Design

[stewart]

Hi. I have written in before but can't remember or find my old username ... but hey! no matter, I'm a born-again Competent person

I've got my part p and have just completed the 17th Edition wiring regulations course ... and I learned a few things while doing the 17th Regs.

I found out that to satisfy the 17th Edition, a consumer unit has to have at least 2 rcds. I cannot find where the regs say this so could someone enlighten me to the relevent section please. I ask cause I have just fitted a 4 way consumer unit in a domestic dwelling TN-S and it was agreed that 1 rcd to protect the supply would be sufficient.

I realise from 314.1 that installations are to be divided into circuits to avoid hazards but as the intention is to keep to the existing provision of 1 lighting + 1 power + I kitchen + i cooker just assumed that providing all testing was as per regulations, that a nice new fully protected consumer unit with single rcd and 4 ways was more than sufficient. IF I have to, I'll buy another CU as the new one is not capable of splitting up.

Thanks,

Stewart

 

[Risteard]

The short answer is that the Regulations do not require you to have more than one RCD. In fact, the Regulations do not state that every installation necessarily must have any RCDs dependant on a number of factors.

The reference is to minimising inconvenience in the event of a fault, which to me suggests a risk assessment based approach. If your risk assessment suggests that one RCCB would be appropriate then so be it. But you need to consider what would happen if it were to operate.

 

[TPES]

If there's only 4 ways I would just have a main switch and RCBO's protecting circuits, as this shouldn't be too expensive in comparison to buying a 5+5 dual RCD CU.

 

[GStueyXR]

RCBOs are your friend here...

 

[stewart]

RCBOs are your friend here...

Hmm, is it me or am I allowed to think your butting in is offensive? If you want to advertise go choose a handy wheelybin

 

[TPES]

Hmm, is it me or am I allowed to think your butting in is offensive? If you want to advertise go choose a handy wheelybin

You being serious?

I think it's you. You alright?

 

[stewart]

Thanks for the replies.

I got raised eyebrows when suggesting the use of 2 rcd's. You can imagine the response when I suggested rcbo's!

 

[High Tower]

Gsxr was simply pointing out that rcbo's are your best option as they offer both short circuit and overcurrent protection. I can't see how he was advertising or being offensive by this.

However if you actually WERE competent you wouldn't need us to tell you this, after you had completed the install and possibly fitted the wrong board......would you.

Did you complete the full tests, a EIC and notify??

We all have to learn and if you are building your experience and competence then this is a fantastic resource but please listen to what your being told and don't have a go at people who reply

 

[GStueyXR]

Hmm, is it me or am I allowed to think your butting in is offensive? If you want to advertise go choose a handy wheelybin

LOL, WTF are you on about?

We are all electricians here, I am hardly advertising.

Have you visited the www.I-have-a-serious-problem-making-friends.com forums?

 

[stewart]

You being serious?

I think it's you. You alright?

Sure, I'm fine thanks ......Actually, I've just realised! so it's ok to whack in 4 lines of advertising a product? the stuff under the dotted lines is advertising. Ah well.... sorry, I mean I thought the reply was meant to provide an answer and not to provide an excuse to stick in 4 lines of 'come to me' ......... lol, I think it must be me

 

[Echo]

Thats his signature. Which is posted on every single post he makes. His reply to you was:

RCBO's are your friend here...


Which is ontopic and correct.

 

[GStueyXR]

Sure, I'm fine thanks ......Actually, I've just realised! so it's ok to whack in 4 lines of advertising a product? the stuff under the dotted lines is advertising. Ah well.... sorry, I mean I thought the reply was meant to provide an answer and not to provide an excuse to stick in 4 lines of 'come to me' ......... lol, I think it must be me

It is actually just my standard footer that appears after every post i make....

And if you stick around, you may even find i am a pretty helpful poster.

 

[stewart]

Hmmm, not a good start

I seem to have caused offence. Ok, I'll apologise for my initial response but I hadn't realised the 4 lines after your single rcbo's are your friend was NOT part of your reply. It actually annoyed me, so again I apologise


I am perfectly well aware of what is a 'proper' installation, I just wanted to know if there is a distinct requirement' as in "2 rcd's HAVE to be used" ....

Now, please ..... I have apologised TWICE ............

 

[High Tower]

It is actually just my standard footer that appears after every post i make....

And if you stick around, you may even find i am a pretty helpful poster.

Lol sounds like Thomas the tank engine lol .........gsxr is a very very usefull engine......... He he

Sorry just talking dribble now

 

[GStueyXR]

lol sounds like thomas the tank engine lol .........gsxr is a very very usefull engine......... He he

sorry just talking dribble now

lmao