Kitchen New Ring

[saviomsilva]

Hi All

I would like to thank you EFLImpudence for answering my previous question but there is another thing i would like to ask.

I am running a new ring into this outdated kitchen that had only 1 power Socket in it

I am running a 2.5mm2 cable that comes from the MCU with a 32A fuse breaker

Please see in the picture

I am connecting a fridge/freezer(single unit), washing machine, mirror, 2 double sockets, cooker hood and combi boiler

I would like to know if the process meets the Uk standard and if the way i am connecting is fine as i am doing it myself

What is sad is that i spend 3 weeks trying to find an electrician but could not get none. the few that come in said i should receive a quote over the post but this quotes never arrived. hence doing it myself to gain time as i need kichen ready for xmas

Thank you all for your comments

Untitled

• saviomsilva
• 10 Nov 2011
• 1

 

[curium]

Can't answer your question but I must say that failure to send through a quote when a tradesmen says he will gets my goat.

We had a similar problem finding a plasterer to skim over our artex ceiling. I assume it's because they think the job is too small for them but I'd rather they were honest and said so rather then wasting my time.

 

[holmslaw]

..

 

[Mrdjc]

Get yourself a piece of paper and work out what kind of devices you might connect up and have switched on at the same time, and work out how many Watt's they will use.

For example, deep fat fryer, 1500W, microwave 800W, extractor fan 150W, fridge 250W etc etc.

Take that figure (2700W in example above), and convert it to Current (Ampere)

Power (P) [Watt] = Current (I) [Ampere] * Voltage (U) [Volts]
P=I*U ==> I=P/U

P=2700
U= 230

I = 2700/230 = 11.73A

Work out the length of cable you require, and go to TLC's voltage drop calculator and see if it will be sufficient according to the tables.
http://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html

I'm not sure how it works with ring mains as you effectively double up the current carrying capacity of the cable.

Maybe someone more qualified will be able to provide the theory on that.

Also I'd ditch the MCB and get a RCBO instead, Sticking the fridge/freezer on its own circuit is also advisable as they can often give earth faults, or the other way round, if the power trips in your kitchen whilst your away at least the fridge will remain on.

 

[ebee]

The boiler will go off and the pipes freeze up

If you are putting in separate circuits then I would consider give Boiler priority over fridge freezer . Better still both on separates.
I know its only a sketch and maybe the cable lengths are not represented but try to spread the load around the ring or a least make most of it around the middle one third with regards to circuit length. Good design is to try to ensure, as far as reasonably practicable, that both legs draw similar amounts.

If you were in my neck of the woods I woulda given a price fairly promptly.

As stated - don`t forget it is notifiable.

 

[ban-all-sheds]

I would like to know if the process meets the Uk standard and if the way i am connecting is fine as i am doing it myself

1) The law requires you to obtain Building Regulations approval for this work before you start. You have to submit an application to your local council.

As part of that you'll have to explain what you'll do to ensure that your work will comply with Part P of the Building Regulations.



You can read more about it here: //www.diynot.com/wiki/electrics:part-p


2) I don't know where you will be running the cables, but if they are going to be concealed you'll have to consider the requirements for that:

• http://www.voltimum.co.uk/files/gb/attachments/niu/l/attachments/c5-43.pdf
  
  
• http://web.archive.org/web/20061110111450/http://www.niceic.org.uk/downloads/concealedcables.pdf
  
  
• IEE article
  
  
• IEE Article on 17th Edition requirements for concealed cables.

and the affect that burying them might have on their current-carrying capacity. Reading all of the sections in 4.3 of this guide would be a good idea:

http://www.tlc-direct.co.uk/Book/4.3.1.htm

For a ring final the cable has to have a current carrying capacity of at least 20A.

You also have to satisfy yourself, as designer, that you won't be overloading any section of it for long periods.

3) You'll need to carry out several tests on the circuit, both before and after energising it. These must be carried out in the correct sequence, you'll need to buy or hire the equipment, and you'll need to learn how to use it, what each of the tests does, why they are done, and what results you'll get if it's OK.

http://www.tlc-direct.co.uk/Book/8.1.1.htm

 

[saviomsilva]

Hi All

I would like to thank you EFLImpudence for answering my previous question but there is another thing i would like to ask.

I am running a new ring into this outdated kitchen that had only 1 power Socket in it

I am running a 2.5mm2 cable that comes from the MCU with a 32A fuse breaker

Please see in the picture

I am connecting a fridge/freezer(single unit), washing machine, mirror, 2 double sockets, cooker hood and combi boiler

I would like to know if the process meets the Uk standard and if the way i am connecting is fine as i am doing it myself

What is sad is that i spend 3 weeks trying to find an electrician but could not get none. the few that come in said i should receive a quote over the post but this quotes never arrived. hence doing it myself to gain time as i need kichen ready for xmas

Thank you all for your comments

Untitled

• saviomsilva
• 10 Nov 2011
• 1

Any one know a eletrician in Guildford.... i wanted to change the old 4 fuse box pyro cable to a new rcb box but i could not find anyone that does this type of work + the eletrician that come here said for that tipe of work i will need a speacialist in pyro cable

help please

 

[Iwonder]

Also don't use fcu's (fused spur - sic) to feed sockets, use 20A double pole switches.
quote]

sorry to intrude, just picking up tips! why would you use a double pole switch over a fused spur 13amp spur? just curious. thanks

 

[holmslaw]

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[holmslaw]

..

 

[saviomsilva]

i wanted to change the old 4 fuse box pyro cable to a new rcb box but i could not find anyone that does this type of work + the eletrician that come here said for that tipe of work i will need a speacialist in pyro cable

Oh dear, I'm thinking this is a flat built with concrete walls and floors/ceilings.

If I'm correct, thats the real reason for the sparks lack of interest. Rewiring or adding wiring to that type of structure is very difficult.

it is a fairly old buillding but all the chasing on the wall are already done

i am just lookin on a correct way for connecting these stuff.

anyone know a good eletrician in this area?

 

[flameport]

I am connecting a fridge/freezer(single unit), washing machine, mirror, 2 double sockets, cooker hood and combi boiler

Untitled

• saviomsilva
• 10 Nov 2011
• 1

2 sockets in a kitchen is totally inadequate.

If that diagram represents the actual wiring layout, it needs to be changed to avoid that long length of cable from the last socket to the consumer unit.

Mirror?

 

[saviomsilva]

I am connecting a fridge/freezer(single unit), washing machine, mirror, 2 double sockets, cooker hood and combi boiler

Untitled

• saviomsilva
• 10 Nov 2011
• 1

2 sockets in a kitchen is totally inadequate.

If that diagram represents the actual wiring layout, it needs to be changed to avoid that long length of cable from the last socket to the consumer unit.

Mirror?

Yeah that will be a mirror connected

The last socket to the MCU it is a 6 meter cable

another thing is that i run out for breaker on my MCU( i have only 4 breaker)

1 dedicated to the cooker
1 dedicated to the lights
1 dedicated to sockets in the house
and this spare one that i wanted to run this ring

Your help is much apreciated

 

[ban-all-sheds]

4 is very small.

Is it an old Wylex with plug-in breakers? And no RCD?