Course 7: Electronics

Course 7: Electronics

Wireways Topic 4 Water Heater Supply Scenario All copyright and intellectual property rights in respect of materials developed by the service provider during this project will vest in the Department of Higher Education and Training, which will have the right to allow any individual, company, agency or organisation to use or modify the materials for any purpose approved by this Department, including selling the materials or releasing them as Open Educational Resources (OER) under an appropriate copyright license. Assumed prior learning Fundamentals of electricity Safety, health environment, risk and the quality principles in the workplace The use of hand and power tools and applicable safety requirements Measuring and testing methodologies (electrical and mechanical) Introduction to the world of work and the electrical trade Dont feel confident yet about these topics? Click on each to review the content. Feeling confident? Click next to proceed with this unit. Disclaimer No person may authorize, design, install or permit or require the installation of an electrical installation, other than in accordance with a health and safety standard incorporated into these

Regulations under section 44 of the Act. (Electrical installation regulations section 5) No person may do electrical installation work as an electrical contractor unless that person has been registered as an electrical contractor in terms of these Regulations (Electrical installation regulations section 6) It must be noted that in terms of Occupational Health & Safety Act all electrical construction work must be conducted under the general control of the registered person, and in terms of this criteria you will not be allowed to work in the distribution board. You will be permitted under the general control of this registered person to do the following work. (Electrical installation regulations section 5) The registered person will be responsible for issuing the certificate of compliance for this addition to the electrical installation, after he has inspected and tested the electrical installation. (Electrical installation regulations section 9) During this exercise we will be providing 3 options to provide supply to a gate motor, we are aware that there are many more options and these will be influenced by finance, time, environment and skill. It must be noted that any other installation must comply to the regulations, standards and manufactures specifications. I have read and understood all points contained in the Disclaimer. Scenario Outcomes By the of this unit, you will be able to: 1. Plan a job and understand the regulations applicable to the specific task 2. Select and apply the correct tools for the task 3. Conduct a risk assessment for the task

4. Prepare the worksite 5. Install equipment and materials according to relevant standards, and manufacturer requirements 6. Conduct the required tests for an alteration of an electrical supply 7. Interact with and provide feedback to the client Glossary Add words and terms here. Supply for a water heater (geyser) Introduction In this scenario, you will work through eight key steps. 2 1

3 Move over each step to find out more. Then, click Next to get started with Step 1. 5 6 4 7 8 1

2 3 4 5 6 7 8 Step 1- Client brief You have just received a call from Mr Pretorius. He has just replaced his burst water heater and needs you, a qualified electrician, to provide power at the gate for the water heater urgently. Click on the speaker icon to replay

the conversation. TIP: Listen carefully to what Mr Pretorius has to say. You will need to answer a question soon after. 1 Hello, this is Ted Pretorius. Are you John of Expert Electricians? 3 I need you to provide a supply for my water heater and its rather urgent. Yes. How can I help you? 2 4 I see. When do you need the job done by? 6 That should not be a problem. My team and I can have the work done by the end of the week. What else can you tell me? Do you have any constraints?

5 I am expecting visitors over the week-end, so need you to complete the job in two days. The sooner you can start, the better! 7 8 Of course! We are committed to adhering Great to hear! The insurance is not going to cover this work, so I need you conduct the work in the cheapest way possible, while still adhering to all the required regulations and standards. 9 Please make sure that activities do not damage the walls or look unsightly. You are also not allowed to chase the walls or damage ceiling boards. You can get

the supply from any point in the installation as long as it is compliant. 11 Yes, that would be great. One more thing, I will need you to provide a certificate of compliance when the job is done. to all regulations as well as health and safety standards. Do you have any requests about how we need to do the work? Or where my team and I can get the supply? 10 No problem. Will you be available tomorrow so my team and I can do a property visit? 12

Of course! See you tomorrow Mr Pretorius! Client brief Did you listen carefully to what your client said? You will be given a list of details from the conversation. Choose all the correct details from this list and click SUBMIT when you are finished. See client details Client brief The project must follow all regulations and standards You do not need to provide Mr Pretorius with a certificate of compliance Health and safety regulations must be complied to at all times You can get the supply from any point in the installation as long as it is compliant

Activities must not damage the walls and must not look unsightly You are allowed to chase the walls and damage ceiling boards You must finish all the work in 7 days Financial resources are very limited and you need to do the work as cheap as possible SUBMIT Client brief Lets review the details that Mr Pretorius gave you over the phone. Click on each of the blocks below to find out more. You will need this information for the remainder of the steps in this scenario.

