Two cables connected to mcb

[Jay89]

Evening All

Im sure this will have been discussed at some point (if so please point me to a relevant thread)

I have been to look at some remedial work where a previous inspector has flagged up on multiple circuits 'DBx Cx has two cables in mcb, need separating - C2'

These circuits are either lighting or radial power circuits supplying a small amount of sockets. All suitably rated and with decent R1+R2 readings.

I have never seen this to be worthy of a mention let alone a C2 code, i have spoken to my CPS technical and they said they cant see an issue. Just looking for anyone else's opinion

Thanks in advance!

 

[buzzlightyear]

I have been to look at some remedial work where a previous inspector has flagged up on multiple circuits 'DBx Cx has two cables in mcb, need separating - C2'

have you got eicr test certs

 

[Jay89]

have you got eicr test certs

Not to hand but yes i have seen the full EICR

 

[telectrix]

so.you have 2 radials from 1 MCB and each is suitably protected by the In rating of the MCB and Zs readings are compliant. . what's the problem

 

[buzzlightyear]

'DBx Cx has two cables in mcb

did you take pic of c/u.

 

[Octopus]

Sounds a load of bs to me.

Need more information

And you could have 10 cables in a mcb ..,

 

[Jay89]

so.you have 2 radials from 1 MCB and each is suitably protected by the In rating of the MCB and Zs readings are compliant. . what's the problem

My thoughts exactly!

 

[buzzlightyear]

if its feeding to2 radials and the appropriate mcb that should not be a problem.

 

[Jay89]

Sounds a load of bs to me.

Need more information

And you could have 10 cables in a mcb ..,

This is literally the extent of it, code 2 because as they put it two circuits supplied by one MCB.

 

[buzzlightyear]

what a load of tosh.

 

[Jay89]

if its feeding to2 radials and the appropriate mcb that should not be a problem.

Thanks, im glad you agree

 

[Midwest]

Sounds a load of bs to me.

Need more information

And you could have 10 cables in a mcb ..,

Why aren't you soaking up the sun, and drinking those lite beers the Yanks favour, instead of wasting your time on here. Holiday of a life time you said!!

 

[Midwest]

Evening All



I have been to look at some remedial work where a previous inspector has flagged up on multiple circuits 'DBx Cx has two cables in mcb, need separating -

Your EICR chaps, I don't know. What about RFC's, you got two cables in a mcb there

 

[Jay89]

Your EICR chaps, I don't know. What about RFC's, you got two cables in a mcb there

I think they're suggesting two radials rather than two cables is the issue, badly worded title. But yes the specific example they give in the OSG of taking a spur off RFC at the MCB came to mind when i saw it too.

 

[Des 56]

Your EICR chaps, I don't know. What about RFC's, you got two cables in a mcb there

2 conductor mcb for rings and 1 conductor mcb for radials ?

 

[westward10]

I would C3 it, two final circuits require individual circuit protection.

 

[davesparks]

I would C3 it, two final circuits require individual circuit protection.

It's not two final circuits, it is one, the definition of a circuit in bs7671 is very clear on this.

What basis do you have for a C3? What is the improvement that can be made? Unless this Mcb is overloaded, which is a separate matter, then nothing is improved by splitting it in to two circuits

 

[Andy78]

I would C3 it, two final circuits require individual circuit protection.

I'm not biting

 

[westward10]

I suspect this is the case of an existing circuit and then someone lashing another to it because they cannot be be bothered to employ correct installation methods by using an additional protective device at a spare way or advising the existing board has inadequate capacity.

 

[Jay89]

I suspect this is the case of an existing circuit and then someone lashing another to it because they cannot be be bothered to employ correct installation methods by using an additional protective device at a spare way or advising the existing board has inadequate capacity.

There are multiple consumer units in this EICR where it has been flagged, from what i can see most seem to be part of original installation (same cable and paired dressing). Mostly on three phase boards with no spare ways.