Tutorials
Comprehensive step-by-step guides for skilled trades professionals. These tutorials cover calculations, installations, code compliance, and best practices across electrical, plumbing, HVAC, construction, and safety disciplines.
Electrical Tutorials
⚡ Conduit Fill Calculations
Learn how to properly calculate conduit fill percentages according to NEC Chapter 9.
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🏠 Kitchen Outlet Requirements
Master kitchen outlet spacing, GFCI requirements, and island outlet placement.
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🔌 Box Fill Calculations
Calculate junction box sizes and conductor fill requirements accurately.
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⚡ Circuit Breaker Sizing
Properly size circuit breakers and understand overcurrent protection principles.
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Plumbing Tutorials
💧 Pipe Sizing Calculations
Calculate proper pipe sizes for water supply systems using fixture unit methods.
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🚽 Drain, Waste & Vent Systems
Design and size DWV systems for proper drainage and venting.
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🔒 Backflow Prevention
Install and test backflow prevention devices for water system protection.
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🌡️ Water Heater Installation
Proper installation, venting, and safety requirements for water heaters.
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HVAC Tutorials
🌬️ Duct Sizing Calculations
Size ductwork for optimal airflow using equal friction and velocity methods.
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🌡️ Load Calculations
Calculate heating and cooling loads using Manual J methodology.
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❄️ Refrigerant Line Sizing
Size refrigerant lines for proper system operation and efficiency.
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🌬️ Ventilation Design
Design ventilation systems per ASHRAE 62.2 and IMC requirements.
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Construction & Safety Tutorials
🏗️ Structural Load Calculations
Calculate dead, live, wind, and seismic loads for structural design.
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⚠️ Fall Protection Systems
Design and implement fall protection per OSHA 1926 requirements.
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🔥 Fire Safety Systems
Design fire suppression and detection systems per NFPA standards.
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🏠 Foundation Design
Design foundations for various soil conditions and structural loads.
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Electrical Grounding & Bonding
🌍 Grounding Electrode Conductors
Size grounding electrode conductors using NEC Table 250.66.
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🔧 Equipment Grounding Conductors
Calculate equipment grounding conductor sizes per NEC Table 250.122.
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Cross-Trade Integration
🔌 Multi-Trade Coordination
Coordinate electrical, plumbing, and HVAC systems in shared spaces.
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🏢 Commercial Building Systems
Integrate building systems for optimal performance and code compliance.
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Tutorial Categories
By Experience Level
- Beginner - New to electrical work or NEC codes
- Intermediate - Some experience with electrical calculations
- Advanced - Complex calculations and specialized applications
By Application
- Residential - Single-family homes and small multifamily
- Commercial - Office buildings, retail, and light industrial
- Industrial - Manufacturing, heavy equipment, and specialized systems
By Code Article
- Article 210 - Branch Circuits
- Article 220 - Branch Circuit, Feeder, and Service Calculations
- Article 240 - Overcurrent Protection
- Article 250 - Grounding and Bonding
- Article 314 - Outlet, Device, Pull, and Junction Boxes
- Article 430 - Motors, Motor Circuits, and Controllers
How to Use These Tutorials
Each tutorial follows a consistent structure:
- Learning Objectives - What you'll accomplish
- Prerequisites - Required knowledge and tools
- Step-by-Step Instructions - Detailed walkthrough
- Code References - Relevant NEC sections
- Practice Problems - Test your understanding
- Common Mistakes - What to avoid
- Real-World Examples - Practical applications
Interactive Features
- Live Calculations - Embedded calculators you can use
- Code Lookups - Click any NEC reference for instant access
- Progress Tracking - Mark tutorials as completed
- Bookmarking - Save tutorials for later reference
- Print-Friendly - Clean layouts for offline study
Contributing
Found an error or have a suggestion? Help us improve:
- Report Issues (opens in a new tab) - Bug reports and corrections
- Suggest Tutorials (opens in a new tab) - Request new topics
- Community Discord (opens in a new tab) - Discuss with other professionals
All tutorials are reviewed by licensed electrical professionals and updated regularly to reflect current NEC requirements and best practices.