That mean the senile one never.
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11 years ago
Electricity supply for boilers
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11 years ago
I see you have run out of medication.
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11 years ago
A 3 kW draw is well a 3kW draw. Duh!
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11 years ago
Again.....
"A 3kW immersion off a ring IS correctly wired". Show me where it says it cannot be?
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11 years ago
433.1.5 and Appendix 15 apply.
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11 years ago
433.1.5 and Appendix 15 apply.
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11 years ago
An electric kettle? Not all are 3 kW. Not that you understand what that means - any more than having 'permanent' high loads on a final ring circuit.
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11 years ago
Show me where it says it cannot be !!!
A relative has a 1970/80s house with a small CU high up in the downstairs toilet. One main incomer, 2 32A ring mcbs, 2 6A lighting mcbs, one Cooker run with a mcb. The immersion was off the living room and bedroom ring - rarely used as all is gas. So 1 incomer and 5 mcbs. No space for a new CU and only one spare in the CU. He replaced the mcbs with RCBOs and now it is all 17th compliant. All for £125 and half an hour.
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11 years ago
Senile person, many are 3kW
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11 years ago
Well a 1970s to mid 1980s house would not have a CU. It would have a fusebox.
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11 years ago
Think the definition of a CU is a 'fusebox' with integral main switch. But I could be wrong.
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11 years ago
Just correcting your usual incorrect statement. It is needed as so much you write is rubbish.
You might care to speculate why an immersion heater should be on its own radial circuit, but a kettle is ok on a final circuit ring. But I'd guess it's beyond you.
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11 years ago
Your failed ECT treatments delivered around 0.8A for a few seconds.
If you took 0.8A through what little of your brain still works, for an hour, you would be able to put it in a bun and have it for tea. That's the difference.
Things get hot with long term high currents but not with brief applications of the same...
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11 years ago
I was just pointing out that Drivels relatives did not have a CU or a fusebox that would allow them to swap fuses for RCBOs if it was the original
1970- 1980s CU/fusebox.- Vote on answer
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11 years ago
=A0 London SW
There is obviously something here that I am missing. 3kw is 12A - the MCB for a ring main is 30A, the current capacity of the cable is ~24A and it is a ring so simple logic says that a 48A load is possible, so surely a quarter of that - 12A load - for an extended period is quite reasonable.
Rob
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11 years ago
And if the immersion is not in the midload point?
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11 years ago
An immersion heater could conceivably be drawing full current all the time, in a house where lots of hot water is needed. Rings ain't designed for this. In the same way as you don't have permanent space heaters on them. It used to be allowed, but current regs require a radial circuit. It's rather the same as using a ring in an office or factory. It can end in tears. They are designed for only occasional high loads.
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11 years ago
=A0 London SW
Thanks - certainly I wired my own immersion as a radial 30 years ago.
Rob
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11 years ago
It did !!! It had a buz bar. You are silly.
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11 years ago
This one is an idiot.