Electrical Installation and Drawings: A Comprehensive Guide

This comprehensive guide delves into the world of electrical installation and drawings, covering essential aspects like architectural drawings, electrical drawings, circuit diagrams, wiring diagrams, building construction drawings, regulations, standards, and job specifications. It provides a detailed understanding of the various types of drawings, their purpose, conventions, and applications in the electro-technology industry. The guide also explores the importance of technical standards, their development, and their role in ensuring safe and compliant electrical installations. Additionally, it examines the process of developing job specifications, including the NATSPEC system and the key sections included in common workplace templates. This resource is invaluable for students, professionals, and anyone seeking to gain a thorough understanding of electrical installation and drawings.

Table of Contents
TASK 1 Architectural drawing................................................................................................................2
Task 2 - Electrical drawings....................................................................................................................5
Task 3 - Circuit diagrams........................................................................................................................8
Task 4 - Wiring diagrams.....................................................................................................................10
Task 5 - Building construction drawings and diagrams........................................................................12
Task 6 - Regulation for undertaking electrical work............................................................................14
Task 7 - Standards philosophy and format..........................................................................................15
Task 8 - Purpose, format and content of typical job specifications.....................................................18
Questions............................................................................................................................................19
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14.........................................................................................................................................................22

Written activity
TASK 1 Architectural drawing
1. What information should be included in a site plan?
Information that must be included in the site plan is;
 All the land features ad characteristics
 Structures
 Land and building total area
 Property structure and boundary distance
 Amenities
 Symbols
 Scale
 Site land contours
 Drawings
2. What information should be included on a floor plan?
Floor plan is a standard and structures scale for building drawing plan. Following information needs
to be included in the floor plan that is;
 Windows and doors
 Scale
 Electrical fittings
 External and internal wall dimensions
 Appliances
 Standard symbols
 Cable routes
 Conventions of standard drawings.
3. When using an architectural floor plan in order to determine the location and
requirements for the power and lighting or communications / audio/ video layouts
required in a domestic installation, what will you need to take into consideration?
Architecture floor plan is necessary to use for determining various aspects like lighting, power, video,
communication and audio layout which is needed for complete installation of domestic wiring.
Following are the necessary aspects that needs to be taken into consideration that are;
 Scale
 Each connection wiring requirements
 Floor plan detail

 Each product and item standard symbol
 Each connection circuit requirements
4. Discuss the following in regards to site plans:
a. Service point
On each floor plan there is a point of service which is used for depicting the point exact location
where the wiring system of consumer and wholesaler provider of electrical meets.
b. Consumers mains
Consumer’s mains as the name suggest is the chief supply point for the consumers that are drawn
from the service point drawing.
c. Main switchboard
The switchboard incorporates entire electrical cables and consumer mains that run around or within
the building area. Switchboard incorporates;
 Safety switches
 Main power connection
 Main fuse
 Buildings entire mainline and backline connections
 Consumption measuring device.
d. Distribution boards
It is the domestic component of wiring system that separates the main power supply in distinct
circuits. It is generally present as main switchboard at some location in the building.
e. Builder’s supplies
In some specific case or situation builders needs an electrical supply range for utilizing the running
power of the property. Due to this purpose before the completion of property construction of wiring
in the building or property is completed.
5. What is the most common scale used for floor plans? What does it represent?
Site or architectural drawings need to be done on scale. Some standard fractions are important for
floor plans that are 1:50 and 1:100.
 1:100- also known as 1/100th which defines that the definite item would be 100 times
greater than the floor plan size.
 1:50- also known as 1/50th which defines that the definite item would be 50 times greater
than the floor plan size.
Widely used scale is 1:100scale for the floor plans as it is the most standard format.

