01 Safety Overview
Work safely with electricity: effects of current, OSHA/LOTO, PPE, ladders, fires, GFCI, AFCI, and grounding
View courseFree HVAC, electrical, and plumbing courses. Learn the trade and practice in the app.
HVAC, electrical, and plumbing explained step by step. No payments, no free trials, no card.
Simulations live in the app: wire the circuit, trigger the fault, and find it without risking real equipment.
13 courses available.
Work safely with electricity: effects of current, OSHA/LOTO, PPE, ladders, fires, GFCI, AFCI, and grounding
View courseUnderstand atoms, charges, materials, electrical units, Ohm’s law, static, magnetism, and resistors so you can read a circuit like a technician
View courseSolve series, parallel, and combination circuits; apply Kirchhoff’s, Thévenin’s, Norton’s, and superposition theorems in DC
View courseMeasure with voltmeter, ammeter, ohmmeter, DMM, and oscilloscope; size conductors with AWG, ampacity, voltage drop, and installation testing
View courseUnderstand conduction in liquids/gases, cells and batteries, connections, other small sources, and electromagnetic induction with Lenz’s law, RL timing, and voltage spikes
View courseMaster field trigonometry/vectors and AC fundamentals (waveforms, values, resistive loads, power, skin effect) to measure and reason about alternating-current circuits
View courseMaster inductance, inductive reactance, RL series/parallel circuits, reactive power, power factor, and angle theta to diagnose inductive AC circuits
View courseMaster capacitors, RC time constants, capacitance in AC, capacitive reactance, and RC series/parallel circuits with power factor for field application and diagnosis
View courseMaster RLC series/parallel circuits, resonance, and filters to measure, interpret, and diagnose in the field
View courseMaster three-phase circuits: wye/delta, power, multiple loads, alternators, power factor, and field metering
View courseMaster single- and three-phase transformers: ratio, polarity, banks, open delta, nameplate/%Z, special connections, and field testing
View courseMaster DC generators and motors: types, compounding, neutral plane, paralleling, speed control, BLDC/PM, and nameplate
View courseMaster three-phase alternators and AC motors (polyphase and single-phase): rotating field, types, nameplate, connections, and harmonics
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