Cooker and hob

[Chrisarm5]

Hi All

I've recently been doing a kitchen re-wire, everything done, sockets added to ring etc. however for the cooker ive wired a 6mm radial to a cooker switch, then 6mm down to a single socket. As cooker is 2.7kw this is acceptable on a 13a plug top....is this correct?
However now the customer has decided to tell me they're getting a separate electric hob, (this is after 2nd fix) and walls plastered. The info I have on the hob requires a 4mm cable supported by a minimum 32a fuse as the hob is 6500w. How can I do this??

Any help appreciated.

 

[Thefailsafe2012]

Prepare to upset your client by telling them it needs a new feed, disturbing all that lovely new plaster!

Had this done to me a couple of times, why do people not make decisions at the right time??!

 

[Chrisarm5]

How do I get a feed to this?

Is it acceptable on the same circuit as the cooker?

 

[EastAnglian]

Easy: Terminate the 6mm cable behind the cooker with a normal (single) cooker outlet and a 13A fused connection unit both mounted in a twin box.

Connect the hob to the cooker outlet, and wire-in the cooker to the 13A FCU

Use the diversity calculation in the on-site guide to prove to yourself that the 6mm cable is in-spec for this load.

Job done.

 

[Thefailsafe2012]

If the oven has a 13a plug on the end of it you could probably get away with plugging that into the kitchen ring circuit. Then you can use your 6mm as your hob supply?

 

[telectrix]

feed the hob in 6mm from the cooker switch. leave oven socket as is or replace with FCU ( your choice ). whatever disturbance to decor is minimal and your customer will have to accept this.

 

[Richard Burns]

Why not just replace the socket you have put in with either a cooker switch with socket or a dual outlet plate and connect in both units.

 

[telectrix]

Why not just replace the socket you have put in with either a cooker switch with socket or a dual outlet plate and connect in both units.

like it. dual outlet box with cooker connection unit one side and a socket of FCU on the other. no disruption then. all below worktop.

will need 13A fuse either in plug top or FCU for the oven.

 

[Octopus]

Clic dual outlet plate, 4 mm to socket mounted next to it. simples

 

[EastAnglian]

Why not just replace the socket you have put in with either a cooker switch with socket or a dual outlet plate and connect in both units.

If you use a dual outlet plate you will still need either a 13A plug & socket or an FCU (FCU is neater).

Why? Because the manufacturer's instructions for the cooker will say that the device must be fused at 13A. Failing to follow this instruction would be a deviation from BS7671 and is also likely to invalidate the warranty.

 

[Geordie Spark]

Prepare to upset your client by telling them it needs a new feed, disturbing all that lovely new plaster!

Had this done to me a couple of times, why do people not make decisions at the right time??!

Tell me about it!!

I've been helping my builder mate out with his house renovation and very early on I asked what he was going to use for cooking. He told ma an electric oven underneath a gas hob, so I supplied a gas supply and a 2.5 radial for the oven.

Next thing I knew a bloody great all-electric range cooker appeared .................... :banghead:

 

[tidyboiler]

I've been helping my builder mate

Is the village aware that their idiot has escaped again? :bucktooth:

 

[Geordie Spark]

Is the village aware that their idiot has escaped again? :bucktooth:

THIS village has three idiots - Davey, his son and a certain ex-footballer with a drink problem who has been in the news recently,

 

[tidyboiler]

THIS village has three idiots - Davey, his son and a certain ex-footballer with a drink problem who has been in the news recently,

4.... don't forget the Mockney. :17:

 

[Geordie Spark]

4.... don't forget the Mockney. :17:

I already had ........ it was ever so easy.

 

[Anthony King]

So geordie is from dunston area?

 

[Geordie Spark]

So geordie is from dunston area?

He is.

 

[telectrix]

didn't realise there was a prison at dunston.

 

[Geordie Spark]

didn't realise there was a prison at dunston.

There isn't .... but Dunston did at one time have an asylum.

I believe it may have been the place where my Mother met my Father.

 

[GLENNSPARK]

Prepare to upset your client by telling them it needs a new feed, disturbing all that lovely new plaster!

Had this done to me a couple of times, why do people not make decisions at the right time??!

mate....you need to think a little before posting this kind of thing...
as has been said already here...diversity...
someone may take this as gospel...and make work for nowt....and possibly lose further custom through it....

 

[Anthony King]

He is.

Im from ryton, not far away

 

[Amp David]

One reason why on almost every kitchen rewire, i fit a twin 1 gang back box. 1 side can be used for a cooker connection plate and the other a single socket or FCU. Covers all outcomes then.

Rewiring the circuit, are you on drugs or what

 

[Engineer54]

like it. dual outlet box with cooker connection unit one side and a socket of FCU on the other. no disruption then. all below worktop.

will need 13A fuse either in plug top or FCU for the oven.

Don't need all that, just one of these and the job's Done!!


