u/Corporal1j — reddlx

I've bought a used oven + ceramic heating plate combo, and it was wired up for 400V 3 phase [pic.1], but as it had a wiring diagram for regular 230V, I got it. Now that I've wired it up for a regular EU plug [pic.2], when I connect it to a power strip [pic.3] (that has its own over current protection, and is rated for what my wall outlets can handle) it makes the switch for its socket glow slightly while it's OFF (you can see how the switch next to it looks like when it's ON). No other plug does that with those power strips. Should I connect the internal wires from the other two phases to the last one? Is that what the thick black bar on the diagram is explaining?

Don't worry, unless I know it's working, I keep the plug unplugged for now, I only plug it in to test it.