Oven connection unit

[Jurghh]

I have a 3400W built in oven that can go to 340C for pizzas. I mention that because maybe it will get close to 3400W under normal use, I don’t know. I’ve installed an MK 45A cooker outlet plate in the wall for the connection. The oven is on a dedicated 20A circuit with 4mm2 THW wire and came with a heat resistant 3x1.5mm2 flex cable which I ferruled the ends of. I was a bit surprised that it wasn’t at least 2.5mm2 but I’m sure the manufacturer knows best. The issue is… the cooker outlet plate only has one terminal each for L, N & E so two wires have to share a terminal. The screw hits down on the 4mm2 first making it difficult to secure the 1.5mm2 however with much effort I managed to make it work. Of course now I’m worried about the connections coming loose in the future. Do you think it would be better to connect the wires using wagos in the back box and put cover over? I wouldn’t ferrule the 1.5mm2 if I use Wagos. 

[Jurghh]

Also, if I go for wagos in a 3x3” box has anyone ever seen a suitable cover? I’ve seen metal covers for the 4x4” boxes. I used one once and drilled a hole, inserted a rubber grommet and fed the wires through. I could do that again but I’ve not seen that size box cover. The existing outlet plate has the added advantage of the clamp protecting the flex wire from movement. 

[Magictoad]

Hire an Electrician. Some Thai ones are excellent and deal with such issues on a daily basis.

The first thing I do when settling into a new country is to find a reliable handyman. I currently have one who is a borderline genius.

[Jurghh]

5 minutes ago, Magictoad said:

Hire an Electrician. Some Thai ones are excellent and deal with such issues on a daily basis.

The first thing I do when settling into a new country is to find a reliable handyman. I currently have one who is a borderline genius.

I’m in Bangkok. If he is too I’d love it if you’d put me in touch with him. I think for this small thing I should be able to do it myself. 

[xtrnuno41]

 

IF you cover an electro box with metal, the plate should be grounded.

Your oven is metal and also should be grounded.

If not have ground, you should at least have RCBO 20 A with 30 mA safety switch.

Change it. As i didnt red it was there.

The connectors are on alieexpress, they have an immense range of these connectors.

 

[Crossy]

On 7/1/2025 at 3:22 PM, Jurghh said:

I have a 3400W built in oven that can go to 340C for pizzas. I mention that because maybe it will get close to 3400W under normal use, I don’t know. I’ve installed an MK 45A cooker outlet plate in the wall for the connection. The oven is on a dedicated 20A circuit with 4mm2 THW wire and came with a heat resistant 3x1.5mm2 flex cable which I ferruled the ends of. I was a bit surprised that it wasn’t at least 2.5mm2 but I’m sure the manufacturer knows best. The issue is… the cooker outlet plate only has one terminal each for L, N & E so two wires have to share a terminal. The screw hits down on the 4mm2 first making it difficult to secure the 1.5mm2 however with much effort I managed to make it work. Of course now I’m worried about the connections coming loose in the future. Do you think it would be better to connect the wires using wagos in the back box and put cover over? I wouldn’t ferrule the 1.5mm2 if I use Wagos. 

 

 

The flex to the oven goes in the two bottom terminal tunnels pointing down and through the strain relief clamp.

 

The supply goes in the centre two of the 4 top terminals.

 

E goes to the two top outside terminals (Supply one side, flex the other).

 

[Jurghh]

On 7/3/2025 at 5:46 PM, xtrnuno41 said:

 

IF you cover an electro box with metal, the plate should be grounded.

Your oven is metal and also should be grounded.

If not have ground, you should at least have RCBO 20 A with 30 mA safety switch.

Change it. As i didnt red it was there.

The connectors are on alieexpress, they have an immense range of these connectors.

 

The oven will be grounded. It's also on a dedicated circuit with a 30mA RCBO. Thanks for your reply. Those connectors look interesting.

[Jurghh]

22 hours ago, Crossy said:

 

 

The flex to the oven goes in the two bottom terminal tunnels pointing down and through the strain relief clamp.

 

The supply goes in the centre two of the 4 top terminals.

 

E goes to the two top outside terminals (Supply one side, flex the other).

 

 

My bad, the photo I uploaded wasn't the correct model. I have the MK K5045 in the photo below. I think i'll make the connection with some Wago 227s for now and replace this cooker outlet with a dual terminal flex outlet when I next visit SG or the UK.

 

[Crossy]

4 hours ago, Jurghh said:

 

My bad, the photo I uploaded wasn't the correct model. I have the MK K5045 in the photo below. I think i'll make the connection with some Wago 227s for now and replace this cooker outlet with a dual terminal flex outlet when I next visit SG or the UK.

 

 

Yeah, those type of terminals work reasonably well when the wire sizes are fairly similar, 4mm² and 1.5mm² (particularly if it's stranded) is certainly marginal.

 

 

 

[Jurghh]

On 7/5/2025 at 4:54 PM, Crossy said:

 

Yeah, those type of terminals work reasonably well when the wire sizes are fairly similar, 4mm² and 1.5mm² (particularly if it's stranded) is certainly marginal.

 

On 7/5/2025 at 4:54 PM, Crossy said:

 

 

Learning every day. Thanks again