UNIT 109

For The 2347-03 EWA

Apply Design and Installation Practices including Termination and Connection of Conductors in Dwellings

Aim

This unit will enable learners to demonstrate the understanding and competence required to terminate and connect conductors and cables in electrical systems, and plan, prepare and install wiring systems and associated equipment in dwellings in accordance with approved industry practices, statutory and non-statutory regulations:

  • The Electricity at Work Regulations
  • The current edition of BS 7671
  • Health & Safety at Work Act
  • Building Regulations.

Learning Outcomes

This unit is comprised of the following SEVEN Learning Outcomes – full details below.

LO1 – Prepare to install wiring systems, enclosures and associated equipment in dwellings
LO2 – Interpret appropriate information for the installation of wiring systems, enclosures and associated equipment
LO3 – Install wiring systems, and equipment in accordance with current relevant statutory and non-statutory regulations
LO4 – Confirm the quality of the completed work
LO5 – Prepare to terminate and connect cables and conductors used in dwellings
LO6 – Terminate and connect conductors and cables used in dwellings
LO7 – Understand design and installation practices and procedures.

Evidence Requirements

For Learning Outcomes 1-6

You must provide auditable evidence sourced from a real working environment to illustrate that you understand and can apply design and installation practices including termination and connection of conductors in accordance with the assessment criteria for each of the learning outcomes.

For Learning Outcome 7

You are required to demonstrate your underpinning knowledge in the design and installation practices including termination and connection of conductors as part of this unit. This will be assessed on one occasion by the assessor through a professional discussion. The professional discussion will take place as part of the overall evidence requirements for this unit, covering all the learning outcomes and assessment criteria as detailed.

There is an emphasis placed on the necessity to keep up to date with the latest standards, technologies and practices which relate to and affect the topics covered in this unit.

You personally should be in as many photos/videos as possible.

Unit 109 – Apply Design and Installation Practices including Termination and Connection of Conductors in Dwellings

Learning Outcome 1

Prepare to install wiring systems, enclosures and associated equipment in dwellings

Assessment criteria

  1. Apply appropriate procedures to include:
    1. adopting appropriate PPE
    2. following a safe system of work (eg working in accordance with a risk assessment and method statement)
    3. selecting appropriate tools/equipment for the installation work
  2. Prepare to install wiring systems, enclosures and associated equipment, to include:
    1. report any pre-work damage/defects to existing equipment or building features, to the relevant person (such as customer/client, site/line manager)
    2. confirm site readiness for installation work to begin
    3. confirm authorisation for the installation work to start
  3. Use documentation to confirm that materials and equipment are of the correct quantity and are free from damage
  4. Ensure the planned locations for the wiring system and associated equipment are compatible with other building services (eg gas, water or other electrical services)
  5. Check the planned locations for the wiring system in terms of:
    1. cosmetic appearance
    2. external influences

 

Learning Outcome 2

Interpret appropriate information for the installation of wiring systems, enclosures and associated equipment

Assessment criteria

  1. Use sources of information to enable the installation of wiring systems, enclosures and associated equipment to be carried out including: Assess two of the following:
    • specifications
    • work schedules/programmes
    • manufacturer instructions
    • layout drawings
    • other appropriate source of information (eg BS 7671, other plans or diagrams, ‘approved documents’, Building Regulations)

 

Learning Outcome 3

Install wiring systems, and equipment in accordance with current relevant statutory and non-statutory regulations

Assessment criteria

  1. Use measuring and marking out techniques which are appropriate to the wiring system, wiring enclosure and/or associated equipment that is being installed
  2. Install cables in accordance with BS 7671, the installation specification and programme of work: Assess four from:
    • single core (singles)
    • multicore insulated
    • PVC – PVC flat profile cable
    • DC cabling
    • SWA cable
    • data including PoE
    • fire resistant cabling (not including MICC)
  3. Install the following in accordance with the wiring regulations, the installation specification and agreed planned programme of work: Assess three from:
    • PVC conduit
    • PVC trunking
    • cable basket
    • cable tray
  4. Install the following types of electrical equipment and accessories, in accordance with, BS 7671, the installation specification, manufacturers’ instructions and the programme of work: Assess ALL of the following:
    1. distribution boards/consumer units
    2. socket outlets
    3. luminaires
    4. isolators/switches
    5. overcurrent protective devices
  5. Assess four from the following:
    • electric vehicle charging point
    • fire detection components
    • data socket outlets
    • WI-FI router
    • Smart camera and or Smart doorbell
    • Smart lighting control (not individual Smart lamp)
    • Smart heating controls including hard-wired connections
    • other appropriate equipment within a dwelling (eg heating system components, control equipment)
  6. Dispose of waste materials in accordance with site procedures and statutory requirements

