City & Guilds 2366-03
Level 3 Electrotechnical (2366)
The Level 3 content arranged by 2366 units, plus organising work and finding your way around BS 7671.
Who it’s for
Learners on the 2366 Level 3 qualification.
What’s inside
- Every Level 3 topic under its 2366 unit number
- Units on organising the work and on using BS 7671
- Mock tests that follow the 2366 test layout
Why it helps
One course that matches how your qualification is laid out, so you always know where you are.
The 2366-03 Level 3 Electrotechnical qualification covers much of the same ground as the 2365 Level 3 Diploma, but it's organised into different units and adds organising the work and finding your way around BS 7671.
ProBits lays the Level 3 content out under the 2366 unit numbers, so you always know which unit you're revising. The 2366-only units on organising work and on using BS 7671 have their own notes and questions, and the mock tests follow the 2366 test layout.
Units
Unit 301
Scientific principles
- Electricity supply systems
- AC theory: impedance, reactance & resonance
- Power factor & power triangles (kW/kVA/kVAr)
- Three-phase systems (star/delta, √3)
- Machines, transformers & magnetism
- Electrical components & protective devices
- Lighting
- Electrical heating
Unit 302
Inspection, testing and commissioning
- Requirements & documentation
- Initial verification & safe testing
- Test methods & instruments
- Periodic inspection & condition reporting
- Commissioning & handover
Unit 303
Fault finding and diagnosis
- Safe working for fault finding
- Causes & symptoms of faults
- Diagnosis techniques & instruments
- Rectification & restoring supply
- Records & reporting
Unit 304
Electrical design practices and procedures
- Design process
- Supply & demand assessment
- Cable calculations & selection
- Protection & earthing design
- Documentation & specification
- Wiring systems & containment
- Installation practices & procedures
- Standard circuits & systems
- Meters & load control
Unit 305
Organising and overseeing electrical work activities
- Organising & overseeing work programmes
- Working with others
- Resources: provision & storage
Unit 306
Requirements for Electrical Installations BS 7671:2018 (A4:2026)
- How BS 7671 works: scope, object & fundamental principles
- Definitions, symbols & abbreviations (Part 2)
- Assessing general characteristics (Part 3)
- Protection against electric shock (Chapter 41)
- Protection against fire, overcurrent & overvoltage; isolation & switching
- Selection & erection: common rules & wiring systems
- Selection & erection: devices, earthing & other equipment
- Inspection & testing requirements (Part 6)
- Special locations (1): Sections 700 to 711
- Special locations (2): Sections 712 to 753
- Part 8 & the Appendices
Extras
Extras (beyond the handbook)
- Advanced DC & circuit theorems
- Mechanics & efficiency
How to use it
- 1Pick a 2366 unit and work through its topics in order, reading the study notes and trying the interactive visualisations.
- 2Use the quick checks and the practice questions to make sure each topic has stuck.
- 3Work through the BS 7671 unit with your own copy of the regulations beside you, practising finding each answer.
- 4Sit the 2366 mock tests under real conditions, then revise the topics that cost you marks.
Try a sample question
A circuit has a design current of 28 A. The most appropriate standard protective device rating, satisfying Ib ≤ In, is:
- A32 A
- B6 A
- C20 A
- D25 A
Show the answer
Answer: A. In must be ≥ Ib (28 A), so the next standard rating of 32 A is selected. A 25 A device would be below the design current and would trip in normal use.
Questions about this course
- Is this the official City & Guilds course?
- No. ProBits is a revision and practice app. It isn't made, approved or endorsed by City & Guilds, and you still sit your real exams through your college or training provider.
- Does it copy BS 7671?
- No. The BS 7671 unit teaches you where things are in the regulations and how to use them, so you can find the answer in your own copy. It never reproduces the regulations' text.
- How much does it cost?
- One subscription opens every course: £6.49 a month or £57 a year. Every new account starts with 14 days free, and you can cancel any time.
Start learning today
14 days free. Sign up with your email in a minute. Works on your phone, tablet and computer.