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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Sketch and construct electrical circuits applicable to single-phase air conditioning, refrigeration and ventilation installations 
SAQA US ID UNIT STANDARD TITLE
116244  Sketch and construct electrical circuits applicable to single-phase air conditioning, refrigeration and ventilation installations 
ORIGINATOR
SGB Air-conditioning Refrigeration and Ventilation 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Manufacturing and Assembly 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 2  NQF Level 02  9 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
To enable a person working in the air conditioning, refrigeration or ventilation Industry to:
  • Identify electrical symbols and components.
  • Understand and describe the functioning of electrical circuits and components.
  • Sketch and construct basic single-phase electrical circuits. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
  • Knowledge of the operation of single-phase air conditioning, refrigeration and ventilation equipment.
  • Understanding the fundamentals of electricity.
  • Apply and maintain safety in an electrical environment.
  • Use of tools and test instruments. 
    		•

    UNIT STANDARD RANGE 
    Power supplies:
    Maximum 230 volt, single-phase

    Loads:
    Resistive and inductive loads

    Switching devices:
    Single and double pole switches with single or double throw, push buttons, rotary switches.
    Isolators, relays, contactors, time clocks, timers,

    Protection devices:
    Fuses, circuit breakers, earth leakage relays and overload protection devices.

    Single phase electric motors and accessories:
    Shaded pole motors, permanent split motors, split phase motors, capacitor start motors and capacitor start- capacitor-run motors and multi speed fan motors.
    Capacitors, current relays, potential relays and solid-state relays, overload relays, plug tops.

    Controls:
    Thermostats, overheating stats, humidistats, pressure stats, selector switches and smoke detectors.

    Electrical control panel accessories:
    Voltmeters, ammeters, pilot lights, push buttons, lock-out stops, terminals, transformers.

    Typical circuits:
    Circuits, including the above, devices, controls and accessories, for:
  • 2 and 4 pole single-phase -single speed induction motors as applied in air conditioning, refrigeration and ventilation units:
  • Heaters.
  • Single and multi step cooling thermostats, heating thermostats and cooling/heating thermostats.
  • Single-phase humidifiers.
  • High pressure, low pressure and dual pressure switches.
  • Electric and electronic oil pressure switches
  • Single and multi-speed fan motors.
  • Defrost timers.
  • Interlocks, sequence circuits and delayed starting.
  • Holding circuits. 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Identify switches, components and loads. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Switching devices, as per range statement, are identified and their symbols drawn. 

    ASSESSMENT CRITERION 2 
    Various types of protective devices are identified and their symbols drawn. 

    ASSESSMENT CRITERION 3 
    Various types of single-phase motors and accessories required are identified and their symbols drawn. 

    ASSESSMENT CRITERION 4 
    Various types of control instruments are identified and their symbols drawn. 

    ASSESSMENT CRITERION 5 
    Various types of electrical control panel accessories are identified and their symbols drawn. 

    ASSESSMENT CRITERION 6 
    Resistive and inductive loads are defined and contrasted. 

    SPECIFIC OUTCOME 2 
    Sketch and interpret basic single-phase circuit diagrams. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Basic circuit diagrams for the various single-phase motors together with the starting and protection accessories are drawn 

    ASSESSMENT CRITERION 2 
    Typical circuit diagrams for commonly used applications are drawn. 

    ASSESSMENT CRITERION 3 
    The function of all components is explained. 

    ASSESSMENT CRITERION 4 
    Symbols used conform to international standards. 

    ASSESSMENT CRITERION 5 
    Circuit diagrams are sketched neatly and symmetrically. 

    ASSESSMENT CRITERION 6 
    Circuit diagrams are functional according to instructions. 

    ASSESSMENT CRITERION 7 
    Circuit diagrams are correctly interpreted. 

    SPECIFIC OUTCOME 3 
    Construct single-phase circuits. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Different circuits, as per range statement, are constructed. 

    ASSESSMENT CRITERION 2 
    Relevant components required are selected. 

    ASSESSMENT CRITERION 3 
    Components are suitable and correctly connected according to diagram. 

    ASSESSMENT CRITERION 4 
    All wiring is done in accordance with work site instructions. 

    ASSESSMENT CRITERION 5 
    Correct wire sizes are used. 

    ASSESSMENT CRITERION 6 
    Circuit is correctly connected to the power supply. 

    ASSESSMENT CRITERION 7 
    Operation of the circuit is correct as intended. 

    ASSESSMENT CRITERION 8 
    No damage or injury occurred. 

    ASSESSMENT CRITERION 9 
    Tools are correctly used. 

    SPECIFIC OUTCOME 4 
    Complete the task. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Work area is cleaned in accordance with housekeeping standards. 

    ASSESSMENT CRITERION 2 
    All tools are stored in their correct place in accordance with work place practices and manufacturer's specification. 

    ASSESSMENT CRITERION 3 
    Waste materials are disposed of according to work site procedures. 

    ASSESSMENT CRITERION 4 
    Documentation is completed in detail and submitted. 

    ASSESSMENT CRITERION 5 
    Arrangement is made for the work to be verified, certified and tested by an accredited person in accordance with SANS 10142-1 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    Any person wishing to be assessed against this unit standard may apply to an assessment agency, assessor or provider institution accredited by the relevant ETQA, who may appoint a moderator to be present at the assessment.
    The assessor must have knowledge and experience of electrical as applied to air-conditioning, refrigeration and ventilation. 

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
  • Safe working practices.
  • Knowledge about conductors and insulation materials.
  • Knowledge about electrical components and accessories and how they function in electrical circuits.
  • Reasons for and methods of controlling and protecting electrical circuits and equipment.
  • Knowledge about electrical control panel construction.
  • Interpretation of electrical circuits. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems
  • Identifying electrical components and accessories 
    		•

    UNIT STANDARD CCFO ORGANISING 
    Organize and manage myself and my activities responsibly and effectively
  • Selecting required components. 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively
  • By oral or written reporting. 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically
  • By understanding the principles of electricity involved 
    		•

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Supplementary information:

    Specific requirements regarding the installation and operation of electrical equipment and accessories are contained in one or more of the following documents:
  • Manufacturer's instructions
  • Company procedures and guidelines.
    Circuits to be constructed in a simulated environment and tested under supervision.

    Any person learning towards the National Certificate in Air-conditioning, Refrigeration and Ventilation at NQF level 2 shall not work on electrically live equipment or electrically live control panels. 
    		•

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  48959   National Certificate: Air-conditioning, Refrigeration and Ventilation  Level 2  NQF Level 02  Passed the End Date -
    Status was "Reregistered"     		 2009-03-12  Was MERSETA until Last Date for Achievement 
    Core  65489   National Certificate: Air-Conditioning, Refrigeration and Ventilation  Level 3  NQF Level 03  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  MERSETA 
    Elective  65449   National Certificate: Air-conditioning, Refrigeration and Ventilation  Level 2  NQF Level 02  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  MERSETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.