Ring main.

[JKMRK1]

Question I have is, is it ok to have x2 ring main circuits on one 32amp type B MCB??

If so does this meet the current regs.

TIA.

 

[Pete999]

Question I have is, is it ok to have x2 ring main circuits on one 32amp type B MCB??

If so does this meet the current regs.

TIA.

No not really, a circuit originate from 1 OCPD, secondly it's not a "Ring Main" it's a Ring Final Circuit RFC, pedantic but correct terminology counts these days.

 

[buzzlightyear]

Two rings of a circuit, got the regs?

 

[JKMRK1]

Two rings of a circuit, got the regs?

Yes I have the regs book, which states final circuits should be connected to a seperate way in the CU. But I've seen so many others argue this is OK??

 

[buzzlightyear]

No is the answer, you will overload the mcb
Are you adjusting a circuit or putting another one in and have no room in CU.

 

[DPG]

Yes I have the regs book, which states final circuits should be connected to a seperate way in the CU. But I've seen so many others argue this is OK??

I've never seen many people argue that two ring finals one one MCB is a good idea.

 

[JKMRK1]

No is the answer, you will overload the mcb
Are you adjusting a circuit or putting another one in and have no room in CU.

I've come across this in the house I've just purchased. There's a spare way in the board I'll add another MCB and seperate them.

 

[Pete999]

Yes I have the regs book, which states final circuits should be connected to a seperate way in the CU. But I've seen so many others argue this is OK??

I'll reiterate, a circuit originates from an individual OCPD if some dipstick has decided to combine 2 RFCs into 1 circuit incorrectly then He / She needs to hang up their screwdrivers, and take up another Trade.

 

[buzzlightyear]

I've never seen many people argue that two lring finals one one MCB is a good idea.

the chuckle brothers electrical. Lol

 

[JKMRK1]

I've never seen many people argue that two ring finals one one MCB is a good idea.

I'm not saying it's correct just saying what I've seen. That's why I've asked the question to make sure its correct.
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I'll reiterate, a circuit originates from an individual OCPD if some dipstick has decided to combine 2 RFCs into 1 circuit incorrectly then He / She needs to hang up their screwdrivers, and take up another Trade.

Thanks for the advice it is much appreciated?

 

[Pete999]

I'm not saying it's correct just saying what I've seen. That's why I've asked the question to make sure its correct.

Well no then it isn't
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I'm not saying it's correct just saying what I've seen. That's why I've asked the question to make sure its correct.
[automerge]1588089613[/automerge]

Thanks for the advice it is much appreciated?

You are more than welcome Mate
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I'm not saying it's correct just saying what I've seen. That's why I've asked the question to make sure its correct.
[automerge]1588089613[/automerge]

Thanks for the advice it is much appreciated?

See description of a circuit in OSG or BS 7671

 

[Mark Wright]

You could put more than one radial on a MCB but its not good practice.
2 Rings on 32mcb is dangerous are you sure it's not 2 radials?

2 rings would have four wires goinging into a MCB

Some people spur off a MCB maybe it was that - 3 wires?

 

[DPG]

If there is a spare way in the CU then I would question why someone has decided to combine the two circuits. I recommend doing full set of dead tests before connecting up.

 

[JKMRK1]

You could put more than one radial on a MCB but its not good practice.
2 Rings on 32mcb is dangerous are you sure it's not 2 radials?

2 rings would have four wires goinging into a MCB

Some people spur off a MCB maybe it was that - 3 wires?

Definitely two rings there are 4 cables in the MCB. I'm going to add another way and seperate them.

 

[Mark Wright]

Looking at this thread there is argument that it is safe but not common
_theiet.org/forums/forum/messageview.cfm?catid=205&threadid=32208

I suppose you could argue it's just extending the Ring??? - 2 large rings would surely cause constant tripping.