Wiring Diagram Barn / Workshop

[Magnet]

You seem to have  good basic electrical knowledge ,Beety , would you not be doing it yourself ? 

All this knowledge about cable sizes , radial circuits , SWA , RCDs  sounds like someone from the trade. 

  However you show a 4core  X 16mm  SWA  feeding that RCD Consumer Units  ...I'm assuming they are SP  so only 2core needed .

I also assume that the 3ph box is a switch panel as opposed to a distribution board , my mistake,  so you will have each CU on a different phase , I'm up to speed now .        

Yes that is all correct .

 

[ProDave]

"I am not paying anyone for the design"

Then you will be paying MORE to get the job done then.

It is normal practice just to mark the position of all sockets, switches, light fittings etc O(and which switche(s) controls which light. That is ALL the electrician needs. He then designs it in the best way he can. That doesn't usually mean hours of work and a high cost, it just means working it out on site based on his experience and knowledge of the regs.

If he is FORCED to wire it in a particular way, I can pretty much guarantee that he won't like it, it will take longer because it's not how he normally does it, and he will factor in the "awkward customer" contingency as he will expect you to nit pick everything.

your job, your call, just don't come complaining when it goes pear shaped and costs a lot more than you expected

 

[Magnet]

so you expect us to all do the design for you for free?

how about you go buy a copy of 7671, read all 400 and odd pages of it, then do the design yourself

and what happens at the end when your circuits do not comply with volt dropZs etc and has to be ripped out and started again? this is all done at design stage

I have a copy of BS7671 , if it had to be ripped out so be it , but I would bet you a pound to a penny that aint going to happen and you know that yourself .

 

[Murdoch]

I must admit I find the OP a bit of a conundrum.... Happy to spend hours on the card and the internet ......whereas they should be concentrating on what they needs, where and what they should be planning for the future, networking, tv, sound, etc 

I avoid clients like this like the plague....

 

[Sidewinder]

None of the DB belong to the DNO , there their incoming gear is in another building .

It would also never consist of distribution boards, the DNO don't do DB's they only have the responsibility for provision up to their circuit protective device, aka "head" or "cut-out".

 

[Sidewinder]

I have a copy of BS7671 , if it had to be ripped out so be it , but I would bet you a pound to a penny that aint going to happen and you know that yourself .

So, if you have a copy of BS7671, & you fully understand the requirements, then you are fine to do the calculations and design, so why are you asking?

You should be more than happy with your design, and be willing to draft a specification for your electrician to quote against, install, then I&T to, with you signing and taking legal responsibility for said design.

I am confused as to why you feel that you are competent to do the design and accept legal responsibility for it, by signing the EIC, yet, you still feel that you have to ask for input from an internet forum,

This really, really confuses me.

Or, have I misunderstood?

 

[SPECIAL LOCATION]

[as per post 40]

Hello  Beetyboop44 a few members have already asked this question, but so far you have failed to answer it.....

I will just ask it again with a bit more clarification. 

Borrow a copy of BS7671:2008 Amendment 3:2015,

have a look at the electrical installation certificate on page 414 and the boxes requiring signatures regarding the design of this proposed installation.

Who is going to be signing those boxes?

This is a fundamental constructive point that needs to be addressed. Is it you or someone else?

If its you.......

go ahead with your knowledge of BS7671 as per the signature box...

Or leave it to someone else..

As has already been pointed out!

 

[Magnet]

OK , Guy's

Thank you all for all your constructive  advice , lost my way a bit at the end of this marathon , to many constructive answers to read , I think it best I go now and leave all you highly trained sparkies to do what you do , sometimes here you would think I was doing a drawing for wiring the Houses of Parliament  , not a simple Barn / Workshop , didn't think you need to be a genius to do that .

 

[leesparkykent]

OK , Guy's

Thank you all for all your constructive  advice , lost my way a bit at the end of this marathon , to many constructive answers to read , I think it best I go now and leave all you highly trained sparkies to do what you do , sometimes here you would think I was doing a drawing for wiring the Houses of Parliament  , not a simple Barn / Workshop , didn't think you need to be a genius to do that .

