Really helped me through my 2391 52. I have actually started understanding topics that seemed like a foreign language before! Thank you for your clear and thorough explanations. Jason - Electrician
This is another excellent example from Learn Electrics to keep up to date with knowledge sharing. Well done Dave. Definitely one of the best channels for all practicing Electricians and new learners to gain further knowledge or just recap. ⚡⚡⚡
Take a look at this video, 2391 - RING CIRCUIT TESTING , click on the link below ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yPmBpunvoT0.html Thanks for watching, Dave
Micah, its just the resistance of copper and the size of the cable. If you are new, take a look at our other videos, they will give you good knowledge. And visit the website too. Dave.
Peter, treat it the same as 1mm/1mm. In other words multiply by 0.5 for both sides as they are both equal. So 2.5/2.5 use 0.5 factor. 10mm/10mm use 0.5 factor. r1 and r2 will always be the same value in these cases. Hope this helps. Dave.
In absence of known value of Ze, how could we estimate final circuit max permissible length (i.e. r1+r2) as per most of circuit breaker manufacturers published documents
Ahmed, take another look at the video and have a look at this video link about 2391. It should answer your question perfectly. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-FIYPvQk55NA.html And especially this video on resistances. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CjewkvxxHQE.html Don’t forget, you can always go to the website and search for any question that you have. Same as the channel LernElectrics and add dot com . Dave.
