induction hob

[amckay]

A friend has just text me and asked if he can put an induction hob (beko hic64402 t) on a plug. I've just downloaded the user manual and it states to use cable type h05rrf 3g 2.5.
I've just googled that and it came up as Chinese manufacturers/sellers.
Never fitted or worked with hobs before so just wondered what you good people thought.
My first thoughts were 4mm t+e but it may appear I can get away with 2.5mm
But surely it can't go on a plug?

 

[trev]

Unlikely but your answer will lie on the rating plate.

 

[amckay]

It just says 6.7kw
No reference to CSA

 

[Andystraughan]

6mm twin and earth. hard wired

 

[trev]

You do a sum.
Then apply diversity. (not the rubbish dance group of Britain's Got Talent fame)
Then do some more sums which will give you the actual wattage.
You can then decide what the rating of the MCB should be and the csa of the cable that will supply it after taking derating factors into account.
(clue - you're unlikely to be able to supply this with a 13 amp supply)

 

[uksparks]

6mm twin and earth. hard wired

Flex would be more suitable as twin and earth is not meant to be used for appliances in this way. I'd be using H05VVF or a bit of H07RN-F as that's got the grease and oil and heat protection more so than the H05.

 

[Risteard]

6mm twin and earth. hard wired

It will be referencing total connected load (which will exceed the actual total possible load). If they say 2.5 flex is fine then obviously it is fine.

And 2.5 cannot go into a BS 1363 plug - the maximum is 1.5

 

[davesparks]

Since when did they take the use of t&e for connecting fixed appliances which don't vibrate out of the regs?

 

[davesparks]

It will be referencing total connected load (which will exceed the actual total possible load). If they say 2.5 flex is fine then obviously it is fine.

And 2.5 cannot go into a BS 1363 plug - the maximum is 1.5

2.5 can go in to 13A plugs, you just have to get the right plugs. Duraplug are definately specced up to 2.5 and I think permaplug are too.

 

[Risteard]

Since when did they take the use of t&e for connecting fixed appliances which don't vibrate out of the regs?

It will be the manufacturer who stipulates flex, although more than likely they will specify some type that is near impossible to acquire!

 

[Risteard]

2.5 can go in to 13A plugs, you just have to get the right plugs. Duraplug are definately specced up to 2.5 and I think permaplug are too.

Well it would be fair to say that the BS 1363 Standard states that the maximum size is 1.5

 

[telectrix]

2.5mm or 4.0mm HR flex into a dedicated 32A cooker circuit. job done.

 

[Risteard]

2.5mm or 4.0mm HR flex into a dedicated 32A cooker circuit. job done.

That's what I'd do.

 

[davesparks]

I meant that as a reply to uksparks.

Ho5rr-f is a fairly common cable, vv-f or rn-f variants are not veryuch different as far as this application is concerned.
I can't remember the full details, but the breakdown is roughly:
H - harmonized
03 - 300Volt 05 -500Volt 07 - 750Volt
R - rubber N - neoprene (first letter insulation, second letter sheath)

Core size code tells you number of cores, whether it's has an earth and the size of the cores:

4G2.5mm is 4 cores, with earth coloured core, size 2.5mm

2X1.5 is 2 cores, no earth coloured core, size 1.5mm

 

[amckay]

You do a sum.
Then apply diversity. (not the rubbish dance group of Britain's Got Talent fame)
Then do some more sums which will give you the actual wattage.
You can then decide what the rating of the MCB should be and the csa of the cable that will supply it after taking derating factors into account.
(clue - you're unlikely to be able to supply this with a 13 amp supply)

It'll have to be 4mm (CCC is 36A) as 6.7kw = 31.02A. Can't really apply diversity as its in a butty shop so will be constant use (although I get it toggles on/off when reached desired temp)

Thanks everyone else

 

[uksparks]

yes I was reading something about it the other day funnily enough, H07RN-F Cable / H07 Cable / H07RNF / HO7RN-F

 

[trev]

My first thoughts were 4mm t+e but it may appear I can get away with 2.5mm
But surely it can't go on a plug?

Thanks everyone else

Come on mate, you seriously ask that question about a 6.7K appliance and expect me not to take the p1$$?
I must be losing my comedy edge

 

[davesparks]

But surely it can't go on a plug?

Plugs in use in the UKavailable in standard sizes of 2,5,10,13,15,16,32,63,125,400,660 and 800Amps.

 

[trev]

I took the op to mean a 13 amper Dave but you've truly wee'd on my mick taking mate.
Karma is a funny thing

 

[Silly Sausage]

I must be losing my comedy edge

We're wasting our time/years of highly honed wit on these youngsters Trev!

 

[amckay]

Lol maybe I should have worded it like this, surely the regs say it has to be hard wired lol I thought they only went up to 63A, ya really do learn summat new everyday

 

[davesparks]

No requirement to be hardwired as far as I know, in fact you can usually see the sockets for the cookers etc in a lot of fast food places.

Ceeform/commando sockets and plugs are available in 16, 32, 63 and 125 Amp sizes, once you go bigger than that you get into 'powerlock' connectors. These are mainly used by the DNO's and teh entertainment industry. If you see a DNO generator in use with a bunch of orange singles coming out of it they usually have powerlocks on the end. I am familliar with them from the entertainment industry due to having to drag the blasted cables through mud, p!ss and sh!t at festivals.

And here's a pic of 400A powerlock extension leads, the 660A and 800A versions look pretty much identical.