workin out kw's

[uklad]

Say you had 2 lights both 500w, a heater say 2000w and a 13amp socket. The lights and heater come to 3kw's, what would you put for the 13amp socket

 

[JohnD]

"put" where?

 

[Steve]

a banana.

 

[ukpaul]

Nothing.

 

[GaryMo]

P = V x I

230 x 13 = 2990W or 2.99kW.

Is that what you're getting at?

 

[ban-all-sheds]

He might be getting at this:

http://www.diynot.com/forums/viewtopic.php?p=1480839#1480839

?

 

[uklad]

Its not for anything, its just what u was sayin about how many kw's a cable can take, now its easy to work out how many watts ur gonna use in ur lights, but how would u work out what ur gonna use in 13amp sockets

 

[uklad]

Sorry about the u's am on my phone again

 

[GaryMo]

Just beacuse you're sending from a phone doesn't mean it should be in text style writing.

Please use real words.

You're going to have to be a little more specific as I thought I knew what you meant as per my post above but now I haven't got a clue

 

[BS3036]

uklad: people would have had a better chance of understanding your question if you had continued on the first thread. Making a new thread means no-one knows what you're on about.

The 13A socket can be used for any size of load up to 13A. You may choose to allow less if you *know* that it will never be used above a particular value of load, which is rather unlikely. But only you can tell that. So you would probably need to allow 13A for the socket.

 

[Taylortwocities]

For instance, there may be a radial circuit with a 20amp fuse at the consumer unit.

On this circuit there could be six double 13amp sockets. This a perfectly workable practical circuit in use in many houses.

6 x 2 x 13A = 156amps but the designer will know that most of the sockets will be used for TVs, Sky boxes, charging phones etc.

A different design would be used if the sockets were for electric fires.

 

[Chri5]

Say you had 2 lights both 500w, a heater say 2000w and a 13amp socket. The lights and heater come to 3kw's, what would you put for the 13amp socket

A socket takes up to 13a but the load will depend on the appliance plugged in, which as a non fixed item usage will be variable. All you can really do is know that the whole socket circuit is limited by the fuse rating which is 30 amp for a 2.5mm ring and 20 amp for a 2.5mm radial.

On your example is the heater plugged in to the same ring as the socket ?

 

[ban-all-sheds]

uklad - basically take note of this:

i have a 6mm swa running from my fuse box on a 50amp mcb with rcd about 60meters to the barn

That cable is far too small already, so you cannot use that for anything else.

As a minimum, you would want a new 25mm cable to replace the existing 6mm. The cable alone will be several hundred pounds.

and stop d*****g around trying to make what you want to do work without putting in a larger cable, OK?

 

[uklad]

Yes ban-all-sheds i did ask that about the barn and i thought that it was very interseting how its all worked out, its got nothing todo with that now, i was just trying to understand how it all works, sorry for askin lads seems like this site is just about doing it right not understanding why you do it right

 

[Chri5]

Please repeat your question and we will endeavour to help out, I applaud anyone that not only wants an answer but has the curiosity to want to learn more.

From what I gather BAS has assumed that your question is based on attempting to try and find an alternative to a previous answer you didn't want / expect or like.

Unfair, given that you have stated that this is not the case.