 

Learning Outcome 4

Confirm the quality of the completed work

Assessment criteria

  1. Make good all parts of the building following installation work
  2. Ensure the installed wiring system/s and enclosure/s meet specified requirements including that they:
    1. are the correct type and fit for purpose
    2. are installed in accordance with BS 7671
    3. meet the installation specification/other relevant plans/instructions
    4. are installed in accordance with any relevant manufacturer instructions

 

Learning Outcome 5

Prepare to terminate and connect cables and conductors used in dwellings

Assessment criteria

  1. Apply appropriate procedures to include:
    1. selecting appropriate tools/equipment to enable termination and connection
    2. adopting appropriate PPE
    3. following a safe system of work (eg risk assessment, method statement, permit to work procedure)
  2. Ensure it is safe to complete termination and connection in terms of:
    1. checking for presence of supply/carrying out safe isolation
    2. mechanical soundness of the electrical equipment to be connected to
    3. checking for unsafe situations

 

Learning Outcome 6

Terminate and connect conductors and cables used in dwellings

Assessment criteria

  1. Terminate and connect cables and conductors in accordance with manufacturers’ instructions, BS 7671, and any relevant drawing or specification: Assess four from:
    • single core (singles)
    • multicore insulated
    • PVC – PVC flat profile cable
    • DC cabling
    • SWA cable
    • data including PoE
    • fire resistant cabling (not including MICC)
  2. Connect to electrical equipment in accordance with manufacturers’ instructions, BS 7671, and any relevant drawing or specification: Assess five from:
    • isolators/switches
    • socket outlets
    • distribution boards/consumer control units
    • luminaires
    • overcurrent protective devices
    • earthing terminals
    • data socket outlets or data connections
    • wired fire detection/alarm components
    • other appropriate equipment within a domestic dwelling (such as heating system components)
  3. Terminate and connect conductors, using appropriate methods: Assess two of the following:
    1. screwing
    2. crimping
    3. non-screw compression
    4. insulation displacement
  4. Ensure that terminations and connections are electrically and mechanically sound (inspecting and testing terminations)
  5. Ensure cables have appropriate identification in accordance with BS 7671

 

Learning Outcome 7

Understand design and installation practices and procedures – To be assessed on ONE occasion via Professional Discussion

Assessment criteria

  1. Describe the procedures required for establishing safe working systems on domestic work sites during installation
  2. Explain the processes required when selecting the appropriate cables and wiring systems in accordance with current BS 7671 requirements for the installation
  3. Explain how to ensure installation requirements are met when using:
    1. protective devices
    2. basic and fault protection
  4. Explain how cables and equipment are installed in accordance with:
    1. BS 7671 current requirements and the IET On-Site Guide
    2. Building Regulations
  5. Describe how fire safety standards are met, including detection and alarm systems used in domestic dwellings


Range

Procedures:
Working in accordance with:

  • Risk assessments
  • Method statements
  • Permit to work (where applicable, dependent on type of domestic site)
  • Safe Isolation

Processes:
Selection of suitable cables and wiring systems for installation and client specifications in line with current BS 7671 regulations:

  • determine the design current
  • select a suitably rated protective device
  • establish the installation method reference
  • determine appropriate rating factors
  • determine the minimum cross-sectional area of live conductors, taking into consideration current carrying capacity and voltage drop
  • establish if the voltage drop is acceptable
  • verify disconnection times have been achieved
  • evaluate thermal constraints
  • interpret the requirements of sources of information in the design of an installation

Requirements:
Working in accordance with the requirements of Part 4 (Protection for Safety) of BS 7671:

– Protective devices

  • Semi-enclosed rewireable fuses
  • Cartridge fuses
  • Circuit breakers
  • RCDs
  • RCBOs
  • AFDDs
  • SPDs

– Basic Protection:

  • Insulation of live parts
  • Use of barriers
  • Use of enclosures
  • Use of Extra-Low Voltage (ELV)

Fault Protection:

  • Earthing of exposed conductive parts
  • Bonding of extraneous conductive parts
  • Achieving ADS

Fire Safety Standards:

  • Building Regulations document B
  • BS 5839-6:2019+A1:2020

Fire detection and alarm systems in domestic dwellings:

  • Smoke detectors
  • Heat detectors
  • Sounders
  • Control panels
  • Flashing beacons