6. Draw or define the following to complete the table of Australian standardized symbols
for floor plans used on floor plans:
This is a symbol
representing Time
switch
Dimmer switch
This is a symbol
representing with
wiring Lighting
outlet position
Connection or
junction box
This is a general
symbol representing
projector
Flood light
This is a symbol
representing Bell Double pole switch

Task 2 - Electrical drawings
1. Describe the purpose of each of the following types of electrical drawings:
a. Block diagrams
It is a components made from block series that makes the electric circuit or project. it is mainly used
for the;
 Planning
 Communication
 Design and
 Installation
b. Circuit diagrams
It is a symbol or pictorial constructed drawings or diagrams made from standard designs, layouts and
formats of all elements that make the electrical circuit. It is mainly used for following purpose;
 Installation
 Planning
 Design
 Troubleshooting and
 Communication
c. Wiring diagrams
It is made from the standard lines and symbol range that explains each components and connections
needed for device or building wiring. It is mainly used for following purpose that is;
 Installation
 Communication
 Troubleshooting
 Design and
 planning
d. Ladder diagrams
It is ladder due to its construction shape. Rail at the left is component carrying current and Two
vertical poles denotes the power source and the right rail is grounding. It is mainly used for the
following purpose that is;
 Troubleshooting
 Power circuit understanding
 Corrections and
 Maintenance

2. Draw or define the following to complete the table of Australian standard symbols
used to represent components on electrical diagrams:
This is a symbol
representing closed Switch – open
This is a symbol
representing
Resistor
Singe cell
This is a symbol
representing
ammeter
Light bulb
This is a symbol
representing fuse Voltmeter
3. What are the conventions and used in and the features of circuit diagrams?
Circuit diagrams using standard symbols are depicted in standard format for representing the
electrical components to ensure that all workers interpret it same using the diagram. Circuit diagram
has following components that are;
 Power source
 Load
 Conductors
 Ground
 Protection devices and
 Device control
Circuit diagram features includes;
 All connection is in order.
 The main elements are standard symbols
4. What is required to convert a circuit diagram to a wiring diagram?
For the conversion of circuit diagram to wiring diagram it is important to calculate all of the
components and parts so as to determine the terminal connection, required switches and other
connection requirements for ensuring wiring diagram that includes all the necessary information to
notify electrical task at pointer.

5. What is a cable schedule?
It is a file that incorporates the list of cables needed to complete the wiring task, specific circuit and
installation. It is mainly used for the following purpose;
 Carrying the installation procedure planning
 Material and resource selection
 Length determination approximation.
6. What information will be listed on the cable schedule regarding each of the cables
included?
For the cables there are following information which is listed in the cable scheduler that are;
 Each cable type
 Each cable length
 Each cable size and gland type
 Size of cable
 Serial number of cable
 Each cable details like source, destination and end point.
7. What steps are involved in developing a cable schedule for a given installation?
When the cable schedule is developed for the specific installation it is required to follow some
important steps that are;
 Identification of all required cable routes and access points.
 Entire Cable list
 Identifying the cable needed for different connections.
 Entire cable specification list.
 All connections requirements are identified
 Neat and easy list of table that contains the above mentioned information.

Task 3 - Circuit diagrams
1. What is the purpose of circuit diagrams in the electro technology industry?
Circuit diagram has several purposes to demonstrate electrical workers in the electro technology
industry that are;
 Circuit basic components
 Set up order
Circuits are used to;
 Calculate circuits
 Resource identification
 Troubleshoot circuit
 Safety analysis to be conducted
 Electrical work needs to be plan
2. Draw and label a basic circuit diagram showing at least three components
3. What are the steps that need to be conducted in order to develop a switching chart for
use when planning and conducting electrical work?
Developing the switching chart is the necessary procedure to identify different types of terminals.
The following steps are required to be followed for developing the switching g chart while
conducting and planning the electrical work;
 Positions of entire potential switching needs to be determined and documented.
 Entire switch need to be determined and documented.
 For ensuring the possible position of switch and combination of terminals a meter is used.
 Entire factors need to be placed in the columns.
4. What needs to be kept in mind when preparing to connect equipment using circuit
diagrams?

It is viable to interface equip the usage of circuit plots yet it could be crucial to manual an extent of
other facts and play out an volume of tests and estimations too that allows to ensure that maximum
of the requirements of the circuit are met as circuit graphs won't show each and every terminal
affiliation and purposes of intrigue.

