Shed/Garden Electrics?

[RyanPaul]

The total amp on the mcb has to be higher that the total of that in the shed?

 

[davesparks]

Main reason was because the main switch is 63amps, I know that means that's what the switch can handle not what SHOULD be fed before anyone jumps, I've got a 20amp mcb and a 6 amp so a 30 amp mcb from the house would do on 4mm if I'm not right correct me?

Depends on the type of cable and where/how it is installed. You may need 6mm or bigger if the type of cable and other factors require it

 

[RyanPaul]

So you are going to rip out the 6mm cable you claim you already installed in post #11 ?

Pure fantasy this thread

Yes.. Is that a problem if yours? I can get cable not a problem

 

[telectrix]

Ib<In<Iz for a start. now tellus what cable and OCPD.

 

[stuartr]

I've ran my 6mm cable, positioned, fixed and terminated all cables into the shed CU

Thought you already had your 6mm in place? ?.

 

[Andy78]

Yes.. Is that a problem if yours? I can get cable not a problem

But why would you do that ?

 

[TJ Anderson]

Main reason was because the main switch is 63amps, I know that means that's what the switch can handle not what SHOULD be fed before anyone jumps, I've got a 20amp mcb and a 6 amp so a 30 amp mcb from the house would do on 4mm if I'm not right correct me?

20A is more than enough for the capacity you require so for a 10M run you could have used 2.5mm 3 Core SWA.

Required Cable Size	2.5 mm
Voltage Drop	2.61 Volts.
Percentage Drop	1.1%
Current Load	17.4 Amps
Max Cable Load[SUP]*[/SUP]	21.4 Amps

 

[RyanPaul]

But why would you do that ?

Well I don't have to I'm going to leave it but I meant that 4mm cable could handle that load

 

[Charlie_]

You have a 20amp and a 6amp MCB? Simply double them up and hey presto you've got a 26amp MCB!
are you part p registered?
As owner and installer you will be doubly screwed if not

 

[Guest77]

I want to put a 2 way consumer unit into my shed to feed 2 outdoor sockets and a couple of spot lights.

I have bought the CU with a 63 A main switch, 1 x 20 amp for sockets and 1 x 6 amp for lighting,
now my question is, can I take a supply from my kitchen socket (fed from a 16 amp mcb) through the wall to the shed in 2.5 mm or 4.mm cable into the 63 amp main switch?

If that's not sufficient then what size cable to go from my house CU to shed CU (under 20 meters away) and can i connect that to a 35 amp mcb or do i have to connect it to a 63 amp?

I don't want to do a FCU as I may add more lighting in the future and a CU looks neater.

Thanks, Ryan.

The more I read this the more I despair, as the thread has moved on I have read your posts and then looked back at this, is this post correct or are we still with the 6mm2 cable in on a 32 amp MCB now? or is it a 35 amp and a 4mm2? is the run 7 mtrs or 20? what about the extra future lighting load? or are we at the 2.5mm2 off the ring circuit? confused . com here.

 

[Andy78]

Well I don't have to I'm going to leave it but I meant that 4mm cable could handle that load

No that's not what you said.
This whole thread is poppycock, balderdash, claptrap and piffle. And for that reason...I'm afraid I can't invest any more time here, so........ I'm out.

 

[trev]

Well I don't have to I'm going to leave it but I meant that 4mm cable could handle that load

To be a good liar you have to have a good memory Ryan. I too am now convinced this is all BS. Congratulations on sucking a lot of people in, I hope you enjoyed yourself.
Oh and welcome to my ignore list, you're in good company on there.

 

[RyanPaul]

You have a 20amp and a 6amp MCB? Simply double them up and hey presto you've got a 26amp MCB!
are you part p registered?
As owner and installer you will be doubly screwed if not

Yes I am I wouldn't do it if I wasn't

 

[Marvo]

to be fair I never thought of looking back through my stuff, it was just a pretty basic question that could have had a basic answer as it is only basic work!

It's very basic work but the consequences of getting it wrong are potentially dangerous or even lethal.

yeah I've got a multi meter but have access to a MEGGER so thats not a prob........

You don't have sufficient test equipment to work safely or test the installation correctly.


I'm closing this thread I'm afraid, I've got serious doubts that you're working safely and can design this safely. I'd suggest getting a more experienced sparky to shadow you on this job to refresh your skills you learned several years ago. It might mean you don't make profit on this particular job but it would be safer for the customer and you'd benefit in knowledge.