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Discuss Wiring up an induction hob - wanted to sense check if what I'm doing is correct in the DIY Electrical Forum area at ElectriciansForums.net

Cupa

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DIY
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Hi guys,

I have a new induction hob which I'd like to wire in. I have already wired in the oven and grill into the kitchen using a length of 4mm 3 core heat resistant flex and that is working fine.

Back of the hob shows the following diagram:



Based on the above schematic, I plan to wire in as follows:



On the assumption my connections in the image above are ok, next question is do I strip the wires free of these connectors which came with the hob?!



...and wire them in like this, by wrapping each core around the screw and then screwing tight (this is a pic of the way I installed the oven and grill with the 4mm heat proof flex cable)



Thanks in advance!
 
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Cupa

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DIY
  • Thread Starter Thread Starter
  • #2
Oh and I forgot to add - the hob, like the oven and grill, have their own respective supply back to the fuse board, each on a 32a breaker. The oven and grill is rated at 5.9kW, the induction hob is a bit more at 7.4kW.
 

Wilko

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Arms
Esteemed
Hi - the flex they've supplied has crimped on ferrules which are helpful. Don't cut them off :) . Where will you be connecting it? Pic?
 

littlespark

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Arms
Esteemed
Advent Win
They've made your life easy by stripping the flex and crimping ferrules on the end. They should be used.

However, if the connection box hasn't got enough room for the cable, then that's bad design by the oven manufacturer
 

Cupa

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DIY
  • Thread Starter Thread Starter
  • #6
Hi - the flex they've supplied has crimped on ferrules which are helpful. Don't cut them off :) . Where will you be connecting it? Pic?
Morning Wilko, I'll be connecting it to the cooker plate, which was fitted about a year ago by a qualified sparkie. I believe it is 45a.



They've made your life easy by stripping the flex and crimping ferrules on the end. They should be used.
Ok, I'll have a fiddle and see how they can be secured correctly.

Why the two different termination (pics)?
Sorry for the confusion - the cable that came with the induction hob, is 5 core and has ferrules already on each end.

The oven, which I already installed, didn't come with any cable at all, so I looked at the specs and went and bought 4mm 3 core heatproof flex, which I secured as in that pic above by stripping each core and wrapping it around each bolt before fastening it up and checking it was secure by giving it a good yank.

I was using that as an example of fitting - if I can't use the 5 core with ferrules on the induction hob, I was asking if I can strip them off and attach them in the manner as when I installed the oven.
 

Wilko

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Arms
Esteemed
Keep the ferrules and connect all the conductors through to the cooker connection unit :) .
 

Cupa

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DIY
  • Thread Starter Thread Starter
  • #8
Keep the ferrules and connect all the conductors through to the cooker connection unit :) .
Fine I'll resist the urge to lop them off. :D

Did I read the schematic correctly in terms of hooking it up (my photos in the initial post)???
 

telectrix

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Mentor
Arms
Esteemed
on single phase you don't require the black and grey. blue to 4, brown to 3. link 2-3.
 

Cupa

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DIY
  • Thread Starter Thread Starter
  • #11
on single phase you don't require the black and grey. blue to 4, brown to 3. link 2-3.
With this being a domestic single phase / 230V installation, you're suggesting I just wire in the live, neutral and earth to the hob and the same at the cooker outlet plate end and just forget about the other cables / not wire them in anywhere?

I'm a bit confused because the hob is rated at 7.4kW. I am surprised such a piddly small / thin cable is capable of running the hob at its theoretical full output. This is the cable that was supplied by Bosch and it is a lot thinner than the 4mm heat proof flex 3 core I used to install the oven and grill combo with.
 

Midwest

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Arms
Esteemed
I'd tend to follow the manufacturers instructions if using their supplied final connection lead. Do you have a model number and or instruction manual we can peruse?
 

UNG

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Mentor
Arms
So using the supplied 5 core flex to the cooker plate connect

2 - brown & 3 - black to the live
4 - grey & 5 - blue to the neutral
and green/yellow to earth
 

telectrix

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Mentor
Arms
Esteemed
Hi - not to disagree, but I think the supplied lead may not have ccc if all conductors are not used as per the wiring diagram.
so they've supplied a cable meant for 2 phase to a customer with a single phase supply?????
 
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