Which breaker to use?

[Sabi]

Hi, I`m thinking of putting a small consumer unit in my shed using 4mm armoured cable. it will have 3 plugs and 1 light.

Right the problem I have is I don't know what size breaker to use in the house and is it a good idea to have 2 RCD breakers 1 in the house and 1 in the shed?

Any advice would help.

Thank you

 

[RF Lighting]

1) why do you think you need a consumer unit in the shed?

2) how did you come up with 4.0mm² as being the correct sized cable to use, if you don't know your load requirements or circuit breaker size?

3) no you should have one RCD protecting final circuits, if it is required.

 

[Sabi]

hi RF Lighting, I have had a couple of electrician out and I recall 1 of then saying 4mm will do the job and a separate consumer unit in the shed will be ideal for the lighting and the ring main

 

[RF Lighting]

What are you planning on plugging in in your shed?


How far will the cable run from the house to the shed be?

 

[Sabi]

it will only be use for the lawnmower, hover, drill, sander, and to charge my cordless drill, it is 4 meters from the house

 

[PrenticeBoyofDerry]

It would be wise to allow an electrician to design, install and sign off the work.
But to answer your question, 4.00mm SWA buried in ground will be suitably protected by a 32A type B MCB.

 

[ban-all-sheds]

hi RF Lighting, I have had a couple of electrician out

Do you not plan to give one of them the job?

 

[winston1]

20 amp breaker in the house plus RCD if one not already there. 2.5mm SWA to shed (though 4mm will do if you have already bought it), one radial for 3 sockets and 1 FCU feeding the light in the shed. Certainly no need for a CU in the shed.

What is a hover? Did you mean Hoover. If so what is it? A Hoover washing machine is a much bigger load than one of their small appliances.

 

[AndyPRK]

What is a hover? Did you mead Hoover.

 

[winston1]

Now corrected, thanks. Question still not answered.

 

[JohnW2]

Now corrected, thanks. Question still not answered.

That might just be because the answer is 'obvious', hence the question pedantic. Have you really ever heard anyone refer to a washing machine (or anything else other than a vacuum cleaner) as "a Hoover"?

Kind Regards, John

 

[AndyPRK]

you know very well he means a vacuum cleaner

 

[bernardgreen]

Dam...... I thought it was private hydro electric scheme

 

[ban-all-sheds]

If it was, I wonder if he'd have aswan on the reservoir?

 

[winston1]

you know very well he means a vacuum cleaner

Well. Why didn't he say so then?