Exposed Conductive Parts and Proving They are Connected to the CPC (Earth)
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- Опубліковано 31 січ 2018
- Students training aid for testing continuity of the CPC to the exposed conductive parts and polarity of lighting circuit includes full demonstration
🔵 The 2 plate method of wiring lighting circuits playlist • Taking the Feed (Suppl...
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Excellent presentation and very clear thank you
Thanks 👍🏻
Yes always good helpful videos fro GSH Electrical
Can’t fault any of your videos. Great work all!
Hi kind words however the early ones are poor but I now have better microphones and apps so the product is improving. Keep watching and commenting Gaz 🙌
i fitted a metal light switch and was connecting cpc from backbox to the face plate and as this was the 3rd cpc cable couldn't get it into the wee hole for the cpc on the backbox, as 2 were already there in the hole . how do i it in this circumstance? not enuff room to fit cpc into the screw down part
Is there any reason why the readings were jumping around when you tested the fluorescent fitting? And what reading would you chose if it keeps jumping higher or lower?
Hi thanks for the question... me sadly as I am trying to talk I am not pressing hard enough on the connection so sorry Gaz
The readings might jump about as Gaz said, through poor contact being made at point of measurement or the batteries in your test equipment may be low. If you have good contact on the terminals and the batteries are good, then try swapping the test leads. You must wait for the reading to settle before recording your results.
Alvin Ashman hi we have to max out our battery use at college as we have a limited budget.... I will pay more attention from now on Gaz
GSH Electrical- I understand that Gaz, I don't think the test equipment was fluctuating because of low batteries, I just thought I offer another suggestion as to why the meter reading could be jumping about, not necessarily on your meter but the meters of your subscribers. Out of all the test on a multifunction tester, the continuity test uses the most power.
Hi thanks for this video... But what if we have a dead short of the line conductor and not the cpc and the exposed metal parts of the light fitting... Wouldn't it be better to check the cpc right from the fuseboard to the light?!
And what if we miss that short fault but then the insulation resistance test will (hopefully) fail and after fixing we'll have to do this test again?
Hi. Thanks for the question but I am not quite sure what you are asking me. GSH Electrical
GSH Electrical thank you... Sorry for beeing unclear..
I'll try again
You bridged the line and PE in the fuseboard
You check the Continuity of PE by probing the Line (red wire) to the metal case (green wire)
So far so good
Now to my error scenario
It would be possible that the insulation of the live conductor is broken somewhere (L) touches the metal somewhere.. Your test would not tell you!
If you instead disconnected your L to PE link in the fuseboard and used a long wire from the Main Earth bar in the fuseboard and probe against the metal housing of the lamp would be safer instead (because it is possible that you don't even have Continuity of PE but Continuity of L what is lethal)
Perhaps I found an answer myself...
If you have a L-fault you will find out as soon as you toggle a switch... The Continuity would remain even if you toggle a switch
I've tried reading this comment a few times and still have no idea what you're going on about. This test wouldn't highlight a short-circuit fault between line and cpc, it's not suppose to, the insulation resistance test will pick that up. Also nobody in their right mind is going to confirm continuity of cpc by using the wander lead method as the R1+R2 method not only confirm continuity of cpc, it also confirms functional switching and goes some part to confirming polarity.
Alvin Ashman meant a short between live and the metal casing of the lamp
Who disliked this, some people are unbelievable lol
Thanks for the support. Gaz 👍
Thank you for this information. Roof Equipment (eg. AC units ) under come with Exposed Conductive Parts?
I suggest referencing the first video in this sequence as without a wiring diagram im not sure what you are doing. Measuring resistance between line and cpc ?
Hi. Thanks for that... these videos are running along side my classroom lessons for my learners. Point take for the rest of the world more information need... Thanks for watching GSH Electrical
What about structured cabling course. Have you any advice on learning about that online. Thanks Michael