[cbr]

They're describing a power strip that has a 2-prong wall connector and offers three 3-prong outlets. This is dangerous, because equipment with 3-prong plugs needs to be grounded, and this power strip misleads you into thinking you've done that.

[didibus]

I rent an old apartment in the US, and no law requires the landlord to ground the wiring, so I actually need a power strip like that so that I can plug the strip into the wall and also plug 3 pronged electronics to it.

I know that it offers no grounding, that's a risk I have no choice but to take on my equipment because my building is not grounded. So I'm not sure someone selling a strip like that would be fined if my landlord isn't even forced to ground the building.

[cbr]

In that situation there are three safe and legal answers:

* Replace the wiring with grounded cable. Expensive.

* Replace the outlet with a GFCI and label it "no equipment ground". Gives most of the safety benefits of a proper ground, and is up to code. Not that expensive.

* Use a cheater plug [1] and connect the external ground tab to a pipe or something else grounded.

What you're asking for is basically a cheater plug plus an ordinary power strip, sold as one integrated unit. Better to keep them separate so that people know what they're dealing with. Also, what the poster upthread was describing didn't have a grounding tab, so there was no way to hook it up safely.

(The landlord isn't required to set up grounded outlets out of a general principle that you only need to bring things up to code when you're modifying it, and that something that was legal at the time it was installed stays so. Your unit could legally have knob-and-tube wiring if it's old enough!)

[1] https://en.wikipedia.org/wiki/Cheater_plug

[chx]

You can use cheater plugs to connect the third wire to piping. That should be safe. I am not your electrician, however, just a random stranger.