Click 45a Easyfit Dual Appliance Cooker Outlet Plate

 

[simpson93]

Surly you would be alright on a 32 after applying diversity -10 amps then -30% depends on the client tho that's just a general guide

 

[Engineer54]

Surly you would be alright on a 32 after applying diversity -10 amps then -30% depends on the client tho that's just a general guide

For the Umpteenth time, A cooker (be it a combined all in one appliance or oven and hob set-up) up to 15 KW is perfectly good on 6mm cable with a 32A MCB/RCBO OCPD (or pre metric, ...7/044/30A OCPD)!! And has been for well over 60 odd years !!

 

[tony mc]

Don't need all that, just one of these and the job's Done!!


Click 45a Easyfit Dual Appliance Cooker Outlet Plate

Just fitted one of these last week and must say they are good and sturdy and easy to fit!

 

[irn-brue]

doing kitchen upgrade oven was already wired in 10mm all ok new oven and micro oven wired off switch giving me 6100watt with out diversty problem being oven and micro oven pre wired in 1.5 flex. flex cannot be replaced will this be compliant on a 32amp mcb as it was wired when i came to fit two seprate loads from one cooker switch one to micro oven one to main oven would this be ok as it would only be pulling load of the micro oven through that flex and not pulling the load off oven not pulinng the load off both through flex if both on. flex lenght less than three meters. will be nite mare to run new circuit for micro oven i know two oven meant to be on two switches everything plastered and painted.

 

[Geordie Spark]

Im from ryton, not far away

I almost bought a house there from a mate I once had.

 

[telectrix]

doing kitchen upgrade oven was already wired in 10mm all ok new oven and micro oven wired off switch giving me 6100watt with out diversty problem being oven and micro oven pre wired in 1.5 flex. flex cannot be replaced will this be compliant on a 32amp mcb as it was wired when i came to fit two seprate loads from one cooker switch one to micro oven one to main oven would this be ok as it would only be pulling load of the micro oven through that flex and not pulling the load off oven not pulinng the load off both through flex if both on. flex lenght less than three meters. will be nite mare to run new circuit for micro oven i know two oven meant to be on two switches everything plastered and painted.

casn you fit 2 x 13A FCUs for the 2 flexed appliances?

 

[irn-brue]

was thinking about that but but one oven is 3500 watt which would give over 13 amp and micro oven states that 15 amp supply required trying to make best out off bad situation may go with 13amp fcus but dont want them to blow behind cookers once in place i dont know why the manufacturers dont up rate the flex to suit power demand because it pretty much on the limit was going to just up rate the flex as this cant be done may have to fit fcu or lower the mcb to 20 amps which could cause to trip even after diversty is applied but this mite be better than fuses blowing behind aplliances

 

[telectrix]

3500w is 15.21A @230V, or 14.58A @ 240V. either way, a 13A fuse should not blow at this load, and that's without applying any diversity, or allowing for the manufacturers claims of wattage may be optimistic.

 

[Octopus]

was thinking about that but but one oven is 3500 watt which would give over 13 amp and micro oven states that 15 amp supply required trying to make best out off bad situation may go with 13amp fcus but dont want them to blow behind cookers once in place i dont know why the manufacturers dont up rate the flex to suit power demand because it pretty much on the limit was going to just up rate the flex as this cant be done may have to fit fcu or lower the mcb to 20 amps which could cause to trip even after diversty is applied but this mite be better than fuses blowing behind aplliances

What do the manufacturers installation instructions say?

 

[irn-brue]

manufacturers instructions state that each oven needs a supply of its own at 15amps or above but as this is allready wired in and didnt know about oven specifications they want me to connect both just looking for a solution to this problem that doesnt require putting a new feed in ,you can have a hob and oven of same switch but two ovens of similar wattage in same wall unit meant to be on different switches apparently kind of like double oven one oven on top of the other running another feed not really practical.

 

[trev]

He is.

The posh end up the hill or the slightly rougher end Ross Ave, Lister Ave and those blocks of flats?

 

[telectrix]

manufacturers instructions state that each oven needs a supply of its own at 15amps or above but as this is allready wired in and didnt know about oven specifications they want me to connect both just looking for a solution to this problem that doesnt require putting a new feed in ,you can have a hob and oven of same switch but two ovens of similar wattage in same wall unit meant to be on different switches apparently kind of like double oven one oven on top of the other running another feed not really practical.

if you have a 6mm feed on a 32A breaker, then fit each with a 20A D/P switch. they are classed as fixed loads, so the 32A will provide short circuit protection. overload is considered to be unlikely on a fixed load. 433.3.1 (ii)

 

[Anthony King]

I almost bought a house there from a mate I once had.

Well i would say u made the right decision, small world anyway

 

[Flanders]

if you have a 6mm feed on a 32A breaker, then fit each with a 20A D/P switch. they are classed as fixed loads, so the 32A will provide short circuit protection. overload is considered to be unlikely on a fixed load. 433.3.1 (ii)

How would link the two 20 amp switches if you have a 6mm feed in the first switch

 

[telectrix]

x 2

 

[Megavolt]

Don't need all that, just one of these and the job's Done!!


Click 45a Easyfit Dual Appliance Cooker Outlet Plate

How you fusing the hob down.

 

[Engineer54]

How you fusing the hob down.

Errrr, why would i need to fuse the hob down??