Mr Pretoriuss property Now that you know what your client wants, you need to find out specific details about the property. You can do this by visiting the property before you begin the job. This helps with your planning. Watch this video to learn more information about the property. Placeholder for Vid01: Property Details Summary of property details Property Details Cant remember all the property details? Click on the boxes below to refresh your mind. Tip: Keep the client and property details handy for future reference. Click here to download.

1 2 3 4 5 6 7 8 Step 2- Choose the best option Factors to consider:

In this step you first need to weigh up the options and decide which will be the best approach to take. A number of factors could affect your decision. Possible risks 1 Environmental conditions 2 8 of tools

3Availability and Equipment Regulation codes and standards 7 Move over each item to find out what these factors are 6 Availability of labour 4 5 Time constraints

Availability of materials Step 2- Choose the best option You have three possible options available to you when providing the supply for Mr Pretoriuss water supply. Take a look at the options below. You will soon need to decide which option is the best for this job. TIP: Keep in mind the information that your client told you and the property details. Option 1 Option 2 Option 3 Op to b

Op to b Stop and reflect So far, which option do you think might be the best for installing the supply for your clients water heater supply.? Move the slider scale to indicate which optionOPTION you believe is Good, Better and Best 2 OPTION 1 OPTION 2 OPTION 3 Image placeholder to represent option 1

Image placeholder to represent option 2 Image placeholder to represent option 3 GOOD BETTER BEST GOOD BETTER BEST GOOD BETTER

BEST Stop and reflect You chose Option X as the best option for the job. Why? Type a reason in the text area below and click submit. Submit Factors to consider We know that there are a number of factors will affect the option you finally choose to complete the job. Review each option to see what you need to consider. Option 1 Option 2

What to Consider? Cost Environmental Tools & conditions Equipment Materials Option 3 Time Labour Codes and Standards Possible risks

Op to b Option 1: Details Use 2,5mm Norsk (2+E) cable to supply a isolator that will allow the water heater to be supplied from. Click on each of the boxes to find out more. Tools and equipment Materials Cost Regulations Time

Labour Environmental implications Risk implications Go Back Option 2: Details Use 2,5mm flat twin and earth (2+E) cable to supply a isolator that will allow the water heater to be supplied from. Click on each of the boxes to find out more. Tools and equipment Materials Cost

Regulations Time Labour Environmental implications Risk implications Go Back De Option 3: Details Use 2,5mm Norsk (2+E) cable to supply a isolator that will allow the water heater to be supplied from.

Click on each of the boxes to find out more. Tools and equipment Materials Cost Regulations Time Labour Environmental implications Risk implications

Go Back Advantages and Disadvantages Before you choose the best option for this job, you should weigh up the advantages and disadvantages. Click on each option to view. Advantages OPTION 1 OPTION 2 Image placeholder to represent option 1 Image placeholder to represent option 2 OPTION 3 Image placeholder to represent option 3

Disadvantages Choose the best option Time to select the best option for this job. Choose an answer and click submit. You may review the options before deciding. Option 1 Option 2 Option 3 Submit 1 2 3

4 5 6 7 8 Step 3- Plan the job As Option 1 is the most cost effective option, we will use it for the rest of the scenario. But how do you even begin to think about all the things you will need to do the job..? Watch this video for advice from an experienced electrician on how to properly plan for a job.

Placeholder video: How to plan for the job, must include info about working through the steps in your head and thinking about what you will need for each step to make sure you dont miss anything. Must discuss tools, equipment, materials, PPE. Its an overview. 1 2 3 4 5 6

7 8 Step 3- Plan the job Lets review what needs to be done as part of proper job planning. Draw your plan Select tools and equipment Select materials Select PPE Draw your plan The plan is used by you and your

team when you go to a clients property. Take a look at this video which explains how the plan is created. Placeholder-Video 05 Draw your plan You are going to now draw your OWN plan for Option 1. Use the property details, job instructions and video for Option 1 to draw your own plan. You can use paper or a computer programme to make your drawing. Mr Pretoriuss property details Step by step instructions

Video of Option 1 I need help with drawing my plan Upload your plan Submit your plan so that it can be saved in your ePortfolio. Upload your plan and click submit. Submit The completed plan How does your completed plan look? Your plan should resemble something like this. Identify tools and equipment Which tools do you think are needed to complete this job? Click on each tool to find out more about its purpose. Then, drag and drop

your chosen tools into the tool box. Hammer Screwdriver (terminal, flat, star) Pliers Placeholder for another tool Placeholder for another tool Side cutter Placeholder for another tool

