Original subtitles

Today, I'll demonstrate how to design the earthing system according to IEC 62305 part

3.

Let's start with a type A earth electrode arrangement with planned outer lightning protection

system.

As a first step, I assign my earthing system by selecting the floor slab, clicking right

and selecting assign earthing system.

Then I move to the earthing settings.

I choose the earthing system according to IEC 62305, check the value for the specific

earth resistance in ohmmeter and select if we want to work with type A or type B earthing

electrodes.

Then I choose between vertical and horizontal earthing electrodes.

The used material is fine, so I click on apply to start the calculation of the earthing system.

We see that the program automatically placed an equipotential bonding conductor for connecting

the earth rods.

The earth rods are not automatically placed at this point because we plan with an outer

lightning protection system where the earth rods are placed per down conductor once they

are added.

To demonstrate that, I quickly change to a second window where I already prepared a building

with lightning protection rods.

If I select this rod, click right and select add down conductor cable, the system automatically

sets an earth rod and makes a connection to the functional equipotential bonding conductor.

The earth length calculation shows if the placed earth rods are sufficient or if additional

measures need to be taken.

I can display the calculation result by selecting the floor slab, clicking right and choosing

earth length calculation result.

The norm instructs to install at least two earthing electrodes, so we have to install

an additional earth rod.

I can simply add another earth rod by selecting the tab lightning protection and choosing

add earth rod.

Now I can choose the point of installation.

In general, the length of the earth rod is automatically calculated through the earth

length calculation.

If you choose to deactivate the earth length calculation, the program automatically jumps

to the recommended earth length of 9 meter.

Planning the earthing system with straight surface earth electrodes works in a similar

way.

To demonstrate that, I remove our lightning protection system by clicking on lightning

protection and then remove lightning protection system and start to plan again with the same

settings.

Except this time I choose the horizontal earthing electrodes and click on apply.

Again the equipotential bonding conductor is placed and I can add earth electrodes either

per down conductor or manually as before.

As the last point of this tutorial, I'd like to make an example with a ring earth electrode.

And first we remove the lightning protection system again.

Then we open the earthing settings.

And if I now choose type B earthing electrodes, I can select if I additionally want to work

with vertical or horizontal earthing electrodes if additional earthing electrodes are required

due to the size of the floor slab being too small.

However, I receive a note from the program if this should be necessary.

When type B earthing is active, I can choose in the options tab to activate or deactivate

the mesh.

When planning in accordance with IEC 62305, a minimum vertical distance of 0.5 meter is

required.

Once I choose apply, I see the outcome in our drawing.

That's it for today.

Thanks for watching.