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JPElectric
United Kingdom
Приєднався 25 тра 2019
For anyone training to be an Electrician, or just interested. I've put together some videos that I hope you find useful.
The importance of Main protective bonding on TT systems
Touch voltage can be a lot higher on TT systems than on Tn systems.
Main protective bonding is vet effective on TT systems
Main protective bonding is vet effective on TT systems
Переглядів: 464
Відео
What is the voltage at the fault?
Переглядів 69414 днів тому
What will be the voltage at the fault, and what will be the fault current. In this video I look at touch voltage, voltage factors, and the calculations to work out what magnitude of touch voltage and fault current for installation with and without Main protective bonding I also talk about hoe effective main protective bonding is is limiting touch voltage. Does it have a minimal effect? I'm not ...
Disconnecting protective conductors and false results when testing
Переглядів 74814 днів тому
When testing Ze we need to confirm the earth fault loop impedance. Incorrect disconnection of protective conductors can give us false results.
Flexible cables, what the codes mean
Переглядів 6832 місяці тому
They are so many types of cable. This video looks at 4 very common types of flexible cable.
1 minute refresher for the 18th Edition Part 1 Object
Переглядів 2054 місяці тому
BS 7671 Part1 Chapter 12 Objects and Effects A quick guide to part 1 of BS7671. Please pause and read. May be useful if studying for the 18th Edition. Best on a phone screen, as its small
One minute revision - Part 1 Scope.
Переглядів 1444 місяці тому
A quick guide to part 1 of BS7671. In this video we look at scope. Please pause and read. May be useful if studying for the 18th Edition. Best on a phone screen, as its small
Heating and hot water controls
Переглядів 6015 місяців тому
An overview of controls for heating and hot water. How to wire thermostats and programmers, and upgrading to smart controls such as hive and nest. The actual wiring bits start around 12 minutes in !
LED Tubes, possible electric shock risk from the pins?
Переглядів 4827 місяців тому
Some LED tubes are constructed in such a way that you could get an electric shock, when inserting the tube. This is why you should always switch of power to the fitting when changing tubes.
How to swap out fluorescent tubes for LED tubes
Переглядів 3978 місяців тому
Retro fitting LED tubes into older fluorescent fittings. How they work with magnetic and electronic ballasts. And what happens if installed incorrectly. One thing i forgot to mention in the video is the capacitor in the magnetic ballasts. Capacitors can maintain a charge even when no power is applied to the fitting. So care needs to be taken if removing. The capacitor should be discharged safely.
LED panels. Dimming and Inrush Part 2
Переглядів 2978 місяців тому
I cover push and 1-10 V dimming in this video, and there is a brief intro to DALI
LED Panels, Dimming and inrush current. Part 1 Inrush current
Переглядів 9608 місяців тому
The considerations when replacing Fluorescent lighting with LED lighting. Inrush current, protective device selection and power factor. I have written to most of the major manufactures for data on inrush current, and time. As of yet only one company has replied Links.. www.beama.org.uk/resourceLibrary/beama-guide-to-circuit-breaker-selection-for-led-lighting-.html
Transposition of electrical formula and practical uses
Переглядів 1,1 тис.10 місяців тому
Some basic maths , transposition of formula and BODMAS. There are also some useful practical examples to help electricians with fault finding Thanks to David and Shaun
A cable calculation for a three phase direct on line motor starter
Переглядів 1,2 тис.10 місяців тому
I've re done this video, as I felt bits were missing. If you have already watched it, the new bits start about 7 minute in. Hope it helps
The cable calculation procedure for an EV (Electric vehicle) charger
Переглядів 4 тис.Рік тому
The cable calculation procedure for an EV (Electric vehicle) charger
Diverted neutral Currents - Is our electricity supply safe?
Переглядів 10 тис.Рік тому
Diverted neutral Currents - Is our electricity supply safe?
Installing a PIR sensor to an outside light
Переглядів 21 тис.Рік тому
Installing a PIR sensor to an outside light
Approved Voltage Testers - What are they?
Переглядів 6 тис.Рік тому
Approved Voltage Testers - What are they?
Supplementary Protective Bonding and Touch Voltage
Переглядів 6 тис.2 роки тому
Supplementary Protective Bonding and Touch Voltage
Testing an Extraneous Conductive Part (High or Low)
Переглядів 7 тис.2 роки тому
Testing an Extraneous Conductive Part (High or Low)
How to install cable in lath and plaster
Переглядів 14 тис.2 роки тому
How to install cable in lath and plaster
How to install a socket in lath and plaster.
Переглядів 36 тис.2 роки тому
How to install a socket in lath and plaster.
Insulation Resistance - Part 3 - Dealing with false positives and false negatives.
Переглядів 6 тис.3 роки тому
Insulation Resistance - Part 3 - Dealing with false positives and false negatives.
Insulation Resistance Part 2 - The problem with the neutral conductors
Переглядів 7 тис.3 роки тому
Insulation Resistance Part 2 - The problem with the neutral conductors
Insulation Resistance Part 1 - Why do it?
Переглядів 27 тис.3 роки тому
Insulation Resistance Part 1 - Why do it?
Understanding your test results - Vital knowledge when testing.
Переглядів 3,4 тис.3 роки тому
Understanding your test results - Vital knowledge when testing.
Two way and Intermediate switching - Made simple
Переглядів 1,3 тис.3 роки тому
Two way and Intermediate switching - Made simple
It is a great video and very helpful Can you please tell me how to check the discrimination in your whole system How to know the response time for each protective device How to control the response times as you mentioned that the distribution time is 5 seconds whereas the nearest device is 0.4 seconds Many thanks to you
There is not a link to any other video.
