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Can anyone assist with a query?
We are installing a number of Siemens Electric hobs – halogen and the hobs are rated at 6600 watts. There is a wall plate connector fed via a fused spur and this is located within two foot of the appliance.
What size heat resistant round flex must be used.
I’ve been told 4mm but this is proving a nightmare to source.
Would be grateful for any assistance here,Thanks
Timbo
Re:Flex Size
What size does it say to use in the manufacturers installation instructions that come with the hob ?
If it states 4mm then this must be used or go a size up but you may have difficulty getting anything larger in the terminal connection block.
You should be able to get it from electrical wholesalers such as Newey and Eyre etc.
Dave.
Re:Flex Size
Adding to Dave`s post you must use the correct size of cable (or bigger) but there`s no way you can run this hob off a fused spur if it`s drawing 6600 watts!!
It needs hard wired to its own 32amp supply.Re:Flex Size
Timbo wrote:Can anyone assist with a query?
We are installing a number of Siemens Electric hobs – halogen and the hobs are rated at 6600 watts. There is a wall plate connector fed via a fused spur and this is located within two foot of the appliance.Timbo
This hob would need to be protected via its own 30 amp fused circuit along with suitable double pole isolator switch.
Not exactly sure from your post if you are considering connecting these to a 13 amp fused spur but this would be totally unacceptable.Hope this helps.
Bryan
Re:Flex Size
Pat-UK wrote:Does this now come under Part P regulations ?
Nope, only if you change the house wiring on the “other” side of the outlet 😉
Dave.
Re:Flex Size
Dave_Conway wrote:
Nope, only if you change the house wiring on the “other” side of the outlet 😉Dave.
Which if you are going to wire them into the same position as the fused spurs you will have to change the house wiring as the spur wiring will need upgrading from 2.5mm to 6mm twin and earth.
Re:Flex Size
This hob would need to be protected via its own 30 amp fused circuit along with suitable double pole isolator switch.
Not exactly sure from your post if you are considering connecting these to a 13 amp fused spur but this would be totally unacceptable.Hope this helps.
Bryan
Bryan,
It is wired via it’s own 32 amp supply and is one of 47 new build flats we are installing the hobs in.Bazza5000,
Why does it require hard wiring if the distacne to the outlet is at maximum less than a meter? This is also taking into account sufficient length for removal for servicing should it be necessary in the future.Timbo
Re:Flex Size
Hi Timbo,
It requires hard wiring because if you wire it via the fused spur the maximum size of fuse you can put in a fused spur is 13 amp. At 6600watts this hob is going to draw approx. 28amps. It would continually blow the fuse in the spur if the user switched on more than 2 elements at one time.If the spur is wired on its own 32 amp supply then the house wiring should already be 6mm. If this is the case then get the spurs replaced with 45amp double pole switches and then feed a cooker outlet to behind the appliance and wire the hobs into the outlets with 4mm heat resistant cable.
Hope this helps but get back if you need more info
Cheers Bazza
Re:Flex Size
Thanks Bazza.
It’s not a fused spur just a wall connection plate behind the unit on the wall although it has it’s own cooker isolation switch that in turn feeds the plate.
Timbo
Re:Flex Size
Timbo wrote: There is a wall plate connector fed via a fused spur and this is located within two foot of the appliance.
Timbo
I was only going on the info you provided earlier.
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