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One Outlet PE

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Gcsillaz:
Hello everyone!

Recently i've been getting in electronics and decided to buy a osciloscope for my bench.

I live in a 60's apartment and thus my building does not have a PE on the electrical cabinet.

Since my room is in the first floor of the building i was thinking if i could drill a 2,5m hole on earth and install a copper bar. Then i'd route the cable to my wall outlet.
(pic attached)

I know that it isnt the "proper" way, but its going to be pretty hard if i had to exchange all wiring and make a new electrical cabinet to accommodate to proper regulations.

Now i'm using two-prong sockets, i'd exchange for 3 and just connect the earth to the central pin.

What do you guys think? Would this be dangerous? Is it relatively viable?

Sal Ammoniac:
What's a "PE"?

Ian.M:
That would be a TT grounding system which is generally regarded as acceptable if its protected by a RCD (GFCI).  Without one, the ground resistance is often too high to reliably trip the breaker in the event of a Line to PE fault, which makes the whole grounding system a potentially lethal hazard.  Also, if there's any exposed metal pipes or structural metalwork in the room, or it has a concrete floor, faults elsewhere in the building may also cause a significant and hazardous voltage difference between the metalwork or floor, and your new PE, so you may need to cover exposed metalwork and use an electrically insulating floor covering (not just carpet - it doesn't insulate if you spill liquids on it).

I certainly wouldn't modify the wall sockets unless you own your apartment outright or on a lifetime lease and are doing a full rewire to local electrical code under the supervision of a qualified electrician.  The sensible option would be to wire the new PE to a socket strip on your bench, and to fit a RCD (GFCI) in the lead from the wall socket to the socket strip.

Benta:

--- Quote from: Sal Ammoniac on March 23, 2021, 03:47:22 pm ---What's a "PE"?

--- End quote ---

Protective Earth.

BrokenYugo:

--- Quote from: Ian.M on March 23, 2021, 04:02:20 pm ---
I certainly wouldn't modify the wall sockets unless you own your apartment outright or on a lifetime lease and are doing a full rewire to local electrical code under the supervision of a qualified electrician.  The sensible option would be to wire the new PE to a socket strip on your bench, and to fit a RCD (GFCI) in the lead from the wall socket to the socket strip.

--- End quote ---

This is the option I'd take, a GFCI/RCD feeding the bench is a good idea in any event, and you'll need several grounded sockets for any electronics bench anyway.

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