Animated Learning Guides
Step-by-step animated walkthroughs of NEC electrical calculations with interactive visualizations.
Calculations (13)
Conductor Sizing
Walk through the NEC process for sizing conductors with temperature and bundling derating factors applied step by step.
Wire Ampacity
Visualize how temperature correction and conductor bundling reduce ampacity using interactive NEC tables.
Box Fill
Learn the five box fill rules step by step - conductors, clamps, fittings, yokes, and grounds - with animated diagrams.
Voltage Drop
Follow the complete voltage drop calculation from wire resistance lookup through the formula to NEC limit verification.
OCP Sizing
Learn when to round up vs. down for breaker sizing, small conductor exceptions, and the continuous load rule.
Transformer
Calculate primary and secondary FLA, then size overcurrent protection for both sides using NEC 450.3(B).
Conduit Fill
Drop wires into a conduit and watch the fill percentage climb. Interactive cross-section with circle packing, fill gauge, and challenge puzzles.
Branch Circuit
Determine load amps, select the right breaker, and size the conductor for a complete branch circuit.
Raceway Sizing
Calculate total wire area, determine fill percentage, and find the minimum conduit size for your conductors.
Demand Factor
Understand why demand factors exist and how to apply them from NEC Tables 220.42, 220.44, and 220.55.
Motor Circuit
Size conductors, overload protection, and branch circuit OCP for motors using NEC Article 430 tables.
Load Calculation
Walk through a complete dwelling unit service load calculation from general lighting to final service size.
Service Entrance
Size service entrance conductors, grounding electrode conductors, and conduit for residential services.