Task 4 - Wiring diagrams
1. What is the purpose of wiring diagrams in the electro technology industry?
The purpose of wiring circuits is to provide easy graphical presentation of entire electric and circuit
installations. Following are the purpose of wiring diagrams;
 It helps in plans for depicting lighting
 It helps in depicting plans for house wiring
 It helps in depicting plans for system wiring
 It helps in depicting plans for device wiring.
2. What conventions are used in wiring diagrams?
Wiring diagrams are depicted through the standard symbols in standard format for representing the
electrical parts for ensuring that all workers are interpreting same using the diagrams.
3. What are the features of wiring diagrams?
Wiring diagrams have several features that are;
 Relationship among the connections
 Wiring plan basic structure
 All connections basic symbols
 Technical connections
4. What can sketch basic wiring assist with?
Many workers of the electrical will do freehand drawing of the wiring diagram for gaining the
graphical understanding of system and electrical plan they are working with;
Sketching of basic wiring diagrams;
 Needs to be basic
 It can assist in developing and planning of the wiring systems
 Troubleshooting can be assisted.
 It can be done through standard symbols.
5. Draw or define the following to complete the table of Australian standard symbols
used in wiring diagrams
This is a symbol
representing
electrolytic capacitor
Variable capacitor

This is a symbol
representing iron
core transformers
Headphones (double)
This is a symbol
representing general
antenna
Telegraph key

Task 5 - Building construction drawings and diagrams
1. List and briefly describe the four building types that electrical work may need to be
conducted within.
There are several building types that is needed by electrical work that are;
Timber frame: it is a building made from the frame of wooden components which is connected
professionally together such that it provides a building that structurally sound which is externally
and internally cladded for completion.
Brick veneer: it is the timber frame arrangement which is cladded through a non-structured plane
brick wall. It is the most basic type of building.
Double brick: it is the strongest and well-insulated type of building which is made from the two
strong brick structured walls along with left cavity among them.
Metal frame: it is the strongest and constructed through the skeleton frame made by metal by
arranging the steel columns vertically and metal beams horizontally in cross section direction to
construct a grid arrangement. Using the metal frame skyscraper are made as using this building type
tall buildings can be constructed.
2. List two examples of each of the following:
a. Footings
Examples of footings are stepped and stump pad.
b. Floors
Examples of floors are platform floors and cut-in floors.
c. External walls
Examples of external walls are brick veneer and metal cladding
d. Roofs
Examples of roofs are gable and hip.
e. Interior walls
Examples of interior walls are tiles and mortar.
3. List and describe two types of typical cable routes through buildings, structures and
premises.
Two types of typical cables are backbone cabling and Entrance facilities

4. Detail the sequence of each constructional stage for one of the following: brick, brick
veneer or timber cottage
Brick veneer construction stage
5. At what stage of construction does first fixing occur?
First fitting happens once the entire external door, roofs, and fitting gets done so that building gets
assembled but not completed. The cable route gets lay out throughout the building by the
electrician during this fitting through the main power supply.
6. At what stage of construction does second fixing occur?
This fitting happens once the supply of electrical gets conducted in constructional sequence. Once
the entire walls and insulations gets placed, the final light fitting, wired devices and power outlets
gets connected will get conducted throughout the home.
7. Who are some of the personnel and trades you may need to communicate with during
the construction process of a home?
During the home construction process it is required to communicate with some trades and
personnel’s that are;
 Client
 Carpenters
 Plumbers
 Architect
 Builders
 Construction manager
 Wholesaler of electrical and
Underfloor
plumbing
Underfloor
wiring
Excavation of
footings
Brick base
Termite
treatment
Concrete slab Floor plumbing
Floor frame
Wall frame
Roof trusses
Window and
door frames
Roof and
guttering Roof covering
Brick walls
External doors
Wiring
Telephone
Gas Brick cleaning
Wet area
preparation
Wall insulation
Internal lining
Joinery and
internal fit out
Painting
internal Final plumbing
Final electrician
Telephone
Ceiling
insulation
Finishing’s

