Understanding Earthing Arrangements - TNCS, TT, TNS

Great video Very well explained

I really love the explanations you gave in the video, I would love to undergo apprenticeship in your noble company. I am Inkoom from Ghana - West African.

Can we change TT system to TN-S?

What is the cable requriement for Earth for TT system as Ze will be high due to soil

In our swamp called 'the Netherlands' TT works best.
Only on some sand grounds here during hot summers some older sub-standard groundrods fail their resistance.

Hi, I have a TT system in my house. I'm putting a 10 sq swa cable to a shed and fitting a separate earth rod at that end for fuse board. How can I protect this cable against fault damage in the ground as the earthwill not be connected off swa at shed. 😊

In Germany, TN-C-S has earthing in every house. Where the lines enters the house.

A portable power bank with 230 volts is an IT system.
No conductor is connected to Earth, so there is no neutral.
There are only two lines with 230 volts. This is safe for one single device.
But it is possible to make a TN-S system out of it, earthing !

Here in Australia we have the ground stake at your house, a water bond and an earth-neutral bond at your home fuse board

Great advise as always thank you 👍. You sound like presenter from Jackanory 😂 😂 😂

A few mistakes in that video…….poor editing. But over all, not a bad try 👍

Australia and NZ are exclusively TT and there's bugger all consideration for where the rod goes. You'd want to be as close to the transformer and as far away from other properties on different phases - alas, no such skill.

Joe, this is a really fantastic video, simple, intelligent and well presented. It also has a huge impact on the type of SPD that is installed so I have shared this with our own apprentice to help him understand. Thank you so much.

Awesome content, regular watcher & subscriber for years. Have you considered doing a video on DC SPD’s ? The regs (or lack thereof) surrounding them & practical applications.

Earthing Arrangements for mobile or transportable units with or with out the uses of a earth electrode?

while good for explaining, i believe the part of the "ground fault making a loop back to the line and going into the protective device" part to be inaccurate. firstly RCD devices operate on the imbalance of the two incoming wires, if your fault sinks current to ground, it doesn't "come back" trough the neutral, thus trips. i really don't know what you're on about with it "going back up into the line", you draw current from the line and sink it to ground, that's what trips a fuse or protective device. any voltages on the neutral line will sink directly into the ground stake at the transformer, not go back up. in that regard TT and TNS/TN-C-S systems perform nearly the same, there isn't any "delay" as it sinks to ground either way, the only benefit i can see is that having a main grounding spike means it's probably much better looked after

an American electrician here, it is so different from what we do in the US we usually Bond the equipment ground in the neutral at first means disconnect and then ground rod placed

If electricity can flow through mass of earth a long way , how would we not feel it and receive a shock from the ground if this happened?

What's happened to this week's eFIXX News? 🤔

what book are you reading sir

Where’s the real Joe?

How can a transformer be on a telegraph pole? Surely you mean an Electricity pole?

In Australia, pretty much all LV installations are TN-C-S AND with a local earth rod connected to the local earth AND the incoming neutral, locally referred to as multiple earthed neutral (MEN, voiced as ‘em-ee-en’). In some areas, the high voltage ‘neutral’ is common with the LV neutral, so common MEN (CMEN).

well the value are not the same so you have to make sure you in the acceptable ZE value 
for reference here is the MAX allow values
TNS 0.8. (Terre neural) separate)
TNCS 0.35. (terre neural combined separate)
TT 200 (terre terre)

by the way second year of existence and you don't know how earth is so important pls go back to college you may save you life and other ppl life

SparkyNinja and co did some really good vids on earthing and bonding. Parts 1 and 2 were each over an hour long, and got watched from start to finish. So, you know, don't feel you have to keep these vids to 6 minutes or that.
More please 🙂


Also, were the colours the right way round on that diagram of the transformer?

Single entendres a speciality. 😀

As a Yank, I’m more “grounded” than you Brits!

When you have a earth rod, next to the home, and supply power to sheaf, workshop, outbuilding etc is it good practice (and allowed) to add earth rods at each remote building?

How about IT (Isolated Terra) systems, which I believe are or were common in places like hospitals?

Grounding