R1 is the resistance of RCD to kettle ? should this not be from transformer to kettle ? or do we ignore resistance from transformer to RCD/ Please clarify
Bro thank you so much the video is very detailed and I really appreciate your work please make more videos
My all time best channel
Hi, @ 3:18 with bonding in place, what would the touch voltage be if the person’s other hand does not touch the tap during an earth fault? Assume person is bare footed and in contact with a bare concrete floor. Thank you.
Always excellently delivered. If you ever marketed your presentations then you could make a small fortune.
Thank you. Your videos are very good. They give a chance to us amateurs to understand complex electrical designs! Keep up the good work.
Thank you for taking the time to create this!
Great videos! Very ell explained!Thanks
Great stuff! Thanks!
Thankyou!
what can i say ? flawless explanation. keep going don't even think about stopping
Thanks once again..... great content
So well explained.
"I love your video, to be honest. I'm just finishing my level 2, but I'm beyond advanced because of your videos."
Great information and delivery, look forward to future videos
This has saved my bacon - perhaps a useful tip: I had difficulty getting a good continuity reading on my wire, possibly because the copper was a bit oxidised (?). In any case, take your time when measuring continuity!
Excellent video, thank you. It's clear you've spent a lot of time preparing such detailed graphics. I was wondering if you might mention something about checking for diverted neutral current on TN-C-S supplies before disconnecting the main earth from the MET, but perhaps you'll deal with that in a separate video. [Edit - and of course, you already have! UA-cam just suggested that video to me]
Thanks again for explaining a complicated (and sometimes not properly understood) subject. Your use of graphics helps a great deal.
Very good....ideal for new/ inexperienced and great reminder for those who need a refresh 😊
Thank you quinsboy7578
Excellent video. Parallel paths in EICRs is not well understood. A couple of really good shorts by "Mainly Electrical" have highlighted this.
Thanks cfgman1, I will have a look at the shorts you suggest
Thank you for this Ze tutorial."Artificial Neutral" @ 4:10 is a new term for me (googled it and got a lot of rocket science. Is their perhaps an easy definition?).Similarly never heard of Earth Marshalling Bar...Everyday’s a school day.Look forward to checking out your new Instagram page👍
Thanks very much freezefoot. Re the artificial neutral, its something I need work on🙂 The earth marshalling bar, is something thats not mentioned much. Its used in guidance note 8 earthing and bonding. Actually they call it a earth marshalling terminal
@@JPElectric Thanks JP👍
great presentation 🙂
Thank you HeathenGeek
Another excellent video, from a chap round the corner from where I live.
Thanks very much jchidley
My favorite channel
Thankyou
I am first here
Many thanks. All the best.
Answers all my questions thank you
Thank you, please it was helpful
So if there is a fault on my central heating system the RCD will trip before electric can travel through my radiators and the MCB will trip once the fault has travelled back through the earth connected to the bottom of my radiator and back to the fuse box. I've just changed my radiator in the bathroom and out of 4-5 plumbers only 1 ask do I have a RCD fuse in my fuse, yes I do, ok you don't need the earth wire connected to your radiator then. And this is because of the reaction time of the RCD to break current.
Thanks for the excellent video. Could you please suggest which brand of box you used / is the best suited to be fitted into a lath and plaster wall. Many thanks again.
Hi Kevin, I don't have a preferred brand really. The important thing is the depth of the box so you you have the depth for the lugs
I cant understand ....in the house it show earth cable connect neutral with the MET? Can you explain for TNCS
Hi. The neutral is at the star point of the transformer. This is 'referenced' to earth. The supply earth is connected to this. They are commoned together on the supply side sometimes, as in a TNCS and separated in the installation. or as in a TNS the earth is ran separately. This is the supply side, we don't do this on the consumer side.
That was excellent as usual Thanks mg.
Thanks very much
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Good clarification . Thank you.
Thank you freezefoot
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Excellent video, amazing tips. Thank you so much for creating this and sharing all your knowledge ❤
very informative and accurate, i dont know why we dont write down the value of ohm we get and where to compare the result to, like u said jst 0.05, as we get bigger sites, these numbers dont calculate, the adibiatic has been done for thermal constraints, but was i an acceptable value of negligible resistance between esposed and extraenous. On paper it says continuity tickbox and verification tickbox, what is an acceptable value still. or does this no become touch voltage problem which designers will never be able to calculate before hand.
great explanation and great work, gives me better understanding now it about main bond calc i will see in ur next vid
without a doubt the best instructional video on Zs testing i've seen, & the rest of the videos JPElectrical are equally as brilliant....thank you for posting these videos!
Thank you Alan that really kind of you to say
Thank you very much you deserve millions views 👍
Thanks very much ghostcatcher7530, I'm a few of that total😀
great explanation thank you!
Thank you nixy1756
Great videos and really well explained.. quick question.. in App 4 6.2, the mV/A/m should be multiplied by the PF of the load or is this already covered by applying the PF for Ib?
Excellent video.. very well explained… thank you!
Thanks vey much simba2860 please you found it useful
how to use the mta in new york
Wow
Thanks for the video. I have to relocate a socket my dad installed 20 years ago. Your video shows me everything I was unsure about and a plan B in case the plaster is in a worse state than I hope it is.
Well explained 👏
Thanks, it’s tricky to find these summaries with all the different standards and codes out there.
Maybe it's just 😮😢❤😂 dim
🎉😅