Placeholder for another tool Wire strippers Fish tape Ladder Placeholder for another tool Submit Tools for the job Not too sure which tools were required? Dont worry, we have listed them here again. Mouse over each one to review their intended use. Hammer Image of a

hammer Short description of what a hammer does. Materials In order to complete this job you will need materials such as wires and connectors. Click on each box below to see more information. 12 meters of 2,5mm flat twin and earth 1 x Isolator enclosure complete 2,5mm saddles

20A Circuit breaker 3KA Label (water heater/geyser) Personal protective equipment (PPE) When completing a job you must always make sure that you are protecting yourself and the people who are working with you. One of the ways you do that is by making sure you and your team are wearing the correcting personal protective equipment or PPE. Watch this video on PPE to find out why its so important. Placeholder-Video 06 - PPE Select the correct PPE Choose the PPE you think

you would need for this job. Drag and drop the items onto the image of the electrician. Click submit once you are done. Tip: Not sure what each item is used for? Click on each to view a description first. Submit 1 2 3 4

5 6 7 8 Step 4 - Follow rules and regulations Another name for rules and regulations is codes. As an electrician you need to follow the SANS (South African National Standards) codes. These can be tricky to understand at first. Watch the video to find out how to read and apply a SANS code correctly. Placeholder: Video o7 and Vid 08 combined into 1

Multiple choice Choose the correct answer from the options below. Add question based on Vid 07 and 08 scripts (Dave Gravett) Examples of questions: What is the best way to read the code? When reading the code you should focus on which part? What parts are not important? Do codes get updated? Then what? SANS Codes There is one SANS code that you need to be aware of when installing the supply for a water heater. Click on the code to find out what it covers. You will be asked questions about it in the next activity. SANS 10142-1 SANS 10142-1 Read through the document below and then click on the Next button to answer some questions about this code.

Scrollable text. Multiple choice Insert questions from Dave Gravette here Verify that the voltage drop are within the permitted range Verify that the method of installation is expectable of cable installation is applied. OHS ACT 1 2 3 4 5

6 7 8 Step 5- Do a risk assessment A risk assessment involves taking a careful look at your workplace to identify those things, situations and processes that could put you or your team in danger. You should always do a risk assessment before you begin any job. Cant remember what a risk assessment is? Watch the video to refresh your mind. Placeholder: Video 9 and Video 10 combined into one video on Risk

assessment Step 5- Identify the risks Time to have some fun and identify some potential risks. From the list below, match the task with a potential risk when installing the supply for a water heater. Add tasks and risks 1 2 3 4 5 6

7 8 Step 6- Complete the job Well done on getting this far! To complete the job for your client (and correctly provide the supply for Mr Pretoriuss water heater), you need to now carry out the tasks required. Watch the videos to see how each task is performed. Task 1 Task 2 Task 3 Task 4 Task 5

Task 6 Task 7 task 8 Task 9 Task 10 Task 11 Step 6- Complete the job Oh No! These steps for installing the supply for the water heater are not in the correct order! Drag and drop them into the correct sequence. Click submit when you are done. Measure, mark and mount a flush mount enclosure in a roof onto a

rafter within arms reach of the water heater Connect an appliance using norsk cable into an enclosure Drill a hole using a holesaw in enclosure for a gland Conduct relevant tests Saddling multicore cable onto wood or rafters to DB1 Switch off supply to DB1 and test to ensure safe to work Submit

1 2 3 4 5 6 7 8 Step 7- Check job done correctly Once you have completed the job you must check that everything was done correctly.

Click on each block below to see what you should check for this job. Placeholder image representing relevant text Placeholder image representing relevant text Placeholder image representing relevant text Placeholder image representing relevant text Placeholder image representing

relevant text Placeholder image representing relevant text Step 7- Check job done correctly Need Dave/Nicks help in building out the values that would be needed here In addition to checking the elements, you must make sure that the No Voltage Tests and Voltage On Tests are completed. No Voltage Tests Continuity of the earth conductor Voltage On Tests

Placeholder: Insulation resistance test Simulation: Polarity Test Simulation: Voltage Test Simulation Elevated Voltage to Neutral test 1 2 3

4 5 6 7 8 Step 8- Handover to client You are almost finished installing the power supply Mr Pretoriuss water heater. The final step is to show your client what you have done and provide the Certificate of Compliance (COC). Watch the videos to find out about COCs and to see how a client handover is done. Placeholder for Video on Handover

Placeholder for Video on Handover Conclusion Congratulations! You have now worked through the entire scenario for installing a water heater supply. There are 5 more scenarios for you to try, would you like to try one now? ICONS REQUIRED ICON REQUIRED ICON PURPOSE Outcomes

Icon to represent Learning Outcomes Extra Information Icon to represent Additional Information Instruction Icon/ Or actual person to represent an Instruction (something learner needs to do) Tip Icon to represent a hint or tip Glossary Icon to represent Glossary Page

Reflection Icon to represent Reflection Example: Animated scenario: 01: Client brief Voice of an middle-aged white male, speaking over a phone with the electrician: 1. Client: Hello, this is Ted Pretorius. Are you John of Expert Electricians? 2. Electrician: Yes. How can I help you? 3.

