David Savery Electrical Services's video: Portable Test Rig : Create Evaluate

Playing with electricity is dangerous kids, but if we don’t do it, we won’t learn nuffin! Here then is a video aimed at those who are already well versed with electrical installation and are looking to level up to inspection & testing, perhaps with the City & Guilds 2391 qualification in mind. By building this apparatus, one may plonk it anywhere and play with their chosen test instrument(s) without fear of tripping off the building they’re in. I have two disclaimers however: Firstly, bear in mind I’m no teacher; just a plain ordinary dirty-arse ol’ sparky. There may be errors or omissions in this presentation which is based on the UK wiring regulations, BS7671 18th Edition Amendment 2. The purpose of this rig is merely to show how I myself can build and test to my interpretation of BS7671 based on my ten years’ experience of running an electrical business and my qualifications which include C&G 2394 & 2395 (what is now the 2391). Check the comments, especially any pinned comments, as well as the accompanying website at dses.uk/testrig for updates or errata. I should also add that as a pain ordinary dirty-arse ol’ sparky, I probably won’t have time to field technical questions relating to electrical work outside of the basic construction of this thing. Hell, I don’t even answer my paying customers half the blimmin’ time! Greater men than I, such as SparkyNinja, offer more appropriate (and qualified) avenues for technical discussion such as CPD courses and dedicated Discord channels for your learning betterment. Secondly, as already stated, this is for those who already know their coconuts and can work with such equipment in a safe and competent manner. Those not already juiced in when it comes to safe isolation, GS38 and the requirements for physical electrical installation work should probably keep their tools in their trousers. Personally speaking, I can build and use this equipment without killing myself, but I can’t say the same for anyone else, so if you try it and end up dead, I don’t want some angry widow(er) banging on my door. You know your own skills and limitations, I don't. Treat this apparatus as an unearthed Class 1 appliance! My thanks to Sammi and Ria (aka. TestGear Junkie) up there in that Scotland for requesting this here project, and apologies for it being delayed; planning started late last summer and it was supposed to be out for Christmas. For a parts listing and more information on the whole caboodle, refer to https://dses.uk/testrig Chapters: 00:00 Introduction and disclaimer 07:55 Accessory connection methods 09:51 Base parts 13:45 Runnin’ Wirin’ & accessories 22:01 Start of form filling 25:41 Ring end-to-end testing (r1, rn, r2) 28:53 Ring R1+R2 31:17 R1+RN 33:08 Ring insulation resistance (L-N) [500V initial verification] 34:22 Ring insulation resistance (L/N – E) 36:05 Radial socket R1+R2 37:09 Radial socket insulation resistance (LN – E) [250V periodic inspection on an existing circuit] 39:04 RN+R2 (not in BS7671) 39:25 1000V IR testing on a circuit with a load 40:17 Lighting R1+R2 41:36 Lighting insulation resistance (with fault) 43:27 Zs at DB (Ze) 45:01 PFC 45:58 PSCC 46:31 Zs calculation 47:22 Zs testing (no trip loop) and RCD uplift 51:00 RCD timing testing 54:04 Earth leakage 1:01:16 Current measuring 1:01:42 Capacitance on wiring 1:08:37 Coffee shoutouts! Links: The companion page to this subject on my website: https://dses.uk/testrig GS38 is available as a free download from HSE: https://www.hse.gov.uk/pubns/books/gs38.htm An old video of mine on safe isolation, but still relevant: https://youtu.be/3hbbK2OpshU For the 1.2Ω resistor, here are a couple of sources correct at the time of writing. The part I used wasn’t from either, although they should do the same thing… Amazon: https://amzn.to/3IHRyT8 CPC: https://cpc.farnell.com/tt-electronics-welwyn/mfp1-1r2-ji/resistor-1w-5-1r2/dp/RE05072 SparkyNinja’s YouTube channel: https://www.youtube.com/@SparkyNinja For more on my video content, refer to my OnlyFans page (not really an OnlyFans page): https://dses.co.uk/index.php/news/244-onlyfans Affiliate links: For a shout out in a future video and to keep me and Nigel in our freezing coffee hole, you can buy us a winter warmer here: https://www.buymeacoffee.com/dseselectric My Amazon storefront: https://www.amazon.co.uk/shop/davidsaveryelectricalservices £50 off YourTradeBase: https://go.yourtradebase.com/refer/3M6F3301 SumUp credit/debit card processing: http://r.sumup.com/referrals/oBF5S £10 off your first Huel order when you spend £40 or more: https://huel.mention-me.com/m/ol/nm0sq-david-savery Get £40 credit for switching to Zen Internet: https://zen.mention-me.com/m/ol/rt4lh-david-savery Recycle your scrap cable at greencable.com - use referral code GREENCABLET1ZT when setting up an account and I'll get a tenner while you get a recycling bin delivered at no cost!