Two cables connected to mcb

[Bobster]

So you're just trolling then?

 

[charlie76]

Sounds like there is a lot of lashing on going on.

@westward10, not arguing with your opinion on this but out of interest, someone used the principle above, say you were adding a light to an under stairs cupboard, where the consumer unit was and all cables coming out of the CU were buried and there are no spare ways. How would you do this?

 

[westward10]

Unless I could enable the supply by alternative means I would suggest the consumer unit has inadequate capacity for the provision of an additional circuit.

 

[davesparks]

Unless I could enable the supply by alternative means I would suggest the consumer unit has inadequate capacity for the provision of an additional circuit.

But there will almost certainly be capacity to supply the new light from an existing circuit.

 

[Jay89]

Unless I could enable the supply by alternative means I would suggest the consumer unit has inadequate capacity for the provision of an additional circuit.

If they wanted an additional socket in the cupboard, how would you feel about taking a spur off a RFC at the consumer unit?

 

[westward10]

If they wanted an additional socket in the cupboard, how would you feel about taking a spur off a RFC at the consumer unit?

Perfectly acceptable or incorporate into the ring final. A lot going on in this cupboard.

 

[davesparks]

Perfectly acceptable.

How does that differ from doing it with a radial circuit?

 

[charlie76]

All you are doing is the following. Still one circuit as far as i'm concerned. How is this an issue?

 

[streamer]

Unless I could enable the supply by alternative means I would suggest the consumer unit has inadequate capacity for the provision of an additional circuit.

And the customer would think you were at it!

 

[westward10]

And the customer would think you were at it!

At what.

 

[streamer]

At what.

They would think you are trying to invent work by suggesting the only way to put a light in the cupboard would be to change the consumer unit or get to a feed at the nearest switch or light fitting.

 

[westward10]

I wouldn't suggest changing the CU at all.

 

[streamer]

So if there wasn't a spare way in the consumer unit would you insist on finding a feed elsewhere?

 

[Cadgey123]

314-01-04 off the top of my head but I suspect you know this.

Quick enough to jump down someone else's throat when regulations need quoted???

A joint is a joint regardless of at a switch, socket or MCB in consumer unit.

 

[charlie76]

Well, well, well. Just look at the diagram below from an IEE Wiring Matters article. The diagram is taken from the IET Electricians Guide to the Building Regulations.
I think they have 2 radials in one MCB there or I could be seeing things.
Someone better notify the IET that their diagram does not comply with their regulations...

Right, thats put that one to bed. Now i'm off to bed...

 

[Octopus]

^^ not sure I agree with your perhaps C3....

The most common time I see 2 cables is into lighting circuits.... Where a second cable goes to the bell transformer..... But it's still only 1 circuit!

 

[Deleted member 9648]

 

[ChrisElectrical88]

I think the way @Westward was putting this he sees it a lot, like me where we may do more EICRs in factory's and large commercial installs where some of this stuff is absolutely lashed in and clotheslined all over the place, then they have piggy backed off an MCB and lashed the N &CPC in any old terminal. There is thousands of installations with rough work. Not all of this refers to neatly adding mrs jones a new light fitting under the stairs

Edit: There is no disputing the regs and evidence people have put forward but I will always continue to note it the same way I described in an earlier post

 

[Deleted member 9648]

^^^ Noting it is fine, coding something which is not a departure and may result in unnecessary expenditure is not.

 

[davesparks]

Well, well, well. Just look at the diagram below from an IEE Wiring Matters article. The diagram is taken from the IET Electricians Guide to the Building Regulations.
I think they have 2 radials in one MCB there or I could be seeing things.
Someone better notify the IET that their diagram does not comply with their regulations...

Right, thats put that one to bed. Now i'm off to bed...


View attachment 37331

Without the whole article the picture is a bit useless, for all we know the article could be using the picture to illustrate incorrect design.