Client: I need you to provide a supply for my water heater and its rather urgent. 4. Electrician: I see. When do you need the job done by? 5. Client: I am expecting visitors over the week-end, so need you to complete the job in two days. The sooner you can start, the better! 6. Electrician: That should not be a problem. My team and I can have the work done by the end of the week. What else can you tell me? Do you have any constraints? 7. Client: Great to hear! The insurance is not going to cover this work, so I need you conduct the work in the cheapest way possible, while still adhering to all the required regulations and standards.

8. Electrician: Of course! We are committed to adhering to all regulations as well as health and safety standards. Do you have any requests about how we need to do the work? Or where my team and I can get the supply? 9. Client: Please make sure that activities do not damage the walls or look unsightly. You are also not allowed to chase the walls or damage ceiling boards. You can get the supply from any point in the installation as long as it is compliant. 10. Electrician: No problem. Will you be available tomorrow so my team and I can do a property visit? 11. Client: Yes, that would be great. One more thing, I will need you to provide a certificate of compliance when the job is done. 12. Electrician: Of course! See you tomorrow Mr Pretorius! Vid 01: Property details Animated video using a tool like GoAnimate. Black and white hand drawn images with a voice over. Each point should be on a separate slide. Script for voice over: When you visited Mr Pretoriuss property, here is what you found:

There are 2 DBs . One in the main house (BD 1), which is flush mounted and one in the garage (BD 2), which is surface mounted. The heater that has been installed by the plumber is 8 meters from DB1. There are 2 slots available in the DB for new circuit breakers and there is an earth leakage in board The heater is 16 meters from the DB2. There are 9 slots available in the DB for new circuit breakers and there is an earth leakage in board The roof is pitched and easy to move around There are spare pipes in the wall to feed the supply from the DBs into the roof space The water heater is 2kw and is used for the kitchen The supply must be at least 2,5mm wire as the current is 9,66 amps for the water heater The protection will need to be a 20A circuit breaker There is no ceiling in the garage There are dogs on the property There are toilet facilities for staff Vid 02: Step 2 Option 1 Demonstration video with voice over and text banners appearing as action on the video is completed. Use 2,5mm Norsk (2+E) cable to supply a isolator that will allow the water heater to be supplied from 1. 2.

3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Measure, mark and mount a flush mount enclosure in a roof onto a rafter within arms reach of the water heater Connect GP conductors to isolator Drill a hole using a holesaw in enclosure for a gland Connect an appliance using norsk cable into an enclosure Using cable clips Saddling multicore cable onto wood or rafters to DB1 We will draw in the cable into the spare conduit into the DB1 Strip sheath off cable allowing sufficient length for cores to reach the new circuit breaker as well as earth and neutral bars

NOTE : always leave some slack in the wire minimum 200mm Switch off supply to DB1 and test to ensure safe to work Fit 20 Amp circuit breaker in DB and connect supply from earth leakage supply to circuit breaker Connect supply from earth leakage supply to circuit breaker to new water heater supply in BD Conduct relevant tests Complete COC Hand over to client Vid 03: Step 2 Option 2 Demonstration video with voice over and text banners appearing as action on the video is completed. Use 2,5mm flat twin and earth (2+E) cable to supply a isolator that will allow the water heater to be supplied from 1. 2. 3. 4. 5. 6.

7. 8. 9. 10. 11. 12. 13. Mount the isolator enclosure onto a rafter within arms reach of the water heater Switch off supply to DB1 and test to ensure safe to work Connect conductors to isolator Drill 20mm hole in enclosure for the gland Fit a PVC gland onto enclosure Using cable clips saddle flat twin and earth cable to rafters to DB1 We will draw in the cable into the spare conduit into the DB1 Strip sheath off cable allowing sufficient length for cores to reach the new circuit breaker as well as earth and neutral bars NOTE : always leave some slack in the wire minimum 200mm Fit 20 Amp circuit breaker in DB and connect supply from earth leakage supply to circuit breaker Connect new water heater supply conductors in BD

