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Electrical Fundamentals for Technicians

A plain-language grounding in voltage, current, AC and DC, three-phase power, site voltage levels, circuit protection and earthing. For technicians, operators and anyone who works around electrical equipment without being an electrician.

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51m
Total time
4
Competency levels
12
Lessons

What you'll learn

  • Explain voltage, current and resistance in plain terms and describe how they relate through Ohm's law
  • Distinguish AC from DC and explain why power grids generate, transmit and distribute AC
  • Describe the difference between single-phase and three-phase supplies and where each is used on site
  • Interpret power ratings in kW and kVA and explain what power factor means in practical terms
  • Recognise typical LV, MV and HV voltage levels on an industrial site and the access rules that go with them
  • Explain what fuses, MCBs, MCCBs and RCDs protect against, and why earthing and bonding keep people safe

Curriculum

Progress through each competency level in order.

1

Awareness

  • Voltage, Current and Resistance in Plain Terms
    Knowledge
    2m
  • AC and DC: Two Kinds of Current
    Knowledge
    2m
  • Awareness Check: Electrical Basics
    Assessment
    7m
2

Knowledge

  • Single-Phase, Three-Phase, Power and Power Factor
    Knowledge
    3m
  • Site Voltage Levels: LV, MV and HV Awareness
    Knowledge
    2m
  • Knowledge Check: Phases, Power and Voltage Levels
    Assessment
    8m
3

Skill

  • Circuit Protection: Fuses, MCBs, MCCBs and RCDs
    Knowledge
    3m
  • Assignment: Distribution Board Walkdown
    Assignment
    3m
  • Skill Check: Protection Devices in Practice
    Assessment
    8m
4

Mastery

  • Earthing and Bonding: Why They Keep You Alive
    Knowledge
    3m
  • Assignment: Teach the Fundamentals
    Assignment
    3m
  • Mastery Assessment: Fundamentals Applied
    Assessment
    7m

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