SAQA

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.

SOUTH AFRICAN QUALIFICATIONS AUTHORITY

REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE:

Identify, interpret and produce electrical working drawings

SAQA US ID	UNIT STANDARD TITLE
14489	Identify, interpret and produce electrical working drawings
ORIGINATOR
SGB Civil Engineering Construction
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-
FIELD			SUBFIELD
Field 12 - Physical Planning and Construction			Physical Planning, Design and Management
ABET BAND	UNIT STANDARD TYPE	PRE-2009 NQF LEVEL	NQF LEVEL	CREDITS
Undefined	Regular	Level 4	NQF Level 04	8
REGISTRATION STATUS		REGISTRATION START DATE	REGISTRATION END DATE	SAQA DECISION NUMBER
Passed the End Date - Status was "Registered"		2003-02-19	2006-02-19	SAQA 0146/03
LAST DATE FOR ENROLMENT		LAST DATE FOR ACHIEVEMENT
2007-02-19		2010-02-19

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 is replaced by:

US ID	Unit Standard Title	Pre-2009 NQF Level	NQF Level	Credits	Replacement Status
263006	Interpret, read and produce electrical working drawings	Level 4	NQF Level 04	8

PURPOSE OF THE UNIT STANDARD

This unit standard provides a broad introduction to the producing of electrical working drawings. It is the starting point for a learner in this sector. The focus is knowledge, skills, values and attitudes in relation to the learner`s own context and experience of the world of work.

The qualifying learner is capable of:

Describing and explaining the purpose of electrical draughting and the principles of electricity.

Identifying, defining and drawing electrical / electronic graphic symbols and diagrams.

Demonstrating an understanding of the generation and distribution of electricity.

Describing and drawing the control and protection of electric motors

Demonstrating an understanding of the wiring of premises.

Demonstrating an understanding of interior and exterior lighting design.

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING

Learners accessing this unit standard will have demonstrated competence in mathematics, engineering science and technical drawing at NQF level 4 or equivalent.

Learners accessing this unit standard will have demonstrated competence in computer technology at Level 4 on the NQF or equivalent.

UNIT STANDARD RANGE

Special publications will include: SABS 0142; Code of Practice for the Wiring of Premises, SABS 0144; Code of Practice for Interior Lighting (Artificial), IEC Publication 27; Letter Symbols to be used in Electrical Technology, IEC Publication 50; International Electro technical Vocabulary, IEC Publication 113; Diagrams, Charts and Tables, IEC Publication 617; Graphical Symbols for Diagrams, IEC Publication 750; Item Designation.

Basic concepts of electricity will include current flow, voltage, resistance and resistivity, factors that determines resistance, types of electrical supplies (AC and DC), inductance and capacitance.

Electro magnetism will include: characteristics of a magnetic field, magnetic field around a current carrying conductor, solenoid and relay, core, turns and polarity.

Measuring instruments will include voltmeter, ammeter, ohm-meter, wattmeter and kilowatt-hour meter.

Electrical units and symbols will include: resistance (ohm - W); voltage (volt - V); current (ampere - A); inductance (henry - H); capacitance (farad - F); power (watt - W); time (seconds - s; hours - h); energy (joule - J; kilowatt-hours - kWh); frequency (hertz - Hz); magnetic flux density (tesla - T); illuminance (lux - lx); flux (lumen - lm). Greek alphabet: (alpha, beta, theta, mu, pi, rho, sigma, phi, omega).

Qualifying symbols will include direct current, alternating current of 50Hz, positive polarity, and negative polarity.

Electrical components will include resistor, variable resistor, potentiometer heating element and capacitor.

Electronic components (semiconductors) will include: diode, light emitting diode, tunnel diode, zener diode, diac, triode thyristor, transistor PNP, transistor NPN, light dependant resistor, photodiode, photovoltaic cell.

AC power generation will include the following types: Hydro electrical, coal and nuclear. DC power generation will include the following types DC generators, rectified AC and chemical (batteries). Power transmission / distribution will include the following: Overhead power lines, cables, substations, transformers, rectifiers, switchgear, protection devices and kiosks in a ring feed system.

