Yet another griunding question. Are ground loops to be avoided?

[Luk88]

I have the following situation (only one phase shown for simplicity).

On the left is the house and its utility grid (yes I get a PE cable from the utility around here). The grounding in the house is done normally (bonded to neutral in the main panel only).

Said PE conductor or EGC (US version) goes to the other building along grid supply there. There is no bonding to neutral in the other building as per the usual rules. All this is clear to me.

However I have inverter power coming from that other building(L2 N2) and one of the conductors in that cable is PE/EGC and now I wonder... If I connect it to the house's PE this will form a ground loop... (Question mark shown on the drawing).

Is this a problem? Should I leave it disconnected? I'm connecting it for now, but I'm eagerly awaiting any responses to this thread

 

[DIYrich]

Avoid if you have sensitive electronics.

Ground loops

help.campbellsci.com

 

[Luk88]

Avoid if you have sensitive electronics.

Ground loops

help.campbellsci.com

It is not obvious that this applies to electricity supply.

Such ground loops are usually considered in case of signal wires (analog audio etc). This article talls about it in this context. They even use symbols of operational amplilifiers on their diagrams.

I'm not worried about emi noise on my ground(all sensitive equipment i have has sufgiecient filtering). But if this was going to "pick up" a lightning surge and make it 10x of what it otherwise would be... I wouodn't want that.

So that why I'm asking. Those of you that do multi-building electric installs, how do you resolve this?