Using Aeotec heavy duty switch for ceramic cooktop, how to wire?

Hardware
1

I have a ceramic cooktop connected to a double group in my meterkast (single phase). I can measure the electricity use for almost every device in my home except this one.

Recently, I purchased an Aeotec heavy-duty switch, rated up to 40A, thinking it would be suitable for monitoring the electricity usage of my cooking group.

This is what the group in the meterkast looks like:

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(3th and 4th from the left)

The cooktop is connected using a perilex plug (2x L, 2x N, 1x GND). Before purchasing the switch, I checked the Aeotec website and saw images suggesting it had 2 L connectors:

image

However, upon receiving the switch, I discovered the EU version only has one L connector:

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Now, I’m unsure how to proceed. My initial plan was to use an extra plug and connector to avoid modifying the existing wall plug or the cooktop cord, essentially creating an extension cord with the Aeotec switch in the middle, with these parts:

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Could I simply connect the two L and N wires to the same terminal? Or should I return the switch and look for another solution?

I understand that measuring the power consumption of my cooktop won’t save much money, but I’m curious and want to complete my dashboard.

2

No you can’t. Return that switch and buy something for split phase measurements.
You could consider also clamp meters, if switching is not necessary.

3

Thank you for your response. I’m a bit confused about why the Aeotec switch is rated for 40A when each group can only handle 16A. Does this mean it’s not usable in the Netherlands at all?

Also, I was wondering if I could use two Shelly Plus PM Mini’s for this setup since the cooktop basically functions as two separate devices, each with its own L and N. Do you think that could work?

I’m open to using WiFi, Zigbee, or Z-Wave, so any recommendations you have for measuring the power consumption of my cooktop would be appreciated.

4

I don’t see why it would not work, anyway if switching is not needed Shelly EM would work well without even “touching” the wiring.
I expected you were in US, do you really have split system in Netherlands? I wouldn’t expect… Maybe two phases?
If doubts, post some specs of your cooktop.

Edit:
or maybe two individual lines on same phase to stay within limits of 16A 2.5mm2 wiring

5

It’s just one phase, but 2 individual “groups”, they are somehow combined in the cooktop, this is basically how it is connected:

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But your advice about just getting a shelly EM so I don’t have to touch the wires at all seemed like a good advice, so I got one in today:

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It came with the 50A clamp which seemed more than enough, but unfortunately the clamp is not big enough for my cable:

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Connecting it like this did not deliver a lot of useful reading, I got readings between -10W and 10W.

I’ve now ordered the 150A clamp, hope that works.

6

Clamp has to be completely closed, not even in tension.
120A clamp is bigger. But I would expect that two lines that arrive to your cooktop are just 2.5mm2 wires, they will both fit even in 50A clamp. What the H… is that wire you have in photo? A cable with wires inside?

7

You can’t use CT on a cable, if you have both line and neutral inside, the sum is always zero. You need to have just black and brown wire inside your clamp!