Restaurant wet cooker wiring

[martom]

Hi, I need some advice - I came across a customer who wants me to supply power to a wet cooker in a restaurant.
this "thing" has 3 burners and each burner is separate connected through 13A plug - factory fitted.
However each burner is 2.99 kW, so actually it's absolutely fine to use it on a 13A plug, but I'm looking for ideas how to supply it from fuse box as together it's still just under 9kw
because this is a restaurant - I'm afraid no diversity can be taken into calculation?
its ca 16 meters (cable length) from CU

do I really need to run 10mm cable to supply 3x single 13 A sockets / on 40A mcb?
sounds strange to me, but have no another idea now - so any advice appreciated
thanks
tom

 

[ian.settle1]

What is a wet cooker when it is at home?

 

[ruston]

What is a wet cooker when it is at home?

It's either a bain marie or a high pressure steamer.

 

[snowhead]

3 x 2.5 cables?

 

[martom]

It looks like this, just electric - not gas

 

[martom]

3 x 2.5 cables?

Yeah, but I don't really want to have 3 different fuses on one appliance?? Or I'd doesn't matter in this case?

 

[Marvo]

Doesn't each appliance require a single point of isolation under the UK regs?

 

[martom]

Doesn't each appliance require a single point of isolation under the UK regs?

This is what I mean. But from other side - I can see it as a table with 3 separate burners fitted into it?
As this unit is already factory fitted with 3 x 13A plugs, it may be right to run it on 3 x 16A mcb?

 

[Richard Burns]

6mm² 40A radial socket circuit, using sockets that can take 2 x 6mm² cable (I think MK and Crabtree are OK). method C. Plug in using the supplied plugs.

But running each socket from the same 40A breaker with individual 2.5mm² cables would be easier. The load is limited by the plug top 13A.

 

[martom]

Thanks Richard, I haven't think about the limitation caused by 13A plug

its always worth to ask on the forum - thanks everybody - my problem has been solved

 

[telectrix]

personally, i'd run 3 2.5mm cables, fed via a 3 phase 20A MCB , (input side commoned up) so that all 3 would isolate simultaneously for maintenance, then after a couple of weeks, when the plugs have welded themselves into the sockets, hard wire each into a 20A D/P switch. using this method. all 3 can be isolated by the MCB, or individually by the 20A switches.

 

[Guest55]

40 mcb >>> 6mm cable >>> 40A IP rotary isolator next to cooker >>> 3 sockets. below , preferably IP rated.

;-)

 

[telectrix]

whichever way you go, i'd ditch the plug/socket arrangement. lost count of the number of welded/melted plugs i've come across when drawing this level of load. once you get a bit of contact resistance it spirals up into heat, increased resistance... more heat....

 

[ruston]

whichever way you go, i'd ditch the plug/socket arrangement. lost count of the number of welded/melted plugs i've come across when drawing this level of load. once you get a bit of contact resistance it spirals up into heat, increased resistance... more heat....

That is good advice bearing in mind the length of time they will be operating .