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.

 

[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??

 

[Amp David]

How you fusing the hob down.

Even after 39 posts we're asking about fusing down. Amazing:cry_smile:

 

[telectrix]

you would only fuse it down if the manufacturers instructions specified a OCPD < 32A, and if they did, i'd query it. if they want to protect the equipment rather than the cable suppluing it, then they should fit their own OCPD.