Electrical Capstone Practical Exam. -Short Circuit Testing -Correct Installations / Fault Finding.

[@SparrowsFishing247]

G'day mate. Thank you so much for helping a heap of us get through our capstone. Cheers from Darwin NT.

[@theea3466]

So glad to hear bud.

[@nicolaamw9765]

sitting capstone in a week these videos have helped be prepared thank you

[@goodvibes0101]

Legend hopefully all is going well with your career and future videos of the floods were insightful hopefully all is ok now

[@aldee2396]

Hi Nicky, the exam sheet I was shown also states in the circuit connections section for a neutral-earth transpostion how would you test for this ?

[@theea3466]

Hi Al Dee, Great question and I'll try to answer the best way I can. For the record I'm not a qualified electrician yet and don't claim to be an expert. Specifically Neutral-earth transpositions can be tested by: 1) Confirming all earthing on apparatus is connected to your earth bar ( Earth continuity) 2) Testing Polarity of your Neutral to Earth using known resistors or continuity method. 3) Testing for no interconnected Neutrals Now correct connections in general also go a few steps further. 4) Test Active to Neutral is consistent with the load and that the switch is actually switching the apparatus off. For example a Powerpoint will have varying resistance while the known resistors are joined. A....(R1)....E...(R2)....N Switch ON AN =R1 + R2 AE = R1 NE= R2 Switch OFF AN =OL AE = OL NE= R2 If you have a single phase 3.6kW HWS you are Testing Active to Neutral and comparing the resistance to the expected calculated resistance of 230²/3600 =14.7 Ohms. P=V²/R so R=V²/P 5) Testing resistance either by continuity or known resistors of the apparatus at the switch and at RCD/ CBs. Correct connections are about a switch and RCD/CB being connected to the apparatus as labelled. 6) If there is 3 phases (which I'm sure there will be) Testing for continuity each phase is correctly connected. Example...Go from L1 on load side switched off CB to a switched on 3phase outlet then again for L2 and L3 respectively. Red White Blue cable is a colour identifier but never make assumptions about coloured cable if you can't see it's entire length. Test it! The key is to understand exactly what you are testing, this way if you get a fault you know exactly how to isolate and find the fault. Check out 3.4 on Page 29 of the AS/NZ3017:2007 Also Figure 1.1 Page 7 shows that 'correct connection' is incorporated into the polarity section of the testing sequence. I hope this helps and good luck.

[@aldee2396]

Thank You for clearing that up :)

[@jackmcconnell8471]

Hi Nicky, ive got a Kyoritsu snap ,meter thats a few months old.it doesn't make the beeping noise when testing resistance. does this matter or should i take a different meter into my exam?

[@theea3466]

So many kyoritsu meters. You'll need to use a Meggar for Insulation resistance. They may provide one for you. Find out what brand they use and be familiar with it. You'll need to know how to calibrate it and test the voltage. In regards to the beep... Totally fine. The beeping is good when testing continuity it means you know there is a path without having to look at your screen. You'll just have to check by viewing the reading that you have resistance for continuity. With all other test you need to read your results and determine if the reading is appropriate.