⭐ Upgrade to Pro - £19
Unlock all lessons and mock exams to pass Level 2 + Level 3 theory exams.
Upgrade nowTerminal & Connection Types
Read through the material below, then test your understanding.
Module Lessons
Electrical Principles & Diagnostics
Ohm's Law & Electrical Power
Protection Against Electric Shock
Electrical Statutory Regulations
BS 7671 & IET Guidance Documents
Reading Electrical Plans & Diagrams
Consumer Units & Protective Devices
Lighting & Power Circuits
Earthing, Bonding & ADS
Electrical Accessories
Current-Using Equipment & Specialist Controls
Effects of Electric Shock on the Body
Tool & Equipment Safety Classes
The Safe Isolation Procedure, Step-by-Step
Hand Tools for Electrical Work
Cable Types
BS 7671 Termination Requirements (Section 526)
Terminal & Connection Types
Cable Glands & Enclosure Entry
Terminating Flexes & Single-Core Cables
Terminating Flat Profile (Twin & Earth) Cable
Installing Main Protective Bonding
Fitting & Labelling BS 951 Bonding Clamps
Electrical Test Instruments
Central Heating Control Sequence of Operation
Diagnosing Boiler Thermostats & Fans
Diagnosing Air Pressure Switches
Diagnosing PCBs & Ignition Components
Diagnosing Thermocouples & Thermistors
Alternative & Emerging Heat Sources
Testing Immersion Heaters
Isolating & Correcting Appliance Faults
Lesson Overview
Selecting the correct terminal and connection method ensures electrical joints maintain durable continuity and mechanical strength without overheating. Understanding terminal profiles, crimp sizing, and push-fit connections prevents high-resistance faults.
Learning Objectives
Identify the operating characteristics and preparation rules for square, circular, and moving-plate screw terminals.
Specify the colour coding, conductor sizing, and application rules for insulated and uninsulated crimps.
Explain the advantages and limitations of non-screw compression push-fit connectors and ferrules.
Unlock the full lesson & knowledge check
Get lifetime access to every Level 2 & 3 lesson, 3500+ total questions, and timed City & Guilds mock exams.
Get Pro Access (£19)Already have Pro? Sign in
Interactive City & Guilds Level 2 and Level 3 plumbing lessons, flashcards and mock exams, built for UK students and professionals.
© 2026 PlumbingIQ. All rights reserved.