ᐅ Does a conductive vapor barrier (aluminum) need to be grounded?

Hello,

we have a vapor retarder called Delta Reflex Plus, which has an aluminum intermediate layer. According to the manufacturer's information, this layer should shield 99% of electromagnetic radiation. As a complete layperson, this sounds to me like aluminum is conductive, and therefore there should never be any current reaching the vapor barrier, for example during roofing work using screws and a drill or when installing lighting/home technology.

Does anyone know about this?

No, you don’t need to ground it. The equipotential bonding is already established by the lamp itself, provided it is connected according to regulations.

Thank you for the response. But what if I want to install the lamp first and use a drill with screws (conductive) to penetrate the conductive coating—would I then not be grounded?

I might be completely missing something here. However, aluminum conducts electricity just as well as copper. If I drill through a live aluminum surface with a metal screw or accidentally come into direct contact with the aluminum surface using a metal object, wouldn’t the current pass to me without being able to flow away through an equipotential bonding connection? Or am I mistaken?

Why does this happen? You can’t make calls inside the house, and when the phone is on, it emits signals like it’s overheating...

Fragenasker schrieb:

I wouldn’t be grounded then.

But it is grounded through the screw, and why would the membrane carry current if it’s not connected anywhere? Ideally, you shouldn’t drill into the membrane at all.

Fragenasker schrieb:

And if I drill through a live aluminum surface with a metal screw or somehow come into direct contact with the aluminum surface using a metal object in an unfortunate way, wouldn’t the current flow through me since it cannot discharge via an equipotential bonding?

Mycraft schrieb:

The equipotential bonding is provided by the lamp itself, as long as it is connected properly according to regulations.

Then you simply become the lamp – just not connected properly *SCNR*

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