How electrical distribution systems TN TT IT protect against indirect contacts. Grounding systems.

In this video I want to tell you step by step how the different electrical distribution systems TN-C, TN-S, TN-C-S, TT and IT protect against indirect contacts. I will also talk about the grounding of both the transformation center and the masses of the loads as well as the type of protections used in each system.

[asiaintermat]

Very useful!!!
My country changed few years ago country code to Europion code .
And also Protection Code changed to same as European Code

[andersonpinesso]

Thank you very much for perfect explanation...very good job

[Ignisan_]

In the country I live in we use TN-C-S for most applications, TN-S and IT in a few niche applications.

[spelunkerd]

In a TT system I believe the whole house RCD is upstream of the breakers. As discussed below, for safety there is never any breaker or switch to interrupt neutral lines. Also I believe the TCN-S system is so labeled simply because the feeder wires to the home combine N and PE together, not because there is a mix of downstream components that are fed with either separate or combined neutral. As a rule of thumb the bonding of neutral and PE (in TCN-S) happens at only one point between the service input and the main house beaker, and there are never any devices on the other side of that bond. You might consider doing this again, it is a useful resource. You might also bridge into how a broken neutral can change the neutral and ground voltage level throughout the home, causing some devices to experience higher than average voltage drop because of imbalanced consumption between the two lines of a split phase 120V TCN-S system.

[abdullahalahmadi]

Thank you very much. I have TN C-S system in my building, and a 3-phase lift motor with control panle in the sixth floor is connected properly to the system as you described and there is encased electrode that is conected to the building structure and to foundation sticking out in the elevator room can I used as earthing for further protection and ground the control panle and the elevator motor to it.

[BjornV]

Good video, but the animated person is distracting and doesn't add a extra value to the video.

[NihilisticAngel]

are there any reading materials that you recommend? I would like to read up more on this topic.

[Zuwwar]

Why it is not recommended to distribute neutral in IT earthing system?

[ZopcsakFeri]

"My name is Robert" - says the robot :D I see what you did there...

[ciechvt]

In the IT system fault why the touch voltage is not as the same voltage of the supply?.

[JonasKianzad-znoi]

Why do you spend time animating this person standing there, which are just flexing. Instead of animating this electrical system much better?

[ahmedrefaat]

at TNC CONNECTION, YOU put on the diagram a Circuit beaker on the PEN which goes to the load, which is wrong, as it is prohibited to break the PEN, Because this will isolate the earth to the loads, which is dangerous !!!!

[ThanhNguyen-whih]

the sound is not good I am quite disappointed

[ShomiTheGreat]

It hurts listening to the AI voice. Anything's better than AI.