Just saw this video on youtube where one person had some problems with lightning and ethernet cables https://www.youtube.com/watch?v=Ev0PL892zSE&feature=youtu.be&t=357 Solution in the end was to switch to fiber. I was wondering if RBGESP would have helped in that case? He mentions he did use a similar device after one accident, but there were some problems the second time.
Should I just get RBFTC11 and use fiber?
I was wondering if RBGESP would have helped in that case?
Maybe yes, maybe no… It depends on the case i guess… If the electrostatic discharge (ESD/EMP protection ) was within its limits of protecion yes…
Also Mikrotik suggests to use RBGESP one on each side of the device we protect…
The problem with surge supressors (and I don’t think RBGESP is any different) is that it needs good grounding and (even more importantly) the device it is protecting needs to be grounded to the same point. But even if installation is made properly, they have limits of how much energy can they “flush” to the ground. If the induced surge has higher energy (or in case of direct lightning strike), then the built-in gas discharge tubes can’t deal with all of it and some energy will hit the protected device.
If one uses a stretch of fibre (e.g. RBFTC11), then none of the above applies. Indirect lightning strikes won’t do any harm (no conductive wire to induce electricity) and in case of direct lightning strike only one end of connection gets dammaged.
Edit: I just watched the video … so essentially it was a direct lightning strike and judging from the extent of dammage I’d say the energy exceeded what ordinary surge supressors can handle. On the other hand, if fibre cable was used instead, the only damage would be done to the tree.