Another fuse board change post!

[Mynamesmatt]

People will start to get bored of me soon!

So im changing my CU in a few days and im just about to buy all the materials.. just need a little help with direction

Ive already got an 18 way crabtree starbreaker, just need to fill it up and need some help with amp rating and protection

Firstly, i need two rcd's for the split load configuration.. im just a bit confused as to which ones i need..

Whats the difference between the crabtree rcd's that take up 2 spaces on the CU, compared to the one that takes up 3? hmm..

Also what ampage do i need to go for, 63a or 80a?

And is an 8kw shower ok on a 40a MCB?

thanks for the help guys

 

[cbw]

And if you have no 25mm tails just use all 3 cores of 10mm twin and earth.

 

[alarm man]

This is a electricians forum, you are doing electricians work, any one carrying out this sort of job should understand the basic principles. You seem to lack them.

Advice given to Mr DIY doesn't hurt anyone, but this sort of job could lead to a serious situation or even death.

I like many others will try and give as good advice as possible, which I think you will find I did in my first post on this thread. By all means continue asking but also be prepared for hearing things that you may not want to hear.

a read of his prev posts he's been a spark for 6 years,his words not mine,

 

[somersetsparks]

People will start to get bored of me soon!

So im changing my CU in a few days and im just about to buy all the materials.. just need a little help with direction

Ive already got an 18 way crabtree starbreaker, just need to fill it up and need some help with amp rating and protection


Firstly, i need two rcd's for the split load configuration.. im just a bit confused as to which ones i need..

Whats the difference between the crabtree rcd's that take up 2 spaces on the CU, compared to the one that takes up 3? hmm..

Also what ampage do i need to go for, 63a or 80a?

And is an 8kw shower ok on a 40a MCB?

thanks for the help guys

with regards to the rcd's that take up 3 modules, these are for the older starbreakers, back in the days when rcd were big strapping things, not like the weeds of today!
If you have an old board which i suspect you may have then check how many 'gaps' there are on the busbar to see if you need a 3 module

 

[Geordie Spark]

a read of his prev posts he's been a spark for 6 years,his words not mine,

Aye, ..... and I'm a billionaire, male supermodel and offshore power boat racer. (In me dreams !!)

 

[Des 56]

matt, we have been here before.... You admit you are not part P registered, yet seem to be doing loads of notifiable work in your house without really understanding the basics.
I realise that a few forum members have told you to do what you like in your own home, but the majority of us here are professional electricians who have spent a fortune on training, instruments, part P membership, and I don't think it is unreasonable of us to advise you to get a qualified, registered electrician in to do this notifiable work!

Guitarist I was one,but let me qualify my advise at that time
The advise I gave was in relation to the procedure for part p and the crazy situation where a spark can't do notifiable work in his own home without paying to Labc to do the job he is trained to do
I still believe in my opinion being valid on that particular subject

Having said the above,I also take at face value, a person comes on here and says he is a trained spark

He is,by asking the basic questions at the start of the thread, making me think that he may not be all that he declared,because a trained spark should be able to work out a rating for a shower mcb

 

[alarm man]

male supermodel

if man at c&a counts then yes you are...

 

[Swicade]

You'll need to decide on the right busbar before anything else as a Starbreaker board isn't that flexible.

Then as others have said it's best you do the required calc's to workout what breakers are needed for what circuit (TBH for alot of basic domestic circuit's MCB sizing doesn't need calculations to work out). Cable sizing calculations aren't that much different no matter what sort of Electrical work is carried out....ust need to read the reg's/guides and have a good understanding of them.

Kinda had your back on the ringmain thread (not too difficult that one with alittle direction) but in truth if you cant workout the right calculations for a CU change i highly recommend you get a Part P sparks in. Work with them and they'll probably help you understand the calculation procedure aswell.........they can also sign the works off to keep everything nice and legal aswell.

 

[Guitarist]

Guitarist I was one,but let me qualify my advise at that time
The advise I gave was in relation to the procedure for part p and the crazy situation where a spark can't do notifiable work in his own home without paying to Labc to do the job he is trained to do
I still believe in my opinion being valid on that particular subject

Having said the above,I also take at face value, a person comes on here and says he is a trained spark

He is,by asking the basic questions at the start of the thread, making me think that he may not be all that he declared,because a trained spark should be able to work out a rating for a shower mcb

Des, I understand where you guys are coming from, I really do.
I was an industrial spark for about 15 years before turning to the dark side (domestic), and I had to look up some of the regs back in the old 15th/16th edition days because although we did the regs courses, we didn't use a lot of it in industry.
My point in this thread, and in the RFC one, is that although matt may have some electrical knowledge, he is not part P registered and should not be carrying out notifiable work.....end of.
I am also somewhat concerned that although he may have an industrial background, the questions asked seem very basic for any qualified electrician, from any background.
If you look at my posts, you will see that I have offered a great deal of help to many people, but there are some posts I feel we should just be saying "get an electrician in" and this is one of them.

 

[alarm man]

im not part p and i do work in my own home,and i have not or ever will pay someone to tell them i am

 

[Geordie Spark]

Des, I understand where you guys are coming from, I really do.
I was an industrial spark for about 15 years before turning to the dark side (domestic), and I had to look up some of the regs back in the old 15th/16th edition days because although we did the regs courses, we didn't use a lot of it in industry.
My point in this thread, and in the RFC one, is that although matt may have some electrical knowledge, he is not part P registered and should not be carrying out notifiable work.....end of.
I am also somewhat concerned that although he may have an industrial background, the questions asked seem very basic for any qualified electrician, from any background.
If you look at my posts, you will see that I have offered a great deal of help to many people, but there are some posts I feel we should just be saying "get an electrician in" and this is one of them.

Nail hit on head !!!

 

[sparks1973]

Des, I understand where you guys are coming from, I really do.
I was an industrial spark for about 15 years before turning to the dark side (domestic), and I had to look up some of the regs back in the old 15th/16th edition days because although we did the regs courses, we didn't use a lot of it in industry.
My point in this thread, and in the RFC one, is that although matt may have some electrical knowledge, he is not part P registered and should not be carrying out notifiable work.....end of.
I am also somewhat concerned that although he may have an industrial background, the questions asked seem very basic for any qualified electrician, from any background.
If you look at my posts, you will see that I have offered a great deal of help to many people, but there are some posts I feel we should just be saying "get an electrician in" and this is one of them.

well i sometimes think that were all being targeted for info in here by the guy at the end of the bar who `got a bit of work` for himself...(probably at the expense of an electrician).....you can usually tell though....

 

[Spark1979]

Well this sums up the industry no wonder qualified blokes have no work! Can the last real electrician please turn the lights off when he leaves!!!

 

[sparks1973]

Well this sums up the industry no wonder qualified blokes have no work! Can the last real electrician please turn the lights off when he leaves!!!

yep...will do...

 

[Guitarist]

I just wonder how many "I have a job to do in my own home" questions are really from odd-job men and other trades "doing a bit of electrical work", to get the sympathies of the "do what you like" brigade on the forum.

 

[alarm man]

I just wonder how many "I have a job to do in my own home" questions are really from odd-job men and other trades "doing a bit of electrical work", to get the sympathies of the "do what you like" brigade on the forum.

well odd job men and other trades are just the same as a diy'er,a spark working in on his own home should not have to pay for the privilege,i think that point was overlooked in the part p novel