DC motors will include shunt and series motors. AC motors will include squirrel cage and slip ring motors.

Single and three phase motor control (starting, speed control, stopping, and change of direction and protection) will include Mechanical switches, contactors, circuit breakers, star-delta, forward reverse and capacitor start. Motor protection will include thermal, overcurrent and undervoltage protection

Electric light and power layouts will include lighting with normal, two-way, intermediate and automatic (photo electric control unit) switching, switched and welding socket outlets, comfort heating / air-conditioning, water heating, stove and oven points, worship equipment, distribution boards and cabling.

Distribution board circuit diagrams will include incoming cabling and protective devices, busbars, phase indication, load balancing, sub circuit protection and indication, earth leakage protection, water heating control circuitry (industrial installations), current ratings and cable sizes

Lighting designs will consider minimum specified illumination levels, glare levels, environmental factors such as reflective properties of floors, walls and ceilings, office / industrial /domestic application as well as pollution levels and hazardous environments.

Types of lamps will include incandescent, fluorescent, mercury, sodium and metal halide

Luminaires will include commercial, industrial, diffused, anti-corrosive and protected types.

Exterior lighting will include security (perimeter), street, medium and high mast lighting.

Specific Outcomes and Assessment Criteria:

SPECIFIC OUTCOME 1

Describe and explain the purpose of electrical draughting and the principles of electricity

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The purpose of electrical draughting is described according to organisational requirements.

ASSESSMENT CRITERION 2

2. The purpose of specific publications are described according to organisational requirements.

ASSESSMENT CRITERION 3

3. The basic concepts of electricity are explained in accordance with accepted definitions.

ASSESSMENT CRITERION 4

4. Electromagnetism principles are explained and a drawing is produced.

ASSESSMENT CRITERION 5

5. The uses and connection diagrams of measuring instruments are explained and a drawing is produced.

ASSESSMENT CRITERION 6

6. The purpose and basic uses of electronic components are explained in accordance with accepted definitions.

ASSESSMENT CRITERION 7

7. Electrical units are identified and explained in accordance with accepted definitions.

SPECIFIC OUTCOME 2

Identify, define and draw electrical / electronic graphic symbols and diagrams

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. Electrical / electronic symbols are identified and defined in accordance with accepted definitions.

ASSESSMENT CRITERION 2

2. Graphic symbols for electrical diagrams are identified and drawn.

ASSESSMENT CRITERION 3

3. The purpose of the different types of electrical diagrams are identified and explained according to organisational requirements.

ASSESSMENT CRITERION 4

4. Electrical / electronic diagrams are drawn, labelled and cross-referenced according to IEC publications.

ASSESSMENT CRITERION 5

5. A stock list of components is drawn up for a specific circuit diagram.

ASSESSMENT CRITERION 6

6. An electrical / electronic drawing is produced within agreed format and timeframes.

SPECIFIC OUTCOME 3

Demonstrate an understanding of the generation and distribution of electricity

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The basic principles and components of AC power generation are described in accordance with accepted definitions

ASSESSMENT CRITERION 2

2. The basic principles and components of DC power generation are described in accordance with accepted definitions

ASSESSMENT CRITERION 3

3. The basic principles of power transmission / distribution are described in accordance with accepted definitions

ASSESSMENT CRITERION 4

4. A single line diagram of a typical high-voltage reticulation system is drawn within agreed timeframes.

SPECIFIC OUTCOME 4

Describe and draw the control and protection of electric motors

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. DC motors are identified and their purpose, use and characteristics are described.

ASSESSMENT CRITERION 2

2. AC motors are identified and their purpose, use and characteristics are described.

ASSESSMENT CRITERION 3

3. Control and protection is identified and the purpose, use and characteristics are described.

ASSESSMENT CRITERION 4

4. A circuit diagram of a DC motor is produced within agreed timeframes.

ASSESSMENT CRITERION 5

5. A free-hand drawing of a squirrel cage rotor is produced within agreed timeframes.

ASSESSMENT CRITERION 6

6. A labelled connection diagram of a three phase motor starter is produced within agreed timeframes.

ASSESSMENT CRITERION 7

7. A multi-line circuit diagram of a three phase motor starter is converted into a single line diagram within agreed timeframes.

