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Rcds,mcbs jcbs? (Read 21064 times)
cupid
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Rcds,mcbs jcbs?
May 19th, 2004, 9:38pm
 
Proberly like lamb to the slaughter,pleeeeeeeeeeese help,just ran a new 10mm cable from CU to new extention to supply cooker,what of the above and what amp do i need? Kiss

ps:I have got a good idea its not the last one Wink
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Re: Rcds,mcbs jcbs?
Reply #1 - May 19th, 2004, 10:43pm
 
aren't JCBs the things you worry about digging through your armoured runs Wink

rcds are not needed on cooker cuircuits and i would suggest using the non-rcd side of your cu especially if the rcd is small

the mcb should be sized to cope with the rating of the cooker and the socket (if present)
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LSpark
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Re: Rcds,mcbs jcbs?
Reply #2 - May 20th, 2004, 1:53am
 
oval shaped cable 10mm rated at current of ~43A+
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cupid
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Re: Rcds,mcbs jcbs?
Reply #3 - May 20th, 2004, 9:04pm
 
Many thanks:plugwash,L.spark.
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LSpark
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Re: Rcds,mcbs jcbs?
Reply #4 - May 21st, 2004, 1:14am
 
no probs, feel free to post back here with any further problems you encounter as were here to help afterall.
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Re: Rcds,mcbs jcbs?
Reply #5 - May 24th, 2004, 12:58am
 
Nobody has asked what rating the cooker is in KW?
So how do we know what mcb is required?

10.00mm T+E is rated at more than 40A but what is the cooker rated at?

Come on lads, pull your socks up here!

TT
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Re: Rcds,mcbs jcbs?
Reply #6 - May 24th, 2004, 1:10am
 
no MCB was suggested it seems, and without the kW you couldnt fuse it correctly anyway, i could have asked when i gave the rating of 10mm, but didnt appear obvious  Roll Eyes
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Re: Rcds,mcbs jcbs?
Reply #7 - May 24th, 2004, 6:51pm
 
Depending on installation method 10mm able to carry up to 64 amps but more likely it will be 44 amps for standard installation. So assuming 44 amps thats 10,560 watts - so if ya installing a big 12kW cooker (hob and oven) then rip out that 10mm and fit 16mm! Else a 45 amp MCB will do the trick and dont fit RCD side.

By the way if its an oven ONLY its probably fitted with a 13 amp plug, if this is the case ya need a much lower value MCB and do fit a lower value MCB.

RR
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Re: Rcds,mcbs jcbs?
Reply #8 - May 24th, 2004, 7:42pm
 
Yep - too many variables eh? We need to ask more questions to get more info before replying chaps.

Not having a go here but you can see what might happen.

TT
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rabbit_rabbit
Re: Rcds,mcbs jcbs?
Reply #9 - May 24th, 2004, 9:07pm
 
Well yes TT. Indeed it is a big problem with forums really. It is not possible, when ya think about it, for any non-experienced person or DIYer, to put into writing the data that a pro actually needs. Almost by definition were they able to then they would not be asking the question coz they will know the answer.

Ray

PS. Ya have a PM mate.

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Re: Rcds,mcbs jcbs?
Reply #10 - May 24th, 2004, 10:39pm
 
thanks for point that out Ray, yea you have a PM from me too Trician, it's Rays actualy, it's all PM's flying about tonight eh lol  Roll Eyes
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Re: Rcds,mcbs jcbs?
Reply #11 - May 30th, 2004, 12:37am
 
It should be feed from the rcd side of the board if the cooker control switch has a 13a outlet on it!!!

BS
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Re: Rcds,mcbs jcbs?
Reply #12 - May 30th, 2004, 12:41am
 
there comes the old "feasiblly supply equipment outside the equipotential zone" argument again Wink
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Re: Rcds,mcbs jcbs?
Reply #13 - May 30th, 2004, 1:53am
 
super sparks gotta get a new avatar bad, thats 3 sparks including him now....  Roll Eyes
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Re: Rcds,mcbs jcbs?
Reply #14 - May 30th, 2004, 3:47pm
 
just to say many THANKS again everyone  Kiss

cupid
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unphased
Re: Rcds,mcbs jcbs?
Reply #15 - Jun 1st, 2004, 1:04am
 
Tut tut lads

Dont forget ya can use diversity on a cooker circuit!!!

First 10A plus 30% remainder plus 5A for socket.  Hardly ever need owt bigger than 6mm!
In fact just done a "theoretical" cable size on a 6kW cooker with 15m cable and 2.5mm2 is plenty! I can show calcs if ya dont believe me!

Roy
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Re: Rcds,mcbs jcbs?
Reply #16 - Jun 1st, 2004, 11:26am
 
yes according to regs you can
BUT
remember the breaker should be specced to protect the cable so on 2.5mm you can't fit more than 20A
AND
while this is allowed there is a significant chance of a trip and it is likelhy to come at the worst possible time (when prepareing for a large party or similar)

most sparkys i have spoken to reccomend specifying cooker cuircuits to the full rating of the cooker
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