All Rcbos

[Jack of all]

Someones told me that to comply with the latest regs then a split load board with half the circuits as rcbos & the rest on mcbs with an RCD is no good & all rcbos is the way to go.
I can see the point but it seems overkill ???

 

[Pete999]

Someones told me that to comply with the latest regs then a split load board with half the circuits as rcbos & the rest on mcbs with an RCD is no good & all rcbos is the way to go.
I can see the point but it seems overkill ???

Someone has been telling you porkies mate

 

[uksparks]

Not that I am aware of, I'll take a look but it's a new one on me. But yes a board full of RCBOs is ultimately better.

 

[TJ Anderson]

Someones told me that to comply with the latest regs then a split load board with half the circuits as rcbos & the rest on mcbs with an RCD is no good & all rcbos is the way to go.
I can see the point but it seems overkill ???

Dual RCD CU complies with 17th full stop. Anything with RCBO's which will reduce disruption to rest of install under single circuit earth fault condition is going to be better but certainly not a requirement.

 

[Jack of all]

His idea was that no interaction between circuits is allowed & one circuit tripping the RCD and taking out several others is interaction.
Thanks for the replies ... I'm not totally up to speed with things & I'm thankful of that input..

 

[TJ Anderson]

His idea was that no interaction between circuits is allowed & one circuit tripping the RCD and taking out several others is interaction.
Thanks for the replies ... I'm not totally up to speed with things & I'm thankful of that input..

He is right in what he is saying. However it is not a requirement. Ask him to quote regulation that stipulates RCBO's.

 

[123]

And what do they do in a TT system?

 

[Plonker 3]

So the person who told you this doesnt install any circuits on just MCBs then?

 

[TJ Anderson]

And what do they do in a TT system?

DP or SPSN RCBO's

 

[Plonker 3]

DP or SPDT RCBO's

Whats SPDT?

 

[TJ Anderson]

Whats SPDT?

Edited, SPSN.

 

[Plonker 3]

Thought that was what you meant, or I was having a blonde moment.

 

[trev]

Thought that was what you meant, or I was having a blonde moment.

A blonde moment? Ya Baaldy marra

 

[Plonker 3]

A blonde moment? Ya Baaldy marra

You dont just have hair on your head you know

 

[Deleted member 26818]

The Regulation that refers to this is: "314.2 Separate circuits shall be provided for parts of the installation which need to be separately controlled, in such a way that those circuits are not affected by the failure of other circuits, and due account shall be taken of the consequences of the operation of any single protective device."

 

[Engineer54]

An all RCBO CU/DB be they SP+N or SP is by far superior to the common split 17th ed CU's or it's predecessors. They are to all intent and purpose, an industry cost effective compromise, that to my mind is not really fit for purpose. eg, ...a problem on one circuit can and will affect several other circuits.

Where a TT installation is involved, the RCBO's should be SP+N or DP.....

 

[Jack of all]

I know the trade does love it's abbreviations & changing the names for stuff & since it seems that earth has to be T for Terra then the old PME (permanent earth .. now defunked ) ought to be PMT...

LOL

 

[Pete999]

I know the trade does love it's abbreviations & changing the names for stuff & since it seems that earth has to be T for Terra then the old PME (permanent earth .. now defunked ) ought to be PMT...

LOL

Permanent Earth???? what's that then

 

[R G]

Permanent Earth???? what's that then

Got some in my garden mate , good for growing stuff....

 

[Pete999]

Got some in my garden mate , good for growing stuff....

Me to but mine needs a good dig over( permanent earth indeed)