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Electrician Theory for Apprentices

Ghost voltage, harmonics, kW vs kVA — the questions working electricians ask.

Trades · Intermediate · English · 12 videos · 4 h 26 min · videos by Electrician U

By the end you should be able to

  1. Test safely and recognise ghost voltage
  2. Explain kW vs kVA and harmonics
  3. Use Ohm's law on real jobs
Safety first. Mains electricity can kill. Switch off the supply at the breaker and prove it dead with a tester before touching any conductor. Practise on low-voltage circuits first, and leave fixed wiring to a licensed electrician wherever your local rules require one.

Watch in this order

  1. 1.Ghost Voltage and How Electricians Test It?11 min
  2. 2.Would You Trust Your Life With a Tic-Tracer?19 min
  3. 3.Voltage vs Amperage vs Wattage vs Ohmage?18 min
  4. 4.Does More Current Mean Faster Electrons or More Electrons?9 min
  5. 5.The Real Reason Your Dimmable Lights Buzz or Flicker19 min
  6. 6.How Do Electrical Harmonics Work?13 min
  7. 7.Why KW and KVA Are NOT The Same Thing (Even If They Seem Like It)13 min
  8. 8.Can AC and DC Flow Together on the SAME Wire?!10 min
  9. 9.Why Loose Wires Cause Fires: Why I Pre-Twist.17 min
  10. 10.Stop Struggling with Electrical Math – Ohm’s Law Made Simple!56 min
  11. 11.This Simple Formula Mistake is Making You Sound Wrong! (Fix It Now)7 min
  12. 12.📐 Learn to Read Blueprints Like a Pro – Live & Interactive1 h 14 min
  13. Then continue with the remaining 38 videos of the playlist on YouTube.

Before you start: Basic electricity (try “Electricity Basics, Explained Visually” first)

skillspring · Videos belong to Electrician U and play from YouTube. Printed for personal study.