Electrical Panel Design Course

Lesson 1 • Core Panel Components Overview

Identifies and explains every major component inside a panel enclosure. Connects component knowledge to safe and functional panel assembly.

Lesson 2 • Regulatory and Safety Framework

Introduces the regulatory environment governing panel design, including safety standards and inspection requirements. Frames compliance as a non-negotiable design constraint.

Lesson 3 • Introduction to Electrical Panels

Covers the function of electrical panels in power distribution and their place in building infrastructure. Establishes vocabulary and context for all subsequent design work.

Lesson 1 • Short-Circuit and Fault Current Basics

Introduces fault current concepts needed to select appropriately rated equipment. Connects fault current levels to breaker and busbar interrupting capacity requirements.

Lesson 2 • Panel Capacity and Future Growth

Determines total panel capacity requirements including safety margins and expansion allowances. Ensures the designed panel accommodates future load additions without replacement.

Lesson 3 • Understanding Electrical Loads

Classifies loads by type, behavior, and demand characteristics. Accurate load classification is the prerequisite for all sizing and protection decisions.

Lesson 4 • Demand Factor and Diversity Factor

Explains how demand and diversity factors reduce over-sizing in panel design. Applying these factors produces realistic load estimates for commercial and industrial panels.

Lesson 1 • Grounding Conductor Sizing

Determines correct sizing for equipment grounding conductors and grounding electrode conductors. Proper grounding sizing ensures fault current clears protective devices reliably.

Lesson 2 • Busbar Sizing and Material Selection

Covers busbar current capacity, material properties, and mechanical considerations. Properly sized busbars carry full panel load without excessive temperature rise.

Lesson 3 • Conductor Ampacity Fundamentals

Explains ampacity tables, insulation temperature ratings, and correction factors. Correct ampacity selection prevents overheating and insulation failure in panel wiring.

Lesson 4 • Wire Gauge Selection for Circuits

Applies ampacity rules to select wire gauges for branch circuits and feeders. Connects wire sizing to breaker coordination and voltage drop limits.

Lesson 1 • Fuse Types and Applications

Explains current-limiting and time-delay fuses and their protective characteristics. Fuse selection complements breaker use in specific industrial and motor-circuit applications.

Lesson 2 • Selective Coordination Principles

Introduces time-current curve analysis to achieve selective coordination between devices. Coordination ensures only the nearest upstream device operates during a fault.

Lesson 3 • Ground Fault and Arc Fault Protection

Covers GFCI and AFCI protection requirements and device selection. These devices address shock and fire hazards beyond what standard overcurrent protection provides.

Lesson 4 • Overcurrent Device Sizing Rules

Applies standard sizing rules for branch circuit and feeder overcurrent protection. Correct sizing protects conductors while allowing normal load operation without nuisance tripping.

Lesson 1 • Enclosure Selection and Ratings

Covers enclosure types, environmental protection ratings, and material options. Enclosure selection directly affects panel longevity and personnel safety in the installation environment.

Lesson 2 • Working Space and Access Requirements

Defines required working space in front of and around panels for safe operation and maintenance. Compliance with access requirements is mandatory for inspection approval.

Lesson 3 • Component Placement and Spacing

Establishes rules for placing breakers, busbars, terminals, and accessories within the enclosure. Proper placement ensures safe working clearances and logical circuit organization.

Lesson 4 • Wiring Duct and Cable Management

Designs internal cable routing using wiring ducts, tie-wraps, and cable trays. Organized wiring reduces installation errors and simplifies future maintenance access.

Lesson 1 • Motor Control Components

Covers contactors, overload relays, and motor starters used in panel-mounted motor control. Correct selection and wiring of these devices ensures safe motor operation and protection.

Lesson 2 • PLC and HMI Panel Integration

Addresses mounting, power supply, and I/O wiring for PLCs and HMIs within panels. Proper integration ensures reliable automation control and operator interface functionality.

Lesson 3 • Control Circuit Fundamentals

Introduces control voltage levels, control transformers, and basic control circuit topology. Control circuit knowledge is the foundation for integrating relays and PLCs into panels.

Lesson 4 • Instrumentation and Metering Devices

Integrates current transformers, voltage transformers, and panel meters into the design. Metering provides operators with real-time data for monitoring and energy management.

Lesson 1 • As-Built Documentation and Handover

Explains the process of updating drawings to reflect field changes and preparing handover packages. Accurate as-built documentation is essential for safe long-term panel operation and maintenance.

Lesson 2 • Schematic Diagram Standards

Establishes drawing conventions, symbol libraries, and sheet organization for panel schematics. Standardized schematics communicate design intent clearly to installers and inspectors.

Lesson 3 • Wiring and Interconnection Diagrams

Creates detailed wiring diagrams showing every terminal, wire number, and connection point. These diagrams guide physical installation and reduce wiring errors in the field.

Lesson 4 • Single-Line Diagram Development

Teaches construction of single-line diagrams showing power flow from source to loads. Single-line diagrams are the primary reference for understanding panel hierarchy and protection.

Lesson 1 • Functional and Operational Testing

Verifies that all circuits, controls, and protective devices operate correctly under load. Functional testing confirms the panel performs as designed before handover to the client.

Lesson 2 • Pre-Energization Inspection Procedures

Defines visual and mechanical checks performed before applying power to a completed panel. These checks catch wiring errors, loose connections, and clearance violations before they cause failures.

Lesson 3 • Preventive Maintenance Planning

Develops scheduled maintenance programs covering inspection, cleaning, and testing intervals. A structured maintenance plan extends panel service life and prevents unplanned outages.

Lesson 4 • Protective Device Testing and Calibration

Tests and calibrates overcurrent, ground fault, and relay protection settings. Verified protection settings ensure devices operate within specified time-current parameters.