:coat

 

[Sidewinder]

OK , Guy's

Thank you all for all your constructive  advice , lost my way a bit at the end of this marathon , to many constructive answers to read , I think it best I go now and leave all you highly trained sparkies to do what you do , sometimes here you would think I was doing a drawing for wiring the Houses of Parliament  , not a simple Barn / Workshop , didn't think you need to be a genius to do that .

No you don't need to be a genius to do either your barn/workshop, nor the houses of parliament, but there are some things in common, and some things specific to each individual location.

I'll give you one last example, is the origin of the supply in your barn?

Does your barn have any extraneous conductive parts?

What is the supply type to the property?

Please come back with the answers to these questions, as they are fundamental to getting the design of the barn install correct and compliant.

 

[SPECIAL LOCATION]

OK , Guy's

Thank you all for all your constructive  advice , lost my way a bit at the end of this marathon , to many constructive answers to read , I think it best I go now and leave all you highly trained sparkies to do what you do , sometimes here you would think I was doing a drawing for wiring the Houses of Parliament  , not a simple Barn / Workshop , didn't think you need to be a genius to do that .

Any chance of letting us know the answer to post 40 or 48......

design and certification etc..

is just as much a part of BS7671 as the cables and fuses bits..

Or aren't they in the copy you have??

:C

 

[Lurch]

Don't waste your time, OP is better off going and doing what they want regardless, she is way more cleverer than any of us will ever be able to comprehend.

 

[Magnet]

Hello  Beetyboop44 a few members have already asked this question, but so far you have failed to answer it.....

I will just ask it again with a bit more clarification. 

Borrow a copy of BS7671:2008 Amendment 3:2015,

have a look at the electrical installation certificate on page 414 and the boxes requiring signatures regarding the design of this proposed installation.

Who is going to be signing those boxes?

This is a fundamental constructive point that needs to be addressed. Is it you or someone else?

If its you.......

go ahead with your knowledge of BS7671 as per the signature box...

Or leave it to someone else..

As has already been pointed out!

The Electrician will be doing the work so he will be signing of any certs required after he has completed the work to what we both would of agree'd on .

 

[SPECIAL LOCATION]

The Electrician will be doing the work so he will be signing of any certs required after he has completed the work to what we both would of agree'd on .

So either the question was a bit to complex for you to grasp..

or you haven't actually seen page 414?

There are three different boxes for signatures..

1 for Design

2 for Construction

3 for Inspection and testing..

I can understand a.n.other will be doing the signing of boxes 2 & 3....

But either you are signing box 1..  in which case why are you asking here..   as you should be competent as per the declaration to do the design..

or a.n.other will be signing box 1...

in which case let them do the design that they will be signing for and accepting liability for, if the whole project goes pear shaped and your barn burns down..

I can't see how this concept is considered unconstructive or  being in need of a genius mind...

Just basic common sense  IMHO.

:C  

 

[Magnet]

The Electrician will be doing the work so he will be signing of any certs required after he has completed the work to what we both would of agree'd on .

Is this page 414 BS 7671

View attachment 7498

 

[Tony S]

I’ve just realised why I stuck to industrial work.

An electrician can do mechanical work, a fitter can’t do electrical work.

 

[Magnet]

Is this page 414 BS 7671

 

[NozSpark]

Haaa....LOL

We're on Amd 3 (2015) now, so the book that you're using as reference is just a few years out of date

I know that the basics don't change much,,, but there have been significant changed since Amd 1

I've only just seen this thread,,,,, but as others have said...

You do the specification and leave the Design, Installation and Testing to whoever you employ to do the work

 

[Lurch]

Is this page 414 BS 7671

Sort of, page 414 from an old outdated version, not that it makes a lot of difference to you either way.

 

[SPECIAL LOCATION]

Is this page 414 BS 7671

View attachment 7498

No..

Amendment 2 was 2013

Amendment 3 was 2015

it will be page 390 (I think?) in that out of date version you are using!!!

(but that example certificates in you book have now changed a bit. )

:shakehead

You don't need to be a genius..

but you do need to keep up to date..