Cookers Hobs wired in 2.5mm flex

[nickblake]

Ok just wanted your opinion 2.5mm flex provided by the supplier on cookers and hobs , ive seen this twice and in my eye its wrong a hob of 7 kw and a slide in cooker of 7500 kw , it realy makes a mock of calculating cable sizes , ok if you take diversity into effect max current rating of flex is 25 amps ish diversity loading will be about 19 amps so all ok , well all untill you get a fault that is and the cable melts just wondering what your thoughts were , oh on both ive changed them to 6mm flex

 

[GLENNSPARK]

Ok just wanted your opinion 2.5mm flex provided by the supplier on cookers and hobs , ive seen this twice and in my eye its wrong a hob of 7 kw and a slide in cooker of 7500 kw , it realy makes a mock of calculating cable sizes , ok if you take diversity into effect max current rating of flex is 25 amps ish diversity loading will be about 19 amps so all ok , well all untill you get a fault that is and the cable melts just wondering what your thoughts were , oh on both ive changed them to 6mm flex

well as you know nick.....a fault of neglegable impedence will take out the OPD or RCD/RCBO anyway.....so i dont get your drift?...

 

[LlandrilloSpark]

Nick where did you get 6mm flex locally?, CEF do 4mm that's what I do my hobs in

 

[nickblake]

Nick where did you get 6mm flex locally?, CEF do 4mm that's what I do my hobs in

Get it from senet mate H05 6mm great stuff , funnily enough cant get 4mm in bangor

yes will trip the rcd etc to much reliance is put on RCD's these days , realistically speaking hobs and cookers can be on for long periods of time and you cant tell me they are not all used at the same time , i use all mine cooking sunday lunch and both ovens , see it to often on showers burning out and not tripping the RCD or mcb just catching fire no differance on cookers same sort of loading and possible on for longer durations ,

 

[MDJ]

probably tri-rated heat resistant TBH bud.

 

[GLENNSPARK]

probably tri-rated heat resistant TBH bud.

i would have thought so mike.....

 

[LlandrilloSpark]

Cheers nick I now know where to go for it!, can get 4mm in CEF Llandudno but I've stop dealing with them now, it's Network in Mochdre or Electric fix for me!

 

[Engineer54]

Ok just wanted your opinion 2.5mm flex provided by the supplier on cookers and hobs , ive seen this twice and in my eye its wrong a hob of 7 kw and a slide in cooker of 7500 kw , it realy makes a mock of calculating cable sizes , ok if you take diversity into effect max current rating of flex is 25 amps ish diversity loading will be about 19 amps so all ok , well all untill you get a fault that is and the cable melts just wondering what your thoughts were , oh on both ive changed them to 6mm flex

Are you saying that the manufactures don't know what cable size/type to provide for the appliances they are producing and selling to the general public??

 

[Knobhead]

Some things niggling at me, some thing to do with manufacturers recomendations?

 

[Silly Sausage]

Ok just wanted your opinion 2.5mm flex provided by the supplier on cookers and hobs , ive seen this twice and in my eye its wrong a hob of 7 kw and a slide in cooker of 7500 kw That's one hell of an oven!
, it realy makes a mock of calculating cable sizes , ok if you take diversity into effect max current rating of flex is 25 amps ish diversity loading will be about 19 amps so all ok , well all untill you get a fault that is and the cable melts just wondering what your thoughts were , oh on both ive changed them to 6mm flex

So what happens to the fixed cct wiring in the event of a fault when there's several 100 Amps flowing?