ASSESSMENT CRITERION 8

8. Cable sizes and circuit breaker ratings are calculated for AC motors and are in line with organisational requirements.

SPECIFIC OUTCOME 5

Demonstrate an understanding of the wiring of premises

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. SABS 0142 Code of Practice for the wiring of premises is applied to electrical installation drawings.

ASSESSMENT CRITERION 2

2. A circuit diagram of distribution boards is produced within agreed timeframes.

ASSESSMENT CRITERION 3

3. Balancing the load on a three-phase system is explained in accordance with accepted definitions.

ASSESSMENT CRITERION 4

4. Electrical installation symbols are correctly placed onto standard building plans.

SPECIFIC OUTCOME 6

Demonstrate an understanding of interior and exterior lighting design

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. SABS 0114, code of practice for interior lighting is explained

ASSESSMENT CRITERION 2

2. Basic principles of lighting design are described according to organisational requirements

ASSESSMENT CRITERION 3

3. Negative effects of glare and the solution thereof are described

ASSESSMENT CRITERION 4

4. Different types of lamps and the application thereof are described

ASSESSMENT CRITERION 5

5. Different types of luminaries and the application thereof are described.

ASSESSMENT CRITERION 6

6. Types and application of task lighting is explained in accordance with accepted definitions.

ASSESSMENT CRITERION 7

7. Different types of exterior lighting are described in accordance with accepted definitions.

ASSESSMENT CRITERION 8

8. A lighting layout drawing using appropriate symbols is drawn within agreed timeframes.

UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS

The relevant Education, Training, Quality Assurance Body (ETQA) will accredit providers offering learning towards this standard, and register assessors.

UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE

A basic understanding of electricity and electronics.

A general understanding of the regulations for wiring a premises.

A general understanding of local authority wiring regulations.

A general and broad understanding of the regulations and design of interior and exterior lighting.

A broad understanding of National Building Standards.

A comprehensive understanding of line drawings.

A comprehensive understanding of schematics.

A general understanding of panel layouts.

Critical Cross-field Outcomes (CCFO):

UNIT STANDARD CCFO IDENTIFYING

Identify and solve problems which occur when applying draughting to electricity / electronic drawings.

UNIT STANDARD CCFO ORGANISING

Organise oneself and one`s activities in such a way as to have access to graphic symbols and diagrams.

UNIT STANDARD CCFO COLLECTING

Collect, analyse, organise and critically evaluate information pertaining to electrical draughting.

UNIT STANDARD CCFO COMMUNICATING

Communicate effectively with stakeholders regarding the requirements of drawings for electrical draughting.

UNIT STANDARD CCFO SCIENCE

Use science and technology to enhance electrical draughting work.

UNIT STANDARD NOTES

This unit standard has been replaced by unit standard 263006, which is "Interpret, read and produce electrical working drawings", Level 4, 8 credits.

QUALIFICATIONS UTILISING THIS UNIT STANDARD:

	ID	QUALIFICATION TITLE	PRE-2009 NQF LEVEL	NQF LEVEL	STATUS	END DATE	PRIMARY OR DELEGATED QA FUNCTIONARY
Elective	50018	Further Education and Training Certificate: Computer Aided Drawing Office Practice	Level 4	NQF Level 04	Passed the End Date - Status was "Registered"	2009-02-09	Was CETA until Last Date for Achievement
Elective	23773	National Certificate: Computer Aided Drawing Office Practice	Level 4	NQF Level 04	Passed the End Date - Status was "Registered"	2006-02-09	Was CETA until Last Date for Achievement
Elective	50245	National Certificate: Maintenance Coordination	Level 5	Level TBA: Pre-2009 was L5	Passed the End Date - Status was "Registered"	2010-11-11	TETA

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