Single phase induction stove push in quick connector difficult to connect

Question

We had to change the current stove we had for and induction one (long story) which I also installed. With this new one, I have a 5 wire single phase setup. I think it is because each stove module where each side must have it own connection, L and N. Since they are connected that way, I can't fit them through the quick push in connectors the electrician left.

I have several ideas, but I want to get input.

1. Should I just cut the sleeving further back? (example in image) and should I take off the terminal because it also a bit thick to fit through the quick connector?
2. Just remove the sleeving and leeve the terminal?
3. Remove sleeving and terminal and add a new terminal? I never did that but should be straightforward.
4. Remove everything and replace the 3-way connection quick connect to a 4-way?

Notes:

• Breakers and everything were prepared for this type of connection.
• Our home connection is monophase, therefore, I'm showing the stove diagram for monphase connection.

Diagram of what I'm trying to explain and the brand connection diagram.

Answer 1

A picture of your actual connectors would help, but my guess, based on how you drew them, is that those are Wago lever-lock type connectors and, to my knowledge, those are NOT rated for more than one wire per lever.

Pick up some 5-position Wagos (check yours for the model number and get the 5-postion of the same model to ensure they're designed for the wire size you've got, those if this is how your electrician did it, you may want to confirm you've got the correct ones to begin with), and put one wire in each position.

Do NOT cut back insulation to make it easier to cram an extra wire in. You do NOT want any bare wire showing between the wire's own insulation and the plastic protective portion of the connector. That's where shorts happen, at best causing the breaker to trip and dinner to be delayed, at worst starting a fire.

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Based on the update with pictures of the actual installation, I fully stand behind my original answer.

It appears that the electrician had run out of 5-hole Wagos (or had to go all the way back to the truck to get some), but had ferrules in his pocket, so he crimped two wires in one ferrule and left it that way for the OP to install.

Noting that not all the wires have ferrules, I would cut the ferrule off the black/brown pair, strip the insulation back, and individually insert each into its own port in a 5-port Wago. NOTE: Check your local laws/electrical code to ensure that it's approved to do this. You may be required to crimp a ferrule on each wire before inserting it into the Wago. If that's the case, that's another error the electrician made.

Once that's done, you can reuse the 3-port Wago that was on the brown wires to connect the 3 separate ground wires instead of trying to cram the 3rd wire into the 2-port Wago.

Answer 2

Your stove is able to accept 3-phase wiring. To distribute the current over two supply lines they specified the shown connection.

What works in my jurisdiction, but not necessarily in yours:

You can now either find an connector that accepts the shown sleeve (cembre z6/3 comes to mind or perhaps wago 221-613) or cut the wires as indicated, remove the insulation and get an 5 post connector.

Since your picture already indicates wago-lever type connectors: The Wago 221-415 should be fine with 5 posts. Please check that the maximum current of the breaker is lower than the specified max. current of the connector (depends on jurisdiction)

And yes, the earth connector should be corrected as @KMJ said.