How does BS7671 amendment 1 change the way we install EV chargers?

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Electric vehicle charger installation has been a challenging issue for the IET wiring regulations and codes of practice. No sooner are earth rods the default option to protect against PEN faults on TNCS supplies, then things change.
No sooner was the ink dry on BS7671 -18th edition and amendment 1 came along. The amendment was prompted by innovation within EV chargers (the unicorn device) and the rapidly growing adoption of electric vehicles.
In this video, Gary Hayers is joined by Dr Chris Horne of Myenergi - and the pioneers of the unicorn device within the Zappi EV charger.
00:00 Introduction
00:43 The challenges of earth rods
02:34 Indent (i) BS7671 Amd 1- balanced three-phase supply
03:03 Indent (ii) BS7671 Amd 1 - improve primary earth
03:20 Indent (iii) BS7671 Amd 1Voltage monitoring device on three-phase supplies
04:08 Indent (iv) BS7671 Amd 1 Voltage monitoring on single-phase supplies
04:56 Indent (v) BS7671 Amd 1 Innovations with an equivalent level of safety
06:13 Demonstration of Zappi working to Ident (v)
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Опубликовано:

23 июл 2024

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Комментарии : 24

@GSHElectrical 4 года назад

These 2 are a fantastic double act 👍

@brianwood5220 4 года назад

Well done to Zappy for coming up with this market leading solution.

@westinthewest 3 года назад

I agree. Zappi isthe first-ever EV charger of its kind, and their innovative team has carefully designed features and functions to give you complete control of your electric car charging experience. Just saying.

@eddprice4571 4 года назад

Love the zappy , hate earth rods great job myenergy for making electricians lives easier 👍

@LocoSajoca 4 года назад

Very informative video as usual. I think it is great of the IET to finally recognise and Incorporate into the regulations the innovations being produced that are currently - and are going to be - safe for the end user as well as safe and easy to install for the electrician

@LocoSajoca 4 года назад

Hi guys, I'm not sure how you private message on here so I have messaged you on Instagram 👍🏻

@johnhoward2104 4 года назад

Was reading the new/4th ed of the EVC CoP last week and what a jolly good read it was! It's a great read for any electrician, whether they're interested in EV charging or not, as there's loads of info in there about earth rods that can be applied to using earth rods generally, regardless of EV charging - it's £75 though, so aint cheap but glad I bought it.

@gazdkw82 4 года назад

Brilliant piece of kit. So just to be clear, the zappy will highlight voltage above or below 10%? Also, does the zappy confirm cpc to the C/U or the entire earth fault path including suppliers earth?

@Daniells1982 4 года назад

Nice to see Chris, who is obviously a very intelligent man (a boffin you might say), thinking practically to make the installation electrician's life easier with a realistic solution to quite an inherent issue with EV charging and TNCS earthing systems. Happens far too often where the IET changes regulations with no consideration for the sparks on the ground trying to practically achieve it.

@mrhudson0073 4 года назад

Very informative thankyou.

@RWATraineeElectrician 4 года назад

Great video 👍

@waqasbtm1 3 года назад

i dont know about zappy if i talk about ev charge video this is best video i ever see and understand 5 poitns i just say wounderful and easy expalination video

@efixx 3 года назад

Thanks for the amazing feedback

@MrCrouchback 3 года назад

We used to live in an old late 19th century terraced house. The supply still is a paper insulated armoured cable with a lead sheath covering the cores. The electricity supply company eventually jointed the cable just before the meter... but the paper cable is still in the circuit. My question is could the technology in the Zappi be adapted and retro fitted to the electric supply company side of the incomer to increase the protection of the whole installation...especially in older installations with..."legacy"... issues. Hope someone can respond

@westinthewest 3 года назад

Your description is ambiguous, but as far as I understand, your supply is TN-S so you can export the network earth to your driveway without worrying about PEN faults. John Ward has done a video about how a service that answers the description of TN-S might in reality be TN-C-S under the road outside, but that's another issue altogether. In my experience, and in all the literature I've seen over the years, there is a clear demarcation line which prohibits the connection of your Zappi to the network upstream of the service fuse. I doubt you'd get permission to connect it to the wrong side of the energy provider's meter, but no harm in asking them I suppose.

@nigellewis4686 4 года назад

Will it work on a TT supply

@LocoSajoca 4 года назад

Can i ask, why is the degree of protection for presence of water only IPX4? More and more people are using high pressure jet washers to clean cars and house windows... I would have thought that it would be at least IPX5.

@AWellesley 4 года назад

As a prospective customer I’d feel much safer if Zappy were to explain how their “unicorn” device works. Right now the situation reeks of regulatory capture weakening safety rather than anything actually being improved in the revised rules. If I’ve understood - it is possible for a PEN to be interrupted and for the single phase live wire in a customer premises *not* to go outside the 10% margin that’s supposed to trip the voltage comparison devices. Anything just “as safe” as those isn’t really safe in all circumstances. A separately earthed system, despite the installation difficulties still seems the safest way to go.

@efixx 4 года назад

Hi Bob - We shared your concern last year before the regs changed - So Zappi gave us a unit to see how it works- Check our this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gwmiGf6tChE.html. We explain the various protection features.

@AWellesley 4 года назад

efixx Thanks, looking back through your videos, this one was also useful as a demonstration of the protection in action: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ZedTmlTLH2w.html It’s concerning that the protection will only trip out when there is current on the CPC, rather than as soon as the PEN is interrupted, but still much better than the alternatives if installing a separate earth isn’t practical.

@devlinmaguire8074 3 года назад

So why not make it compulsary for manufacturers to produce systems that comply from day one

@westinthewest 3 года назад

There were no EV's around when the First Edition was published. I think electricity was only about lighting on day one, and since then the IEE have just made it up as they went along, and they still seem to be doing just that.