cooker circuit

What size is the cable?

 

You would need two 32A cooker circuits. Both wired in 6mm2 T&E via 45A double pole switch. The standard default no need to calc cooker circuit. Put the 4 ring ceramic hob on its own 32A circuit and bang the other two on the other 32A circuit. That's how I would do it. There are other ways, but, no, a 20A circuit is no longer adequate.

 

10-12mm wide could be 2.5 or 4 mm Typical sizes are 5.3x9.9 >> 2.5mm; 6.1x11.4 >> 4mm; 6.8x13.1 >> 6mm they do vary a little from those dimensions and normally 2.5 is solid with 4 and above being stranded.

 

The current guidance on cooker circuits allows 15kW on a standard 32A radial circuit wired in 6mm2 T&E on a 32A MCB.

This is because it allows for diversity as in practice all the elements would never be on simultaneously.

If you already had this 'standard type' of Cooker Circuit in place I would leave it as is.

Being as you haven't then it would do no harm to run a 10mm supply in.

You certainly don't need 2 supplies.

 

i normaly know the diff between the 30amp cooker cable and the 45amp cooker cable by the earth 30amp has a solid earth the 45amp has a stranded earth (have to watch tho as some of the old instal cable all had stranded earth) then from there work out the distance just to be sure the cable can take the 45amp over the distance (had one once that had 45amp cable but on a 30amp fuse due to the distance)

 

I would have to caution against referring to 30A cable or 45A cable, as frankly there is no such thing.

The current-carrying capacity of a cable can vary greatly depending on how it is installed.

 

Hmm. Not sure I follow, Lucinda. Imperial sized T&E would have multi-strand cpc, metric 6.00mm2 has single core cpc. Both were/are traditionally used for 30A/32A cooker circuits. The SWITCH is rated at 45A, not the cable.

 

yes well we dont all live in the world of books and know everything so sometimes use laymans terms thank you i know there is really no such thing however there are standard uses at standard amps that certin cable sizes are used for thats all

 

yea it was an old instal

 

I don't agree. Never during my working life has anyone asked me to fit "30A cable". They would specify the cross-sectional area.

And if I was designing a job then I would work out what was needed based on the installation method and Cc Ci Cg Ca Cr etc., volt drop (if it came into play), Zs etc.

 

well most common cable size for sockets, most common size for lighting circuits, most common size for cookers most common size for a shower (all based on small run length ie not needing up rateing etc) and the normal rateing on said cable?

 

All sparks will speak in cable size, not "lighting cable" etc.

 

yea but you wouldnt use 1.5mm cable for a ring final (socket circuit would you?)

 

think about when breaker rateings where changed to take advantage of metric cable size how long did it take to get use to saying the new number (all im saying is there anything wrong calling something a slang term or based on its common use? Or is against the regs) i want to learn (no jokes or scarasam ment btw)

 

No, but you may use 4 or even 6 if required.

 

ok fair play (but kind of knew that 1) i know in tec the spark lecture often refared to cable size by what it was often used for to test how quickly you could pick out the right size from the un labeled reels on offer) and always wanted to know was this right as i say based on a common circuit not needing up rating

 

Every spark I know (and me) calls cable by it's sizing.
Can I get a drum of 2.5? or Can I get a drum of 27A rated cable?

I've never heard of someone calling it by its common use, unless its in an installation, where it makes sense to call it the 'cooker cable' as opposed to '10mm'.