 Tradespeople present on the site

Task 6 - Regulation for undertaking electrical work
7. What are the 6 types of electrical licences in Australia?
In Australia six types of licences are there for electrical that is as follows;
Electrical linesperson licence that allows the holder to test, maintain and analyse the overhead
electrical connections.
Electrical mechanic license that allows its holder to alter, install and repair the electrical
equipment’s and completes the wiring.
Electrical jointer license allows its holder to perform termination an jointing of the cables having
high voltage.
Electrical work training permit allows its holder to supervise the work related to electrical during
complete formal training of electrical.
Restricted electrical work license allows its holder to perform the task legally that is associated with
the trade listing of legitimate trades.
Electrical fitter licence allows its holder to perform following task legally that is switchboard
construction and assembling, repair or rewinding of the electric motor and repairing and maintaining
the electrical devices.
8. What are the fundamental principles of an electrical installation that are outlined in
AS/NZS3000?
In AS/NZS3000 the fundamental principles that are outlines are;
 Person, property and livestock must be protected from the risk.
 As intended functioning must be correct
 At the time of fault inconvenience must be minimize
 Operate and connect safely and must be electrical distributive system compatible.
 Safe inspection, operation, maintenance and testing must be facilitated.
9. Discuss the certification of electrical work
The entire electrical work after the completion needs the certification that includes the COC
certificate. Certificate of compliance (COC) needs to be gathered from the wholesaler of electrical
and needs to be complete each time addition, Updation, work and alterations is conducted. COC
form has unique identification number of its own from the contractor of electrical who has
conducted the task.

Task 7 - Standards philosophy and format
1. Define the following:
a. Performance standards
It is the standard that sets the objective that needs to be attained with no explanation provided on
how to carry out tis.
b. Prescriptive standards
It is that standard which provides explanation and details about the process of how to attain the
objective.
2. What is the purpose of technical standards?
A) Principles which are utilized to identify requirements to gain the least minimal goals of Safety,
service or product performance. These Principles might be advanced for obligatory or voluntary
requests.
B) Contractual motive – Principles that assist as buying specs or technical situations of agreement
among parties.
c) Regulatory compliance – Principles that specifies minimal least-value answers to technical
necessities expressing traits, design and performance and standards like-minded along with the
utility of rules.
3. How are technical standards developed?
To develop the Australia technical standards firstly the standards are passed by the development
process in the collaboration range with the territory and state government, industry professionals,
licensing authorities and incorporates the formal development and procedure review by an
appointed panel previously that is capable of submitting the inclusions as formal standards of
Australia.
4. What is the ISO?
ISO is an acronym for the international organization for standardization which is an independent
organization which works along with the regulatory bodies and agencies to create and identify the
standards or principles which could be referred for ensuring that the prepared user documentation
is appropriate or not with the standards.
5. What is the IEC?
IEC an acronym for the international electro technical commission is a leading organisation
worldwide. It basically prepares and publishes all the electronic, electrical and related techniques
standards.
6. How are standards used in compulsory and accreditation compliance schemes?

While principles are not required without anyone else there are regularly built into enactment and
work codes, making them compulsory in many situations. It’s a basic that every required standard
are built into necessary accreditation and consistence plans. The Australian norms are likewise an
astounding method for guaranteeing that obligatory and accreditation plans are of the right
standard for every industry composes.
7. What information is included in electrical technical standards?
The information that needs to be incorporated in the technical standards of electrical are;
 Requirements for safety
 Standards for product quality
 Drawings and communications
 Electrical work kind during different cases.
 Requirements for testing
 Specification
8. What do you need to keep in mind when reading and applying standards?
When perusing and making use of recommendations it will likely be important to assure that the
part of the facts that relates to a selected career is perused and comprehended to assure that all
components of the usual that relates to every particular pastime task may be connected to the
assignment. Tasks and strategies of job have to be composed to include the greater part of the
constraints which can be inside the Australian models when needed by means of enactment,
controls, and education practices or authoritative requirements.
9. List at least six standards and codes that apply to all types of electrical installations
Six standards that need to be applied by all electrical installations are;
 Works - Electrical Safety Code of Practice 2010
 Wiring Rules - AS/NZS 3000
 Electrical lines Underground and working around overhead- Electrical Safety Code of
Practice 2013
 Rural industry electrical equipment- Electrical Safety Code of Practice 2010.
 AS/NZS 1102 AUSTRALIAN DRAWING STANDARD AS/NZS 1102 is a drawing standard of
Australia.
 Sites demolition and construction- AS/NZS 3012 Electrical installations
10. What is the state mandated Standards and regulations that you need to follow in your
workplace?
The mandate principles and standards that need to be followed at the workplace are;
 Wiring rules AS/NZS 3000.
 Territory and state government service rules.

11. Discuss two of the Codes applicable to electrical safe working practices.
Two codes that are applicable for safe electrical practices are
 Code of practice 2011- for managing the safety and health risk
 Building act (BCA) having two volumes.

