Earthing and Bonding Part 2 - A SparkyNinja Webinar
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- čas přidán 6. 09. 2024
- This is a recording of a webinar given on 14th April 2020.
This webinar carries on with our discussion on the differences between Earthing and Bonding. We'll ask why Earthing is so important and why it should be maintained if used. We'll also discuss how we determine the need for bonding and supplementary bonding including the situations where installing bonding can actually create further risk.
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Answering the question on why do you get leakage currents. All semi-conductors and modern transistors uttilise quantum tunnelling (the probability for an electron to be outside the the effect of its parent atom) because of this electrons can tunnel from your live circuit parts to your CPC inducing a current which we see as leakage. Over time more and more of these parts are being cramed into electronics causing us this headache.
There are also anti-static systems which use the cpc as a waste pipe.
Thanks guys very interesting presentations, I trained under 16th edition so big changes since then and I’m preparing to take the 18th after taking a long break from being on the tools, so will be hammering your 18th series for which I’m very grateful to you for.
As an aside the gas meter shown on slide 43 was mine 😊
Great content guys, thank you both so much for all these videos 👍👍👍
Thanks lads really helpful 👍 good to see people getting good info out and nott trying to charge for it.
brilliant webinar, thank you for helping with my studies, especially on this this subject which is absolutely mind bending
Fantastic work lads...luving these webinars🙌
In the scenario when you said about the plastic water intake becoming extraneous if the gas pipe intake was metal really only means that the gas pipe itself needs bonding as that’s the pipe that brings in the different potential.if you did that for every pipe you would need to bond every pipe entering the boiler as they would all be classed as extraneous.
Totally agree
Brilliant stuff !
Great video....Question...re; the Plastic water supply pipe,,,changing to copper inside the property....as you mention the copper water pipe then goes to the boiler..where it's connected directly to the Gas supply via the metalwork of the boiler....Isn't it already bonded via the Gas bonding connection (assuming one exists). Also, the same question re; the kitchen island you mention, (with the copper pipe contained in the screed/concrete floor).
Great video.
Thank you
Surely the pipe would be PVC coated as you wouldn't lay the pipe direct in to the concrete?
THANK YOU GUYS
Great webinar once again. One thing I noticed was at approx. 14 minutes, there is a mention of the 100ma supply where the earth is separated at the supply to the hookup point but when the earth is separated directly at the hook up point, there is no 100ma RCD, could you clarify this please. Thanks
just a random question, the earth leakage situation with the computers installed onto the circuit, could you not run a radial circuit with each individual RCD sockets? instead of having an RCD/ RCBO at the Consumer unit. would this not limit the build up of earth leakage on the one device? I understand the installation method plays a part in this.
Thank you 👍
HAPPY 2021 to u all...i find your seminer very interesting...BOND OR NOT TO...my question is...what type of test do we need to carry out...IMPEDENCE or INSULATION...looking forward to your reply...THANKS
why do protective conductors have 10 mAmps. ? 11:20 in video
why is 30/100 milli amp RCD allowed only 0.3 secs when ADS is allowed 0.4 secs ??
Fault protection Vs overcurrent protection. RCD protects the person Vs MCB protects the integrity of the installation.