Conduct relevant tests Complete COC Hand over to client Vid 04: Step 2 Option 3 Demonstration video with voice over and text banners appearing as action on the video is completed. Use 2,5mm Norsk (2+E) cable to supply a isolator that will allow the water heater to be supplied from 1. 2. 3. 4. 5. Switch off supply to DB1 and test to ensure safe to work Connect conductors to water heater Using cable clips saddle norsk cable to rafters to DB1 We will draw in the cable into the spare conduit into the DB1 Strip sheath off cable allowing sufficient length for cores to reach the new circuit breaker as well as earth and

neutral bars. NOTE : always leave some slack in the wire minimum 200mm 6. Fit 20 Amp circuit breaker in DB and connect supply from earth leakage supply to circuit breaker 7. Connect new water heater supply conductors in BD 8. Conduct relevant tests 9. Complete COC 10. Hand over to client NOTE there must be an isolator on a water heater installation within arms reach regulation Vid 05: How to draw a plan Demonstration video with electrician talking to the learner about how to do the plan, interspersed with screenshots of him doing the plan. This link can be used as a basis: https://www.bhg.com/home-improvement/electrical/how-to-draw-electrical-plans/ Vid 6: Personal protective equipment An animated video discussing the following: What is PPE Why do we wear it? What are the most common PPE for electricians? Where can you find/buy PPE? (Is it your responsibility or that of your employer?

Vid 07: Overview of the SANS codes and how they work Animated video using a tool like GoAnimate. Black and white hand drawn images with a voice over. SANS, refers to a standard that specifies the performance requirements of a specific product. A SANS standard may be either locally written or created by adopting an international (usually ISO) standard . What does a SANS code look like? Why do we have them? Where can we access them? What happens when the code changes? Does this happen often?

Vid 08: Overview of the SANS codes and how they work Demonstration video. Take an example of a SANS code (ie SANS 10142). Video should alternate between showing the facilitator talking and screenshots of the SANS code as demonstrator highlights various aspects of it. Information that should be covered in this video: How do we read a SANS code? (Highlight important info in the document for learner) How to we apply the SANS code? Vid 9:Risk Assessment An animated video discussing the following: A risk assessment is a term used to describe the overall process or method where you: 1. Identify hazards and risk factors that have the potential to cause harm (hazard identification). 2. Analyse and evaluate the risk associated with that hazard (risk analysis, and risk evaluation). 3. Determine appropriate ways to eliminate the hazard, or control the risk when the hazard cannot be eliminated (risk control). 4. A risk assessment is a thorough look at your workplace to identify those things, situations, processes, etc. that may cause harm, particularly to people. After identification is made, you analyse and evaluate how likely and severe the risk is. When this determination is made, you

can next, decide what measures should be in place to effectively eliminate or control the harm from happening. Vid 10: 5 Steps of doing a Risk Assessment An animated video discussing the following: 1. ACTIVITY 2. HAZARD 3. DANGER 4. RISK (without preventative measures) 5. PREVENTIVE MEASURE Must mention the difference between a hazard and a danger. Video example for each task : Complete the task Demonstration Video showing: 1.Drill a hole in a wall (Module 19) Video : Client Handover Demonstration Video showing the electrician interacting with the client:

1. Conduct walk about with client showing: the route of the wire way of installation Indicate the positioning of the breaker and where it is installed. Provide the client with the certificate of compliance (COC) as per legislation explaining its purpose as well clients responsibility in terms of maintain the electrical installation Video : COC Discussion with qualified electrician discussing the following: What is a COC? Who can issue a COC? What does a COC look like? How long is a COC valid for? Resource 01: Client brief and property details Client Brief: The project must follow all regulations and standards

You need to provide the client with a certificate of compliance Health and safety regulations must be complied to at all times You can get the supply from any point in the installation as long as it is compliant Activities must NOT damage the walls or look unsightly You are NOT allowed to chase the walls and damage ceiling boards You must finish all the work in 2 days Financial resources are very limited and you need to do the work as cheap as possible Placeholder for visual representation/diagram of property details Property details:

There are 2 DBs . One in the main house (BD 1), which is flush mounted and one in the garage (BD 2), which is surface mounted. The heater that has been installed by the plumber is 8 meters from DB1. There are 2 slots available in the DB for new circuit breakers and there is an earth leakage in board The heater is 16 meters from the DB2. There are 9 slots available in the DB for new circuit breakers and there is an earth leakage in board The roof is pitched and easy to move around There are spare pipes in the wall to feed the supply from the DBs into the roof space The water heater is 2kw and is used for the kitchen The supply must be at least 2,5mm wire as the current is 9,66 amps for the water heater The protection will need to be a 20A circuit breaker There is no ceiling in the garage There are dogs on the property There are toilet facilities for staff

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