliable results.

Lesson 2 • Clamp Meters and Non-Contact Testers

Covers current measurement without breaking the circuit and safe voltage detection. These tools complement multimeter use for live-circuit diagnostics.

Lesson 3 • Using a Multimeter Accurately

Teaches voltage, continuity, and resistance measurement with a digital multimeter. Accurate readings are essential for troubleshooting in all subsequent chapters.

Lesson 4 • Hand Tools for Electrical Work

Covers wire strippers, pliers, screwdrivers, and fish tapes used daily by electricians. Proper grip and technique reduce injury and workmanship defects.

Lesson 1 • Grounding and Bonding Conductors

Distinguishes equipment grounding conductors from bonding jumpers and neutral conductors. Proper grounding is the primary defense against shock from fault current.

Lesson 2 • Wire Gauge and Ampacity Standards

Explains the American Wire Gauge system and ampacity tables used to size conductors. Correct sizing prevents overheating and code violations.

Lesson 3 • Cable Types and Jacket Ratings

Covers NM, UF, MC, and armored cable types and their approved installation environments. Jacket rating determines moisture, UV, and mechanical protection level.

Lesson 4 • Conductor Materials and Properties

Compares copper and aluminum conductors by conductivity, weight, and cost. Material choice affects ampacity, termination method, and long-term reliability.

Lesson 1 • Securing and Supporting Conduit Runs

Specifies strap, clamp, and hanger spacing requirements for each conduit type. Proper support prevents sag, vibration damage, and code violations.

Lesson 2 • Conduit Bending Techniques

Teaches stub-up, offset, back-to-back, and saddle bends using a hand bender. Accurate bends reduce wire stress and produce professional-quality installations.

Lesson 3 • Conduit Fill and Wire Pull Planning

Applies fill percentage rules to determine maximum conductors per conduit size. Pre-planning pull sequences reduces wire damage and rework.

Lesson 4 • Conduit Types and Material Selection

Compares EMT, IMC, rigid metal, PVC, and flexible conduit by application and environment. Correct selection balances protection level, cost, and installation ease.

Lesson 1 • Cover Plates and Device Finishing

Addresses alignment, cover plate selection, and weatherproof cover installation. Proper finishing protects devices and satisfies visual inspection requirements.

Lesson 2 • Box Fill Calculations

Applies conductor, device, and clamp volume allowances to verify box capacity. Overfilled boxes cause overheating and are a common inspection failure.

Lesson 3 • Splicing and Termination Methods

Covers wire nut, push-in connector, and lug termination techniques for reliable joints. Poor splices are a leading cause of arcing faults and failures.

Lesson 4 • Electrical Box Types and Selection

Covers metal and plastic boxes for switches, outlets, and junction points by application. Box type and volume must match device count and conductor fill.

Lesson 1 • Subpanel Installation and Feeder Sizing

Teaches feeder conductor sizing, subpanel mounting, and neutral-ground separation rules. Subpanels extend capacity to detached structures and large additions.

Lesson 2 • Panel Inspection and Maintenance

Identifies common panel defects including double-tapped breakers, missing knockouts, and corrosion. Routine inspection prevents failures and supports code compliance.

Lesson 3 • Overcurrent Protection Principles

Explains how fuses and breakers interrupt fault and overload current to protect conductors. Understanding trip curves guides correct device selection for each circuit.

Lesson 4 • AFCI and GFCI Breaker Installation

Covers installation and testing of arc-fault and ground-fault circuit interrupter breakers. These devices are required in expanding areas of residential installations.

Lesson 1 • Outdoor and Garage Wiring

Addresses weatherproof wiring methods, GFCI requirements, and garage circuit rules. Outdoor environments demand moisture-rated materials and additional protection.

Lesson 2 • Branch Circuit Design and Load Calculation

Applies load calculation methods to size branch circuits for lighting, appliances, and general use. Accurate calculations prevent overloaded circuits and nuisance tripping.

Lesson 3 • Kitchen and Bathroom Circuit Requirements

Details the specific circuit counts, GFCI protection, and placement rules for kitchens and bathrooms. These high-use areas have stricter requirements than general living spaces.

Lesson 4 • Service Entrance and Main Panel Layout

Explains service entrance conductors, meter base, and main breaker panel organization. Understanding panel layout is prerequisite to safe branch circuit work.

Lesson 1 • Insulation Resistance and Megohmmeter Testing

Introduces megohmmeter testing to detect degraded insulation before energization. High-resistance faults invisible to a multimeter are revealed by this method.

Lesson 2 • Identifying Short Circuits and Ground Faults

Distinguishes line-to-line shorts from line-to-ground faults and locates each with resistance testing. Both fault types cause breaker trips and potential fire or shock hazards.

Lesson 3 • Systematic Troubleshooting Methodology

Introduces a structured fault-finding process from symptom to verified repair. A repeatable method reduces diagnostic time and prevents misdiagnosis.

Lesson 4 • Diagnosing Open Circuits

Uses continuity and voltage tests to locate broken conductors, loose terminals, and failed devices. Open circuits are the most common fault type in residential wiring.