Task 8 - Purpose, format and content of typical job specifications
1. Discuss the NATSPEC specification system
It is a web based access portal for enabling those who works in construction industry in diverse
zones that includes electrical worker to build the detail list of job specification having specification of
the various preprogramed work which is applicable on different sectors of industry. The system is in
the block format. Its main objective is to give detailed and consistent system that can easily be
included in pre-prepared records of the construction industry.
2. What sections are included on common workplace job specification templates?
Template of Job specification includes following;
 Task essential components example: time, date and purpose.
 Job task summary
 Responsibilities and roles
 Requirements like license or qualification
 Standards
 Code of practice applicable
 Information regarding safety
 Requirement for performance
 Requirements for reporting
 Resources
 Legislation applicable

Questions
Questions
1.
There are 5 different levels of hierarchy control that is PPE, administrative control, engineering
controls, elimination and substitution.
 Elimination means to remove the hazard physically and it is the most preferred and
effective.
 Substitution means removing or replacing the element that creates hazard.
 Engineering controls mean protecting the individuals from the hazard.
 Administrative control means to change the working manner of the people.
 Final level that is personal protective equipment (PPE) means the safety equipment’s like
safety glasses, gloves etc. which is least preferred.
2.
There are many kind of diagrams that could be used for informing the work tasks that are;
 Wiring plan
 Work schedule
 Site plans
 Floor plans
 Construction phase schedules
 Block diagrams
3.
Every job specification must contain following;
 Job task summary
 Task essential components
 Standards
 Licensing and qualification requirements
 Code of practices that are applicable
 Safety information
 Resources
 Requirements of reporting
 Legislation applicable.

4.
The information is the important part of the organization. It could be both external and internal.
External information is hard to collect. To gather the information that is external to the organization
could be obtained by the secondary information sources like diagrams, plans, legislations, drawings
and standards.
 Items required are determined first
 Areas where items can be found are identified
 Workplace procedure gets evaluated
 Necessary forms and requests are put in
 Information access assets are obtained
 Information is gathered.
5.
For obtaining the job information using the drawings, manuals and schedules, firstly it is necessary
to analyse the diagram properly. And to read and find the task information associated with
workplace to identify what material and information is required for completing the job task
compliantly and safely.
6.
Following range of steps is needed;
 All available information and work task is interpret and access.
 All tasks get break down and required drawings and diagrams are considered.
 Different diagrams and schedules are interpreted and read.
 Unknown information is confirmed
 Work gets planned.
 Work gets conducted
7.
Wiring diagrams are used to make the different standard lines and symbols in format that will
explain all the components and connection required to carry out device or building wiring.
It is used for design, communication, planning, troubleshooting and installation.
8.
1:200, 1:100, 1:50 are basic standard fractions used for scaling the architecture diagrams.
 1/200th means the real item drawn would be 200 times larger than the drawing.
 1/100th means the real item drawn would be 100 times larger than the drawing.
 1/50th means the real item drawn would be 50 times larger than the drawing

9.
The typical manual contains the;
 contents
 diagrams
 equipment class or each task section
 For diverse work, specific detailed information.
 Appendixes
 Glossary
 Supporting information
10.
 Neat and easy understandable drawing is made.
 Conventions of Technical drawing are included correctly.
 Format and standard layout is followed by the drawing
 Drawing made is near to reasonable scale.
 All necessary inclusions and connections are made.
11.
 All drawings are transposed on scale
 Diagrams include standardized symbols
 Lines drawn are accurate
 While using standard conventions be present
 Connections and measurements are properly included and calculated.
12.
The complete drawing must be submitted for approval to the appropriate persons that are;
 Clients
 Local councils
 Supervisors
 Authorized representative of the business
 Wholesalers of Electrical
 Other trades people
13.
Electrical mechanic license: it is an open work licence of electrical that allows the holder to perform
some tasks that are;
 Electrical wiring completion
 Alter and install electric lines that are overhead.
 All kind of electrical device and equipment repairing.

Restricted electrical worker’s licence (REL): it also known as D licence allows the licence holder to
reconnect or disconnect low voltage installation of electrical related to;
 Related to primary occupation
 Equipment’s connected to stable electrical connection.
14.
It gets completed when the products encounter the safety, technical and regulatory set
requirements. It is needed on the product for selling the product. It gets completed at the time
when following actions get performed by the electrical installation like
 Alter
 Add
 Reconnect
 Disconnect
 Replace