Kitchen on own circuit

[uksparks]

Am I being thick or are kitchens supposed to be on their own circuit, I'm talking of a brand spanking new house.

 

[turnitonagain]

hi there, problem with 32a ring is that in the future someone else might take a radial supply to say a socket, and not use a fused spur to control the 2.5 cable, the radial would be fused at 32 a which is too high for 2.5, better to keep radials and not to exceed the loop impedance and volt drop for that circut. which in a normal size 2000 sq.foot should have no problems there.

ps. i mean a radial supply taken from the ring main.

 

[alanl]

as regard loads, kettle 12a, dishwasher 10 heating,wash mc, etc etc remember a safe working for 2.5 is about 15 amps a max load is about 20 amps, also i find it easier to install radial circuts.

B****cks.
The safe working ampage for a 2.5mm conductor is dependant on installation methods, but in typically 'cable in plaster' domestic settings, will be around 27 Amps.
There is no differential between 'safe' and 'maximum' - there is enough leeway in the current carrying capacity to run at maximum ampage all the time without detriment to the installation.
In domestic settings, it is very very rare to exceed the ratings of the circuit breakers for more than a couple of minutes, hence why we use diversity when designing a circuit.

 

[andyb]

as regard loads, kettle 12a, dishwasher 10 heating,wash mc, etc etc remember a safe working for 2.5 is about 15 amps a max load is about 20 amps, also i find it easier to install radial circuts.

We all install circuits taking into account various factors, I wouldn't tell anyone that they should use one method over another. But why do you say that installing a radial is easier than a ring? I cannot see that, if anything they are similar but a ring costs less due to the conductor size. I'm referring to a 32a circuit.

 

[Deleted member 9648]

Interesting thread,specially interesting is an almost 3000 post member thinking there's a regulation that kitchens have to be on their own circuit.
Doesn't anyone have a regs book these days?
Regarding radials,I tested a school recently,wired just 6 years ago with all sockets being on 4.0mm radials. around 50% of the circuits had a Zs which considerably exceeded the max value for the OCPD. Well thought out that one!

 

[Engineer54]

ps. i mean a radial supply taken from the ring main.

I knew what you meant. Providing only one single or double socket outlet is supplied there isn't a problem with the 2.5mm cable as it's not seeing the rings other loads. Providing all normal ring circuit parameters and requirements are in compliance, you could have an unfused spur from every socket outlet providing the load does not exceed the spur cables CCC...

You can't unfortunately cater for the incompetent or the DIYer's altering any electrical installation, that would be impossible to achieve...

 

[turnitonagain]

its my personal choice of installation, not a rule for everyone.

 

[turnitonagain]

i agree, as i said earlier its only my personal choice for running circuits. again in the event of a sustained overload on that piece of[radial] cable a 32a breaker might not provide the required protection,

 

[turnitonagain]

i know we could chat forever on various aspects of installation, but to other readers, as long as any circuits installed meet the requirements for fault protection and use of proper materials and installation methods, nobody should have any concerns. cheers.

 

[turnitonagain]

radial circuits are ideal where you dont have long runs eg, houses, kitchen circuits should be always run separate from other circuits, i would agree if i was designing a school or large commercial installation i would use ring circuits to keep the required loop values in check.

 

[Adam W]

You can't unfortunately cater for the incompetent or the DIYer's altering any electrical installation, that would be impossible to achieve...

A properly thought out installation will mitigate the likelihood of it.

 

[turnitonagain]

i would not drive a car to the max speed on the odometer, allowing 27 amps to flow on a 2.5 radial or ring circuit is not a good idea, again, my personal opinion.

 

[Geordie Spark]

i would not drive a car to the max speed on the odometer, allowing 27 amps to flow on a 2.5 radial or ring circuit is not a good idea, again, my personal opinion.

You won't find the "speed" on the odometer - the mileage yes, but the speed no!

(I'm bored today)

 

[turnitonagain]

im sorry your right, i know nothing about cars!! lol

 

[telectrix]

i would not drive a car to the max speed on the odometer, allowing 27 amps to flow on a 2.5 radial or ring circuit is not a good idea, again, my personal opinion.

using your own analogy, i'd liken the 27A to cruising speed. occasional short durations of overload (speed) accepted.

 

[Geordie Spark]

im sorry your right, i know nothing about cars!! lol

All you need to know about them is they are like women - handy to have but can cost you a lot of money!

(with the exception of Tidyboiler who is the cheapest date I've ever had and the best Internet Bargain in the history of Google!!)