Multiple consumer units

[ElectricEddie]

The over current protective device that is protecting each 16mm T&E.

63amp each I was planning to use

 

[davesparks]

63A what?

 

[ElectricEddie]

63amp each I was planning to use

That is of course providing that I keep the set up in the same way distribution wise and don't use swa but my 16mm the is below 50 mm all the way through the run

 

[ElectricEddie]

63a 30ma rcd

 

[ElectricEddie]

I think I need to think about this a bit more and do some more calculations that you for everyone's input I will update in a couple of days

 

[ElectricEddie]

* thank you

 

[Leesparkykent]

The thing is Eddie if you use an mcb for the distribution circuits then you have next to no chance of discrimination with the final circuits.

edit: An RCD doesn't provide over current protection.

 

[davesparks]

63a 30ma rcd

He asked for the OCPD, not the additional protection!

 

[Leesparkykent]

Best thing I think you can do is sit down and revaluate the whole design.

 

[ElectricEddie]

Yer I am going to cheers guys the issue regarding distribution has been the bit I have been stuck I want to get it right hence seeking advice on here I will get someone with more experience to come in and have a look but looks like I'm going to run it in swa i will properly calculate the csa's and get back to this forum afterwards, I appreciate this should have been done beforehand

 

[ElectricEddie]

The thing is Eddie if you use an mcb for the distribution circuits then you have next to no chance of discrimination with the final circuits.

edit: An RCD doesn't provide over current protection.

if I ran swa out of a fused isolator switch for each submain would that provide me with the protection that I need dependant on demand etc

 

[davesparks]

if I ran swa out of a fused isolator switch for each submain would that provide me with the protection that I need dependant on demand etc

Maybe, it depends on what protection you need for a start.
Follow the design process to select cable type, size, OCPD etc etc

And I think the term you are looking for is 'switchfuse'

 

[Simonslimline]

if I ran swa out of a fused isolator switch for each submain would that provide me with the protection that I need dependant on demand etc

Do you own a copy of BS7671?

 

[ElectricEddie]

Do you own a copy of BS7671?

Of course

 

[Simonslimline]

Of course

It may be a good place to look for the answers to these questions perhaps!

 

[DuaneMHunt1976]

Hope you get it sorted Eddie, I'm trying to keep up with this post and learn a bit more
Humans hay, keep learning and changing or fade away

 

[Leesparkykent]

Hope you get it sorted Eddie, I'm trying to keep up with this post and learn a bit more
Humans hay, keep learning and changing or fade away

Sounds like it could be a decent job if it's designed properly.

 

[Marvo]

Could you advise what would be best to do please

What size OCPD are you planning on using for the 4 x distribution circuits?

63a 30ma rcd

Yer I am going to cheers guys the issue regarding distribution has been the bit I have been stuck I want to get it right hence seeking advice on here I will get someone with more experience to come in and have a look but looks like I'm going to run it in swa i will properly calculate the csa's and get back to this forum afterwards, I appreciate this should have been done beforehand

I think by your own admission you're not very experienced in this type of design and this thread is turning into blow by blow instructions on an installation that only you have seen so it's guesswork at best by those attempting to help you out and this is why I'm closing the thread. I'd say your suggestion about getting assistance, or at least some guidance on site from someone with more experience in designing this type of installation might save you a lot of problems.

If you've got a more specific electrical question rather than blanket design assistance please feel free to open a new thread.