Networking and Lightning

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Keigo

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Since the beginning of the year, my telkom line got strike by lightning 3 times in 2 month and took out many devices on in the network. So I came up with this solution below, so it only kills the modem when it hits again.

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However, there is downside with it such as..
- latency when online gaming and browsing
- can't use bridge mode

So I want to see anyone have a better idea can share. Thank you. :)
 
The wired version of this would be Fiber. Glass also does not conduct electricity or static pulse.
 
You could install one of those lightning rods so it doesnt touch the telkom cables.
 
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Rickster said:
You could ask the to install one of those lightning rods so it doesnt touch the telkom cables.
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The router failure isn't actually from lightning striking the telkom cables. Due to the high voltages and amps from the bolt arching, a strong magnetic field induces potential in all conductive material in a wide area. sometimes the protection is sufficient to absorb the high voltage. We can not contain or insulate a lightning strike. it burns thru everything. I have seen buildings with holes thru walls where lightning strikes occurred.
 
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Magnum said:
The router failure isn't actually from lightning striking the telkom cables. Due to the high voltages and amps from the bolt arching, a strong magnetic field induces potential in all conductive material in a wide area. sometimes the protection is sufficient to absorb the high voltage. We can not contain or insulate a lightning strike. it burns thru everything. I have seen building with holes thru walls where lightning strikes occurred.
Click to expand...

Earthing dude, it will solve the problem.
 
Rickster said:
Earthing dude, it will solve the problem.
Click to expand...

Earthing does not solve the problem.Please read carefuly what I said. When lightning strikes static electricity flows. With that flow current is drawn according to the resistance over the distance the lightning bolt has arched. this flow of current causes magnetic flux. When Flux crosses a conductor an EMF is induced in that conductor. Conductor being any metallic object , power cable, lan cable, telkom cable, TV Arial, even satelite dish.
 
Considered trying Homeplug units if latency is a worry?
 
Magnum said:
Earthing does not solve the problem.Please read carefuly what I said. When lightning strikes static electricity flows. With that flow current is drawn according to the resistance over the distance the lightning bolt has arched. this flow of current causes magnetic flux. When Flux crosses a conductor an EMF is induced in that conductor. Conductor being any metallic object , power cable, lan cable, telkom cable, TV Arial, even satelite dish.
Click to expand...

I know exactly what you are on about, you are basically describing a Tesla Coil, our routers have also been hit a few times. And each time it has hit the physical pole.


I dont believe that EMF can go through double insulated twisted pair and still have enough current to blow a router.
 
Make a few knots in the phone line lightning cant go around corners




:)
 
Rickster said:
I know exactly what you are on about, you are basically describing a Tesla Coil, our routers have also been hit a few times. And each time it has hit the physical pole.


I dont believe that EMF can go through double insulated twisted pair and still have enough current to blow a router.
Click to expand...

A twisted pair is not immune to lightning. It is better suited as noise protection because both wires will be exposed to the same noise and the noise can therefore be cancelled out.

The inducted current will be induced on both wires at the same time and will be sufficient to damage the components.
 
Rickster said:
I know exactly what you are on about, you are basically describing a Tesla Coil, our routers have also been hit a few times. And each time it has hit the physical pole.


I dont believe that EMF can go through double insulated twisted pair and still have enough current to blow a router.
Click to expand...

Ive seen induction voltage high enough to melt away an Armored cable in wet soil next to tree that was struck by lightning. Lightning bolts can have potential in upwards of millions of volts. If it strikes close enough to a conductor it will blow even melt most electrical equipment. Telkom doesnt run twisted pair everywhere. I have about 30 meters of twin cord still suppliying my ADSL.

Best bet to protect network will be to get cheap ADSLl router, link that with fiber converter. In any case you might need to replace router and fiber converter. but from the patch lead onwards should be safe.
 
Install a RJ11 surge protector between the wall socket and the ADSL modem, and a RJ45 surge protector between the ADSL modem and the rest of the network. Avoid long cable runs as this will increase the induced effect.
 
Wyzak said:
A twisted pair is not immune to lightning. It is better suited as noise protection because both wires will be exposed to the same noise and the noise can therefore be cancelled out.

The inducted current will be induced on both wires at the same time and will be sufficient to damage the components.
Click to expand...

What he is saying is that the wire is supposedly not being struck by lightning, but the EMF around the lightning strike goes through the wires some how, like so.

f66fb76d79.png
 
Rickster said:
What he is saying is that the wire is supposedly not being struck by lightning, but the EMF around the lightning strike goes through the wires some how, like so.

f66fb76d79.png
Click to expand...

Yeah, that does happen. That is called induced current, or induced surge. That's why you need to have the surge protectors scattered through the network to absorb and limit the damage. That's also why I said avoid long cable runs, as the longer cable will induce more current.
 
Beachless said:
Make a few knots in the phone line lightning cant go around corners




:)
Click to expand...

Lol. every time some un educated laborer drove over out extensions we switched off the grinder, drill, welding machine citing they cut of the power and now we will have to turn it on again. They always say sorry baas...
 
How much latency does 10cm wireless add?
 
Dolby said:
How much latency does 10cm wireless add?
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WIFI isn't full duplex. I wanted to convert all my lan cables to Gigabit WIFI, after some research I decided against it.messy cables everywhere will have to do until I can find a wall socket with an additional RJ connector for the gigabit LAN cable.
 
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