cooker cable size
- Thread starter k3v1n
- Start date
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Without figures at hand it's safe to say that a 6mm2 cable will be inadequate for protection by a 32A OPD due to a 5M run through insulation.
You may just get it with a 10mm2 cable, though you'll need to verify it through calculation as you'll be signing as the designer of the circuit.
You may just get it with a 10mm2 cable, though you'll need to verify it through calculation as you'll be signing as the designer of the circuit.
P
PrinceofDarkness
6mm cable is more than adequate for a standard 32A cooker circuit, regardless of the method of installation.
There's no need to make a drama of it.
Lucia.
There's no need to make a drama of it.
Lucia.
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k3v1n, you are an apprentice electrician.
If you are having trouble understanding Appendix 4 and whatever textbooks and college notes you have then you should be asking your lecturer(s) for help, not coming here to get other people to do your assignment work for you so that it looks as if you do understand it. That may be a short-term fix, but as a long term strategy it is catastrophic.
If you are having trouble understanding Appendix 4 and whatever textbooks and college notes you have then you should be asking your lecturer(s) for help, not coming here to get other people to do your assignment work for you so that it looks as if you do understand it. That may be a short-term fix, but as a long term strategy it is catastrophic.
If it is indeed a college question and the cable is running through 5M of insulation as stated then I hope the OP doesn't take your advice!
hmm lets see...
6mm² T+E is good for 47A clipped direct..
through more than 0.5m of insulation you have to de-rate that by half..
so that's 23.5A..
so no, not good on a 32A circuit..
6mm² T+E is good for 47A clipped direct..
through more than 0.5m of insulation you have to de-rate that by half..
so that's 23.5A..
so no, not good on a 32A circuit..
P
PrinceofDarkness
So, it isn't a college-kid question?
If this is a real-life. practical question, then 6mm will be fine on a 32A MCB for such a load even though it passes through a significant length of insulation (the which, could be avoided in most cases).
A domestic cooking appliance is hardly a continuous load 24/7 load, is it?
A domestic cooker stands idle for most of its life (it does in my house, anyway). But when it is called on, it seldom reaches its FLC for significant periods.
This is why we are allowed to use the diversity rules that have remained unchanged for more than half-a-century - with no apparent need for a change.
So, it's 10 Amps + 30% of the remainder etc......
10 to 12kW at 235V is roughly 47 Amps.
10A + 30% of 37A is roughly 21 Amps - which is half the rating of a sensibly installed 6mm cable.
So where's the actual drama?
Too many text books here........
Lucia.
Kevin, is this a college assignment question or a real life scenerio?
If it's the latter, is it something you're intending to do?
If it's the latter, is it something you're intending to do?
k3v1n, you are an apprentice electrician.too many people on here just like to take the mic instead of helping
If you are having trouble understanding Appendix 4 and whatever textbooks and college notes you have then you should be asking your lecturer(s) for help, not coming here to get other people to do your assignment work for you so that it looks as if you do understand it. That may be a short-term fix, but as a long term strategy it is catastrophic.
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